JPH04295376A - Sprinkler fire facility - Google Patents

Abstract

PURPOSE:To stop a fire extinguishing agent from being discharged wastefully so as to reduce damage caused by the loss of water by providing within the rise portion of secondary piping a closing means for closing an opening means which is open to atmosphere. CONSTITUTION:The rise portion 37 of the main pipe 51 of secondary piping 5 is formed into the shape of a rise tube which first rises and then falls, and the rise portion 37 is open to atmosphere via a drain pipe 39. An orifice 38 useful in filling the secondary piping 5 with a fire extinguishing agent without applying pressure is provided near the top portion of the rise portion 37 and a check valve 61 which allows the fire extinguishing agent to flow within the rise portion 37 in the direction in which the rise portion 37 rises but which stops the agent from flowing toward the main pipe 51 is connected to the primary side of the orifice 38. When each sprinkler head 4 is mechanically opened, the fire extinguishing agent 37 retained in the rise portion 37 is discharged toward each splinkler head 4 but the portion of the fire extinguishing agent which is located above the check valve 61 is not discharged but remains in the rise portion 37 and stops a fire extinguishing agent inside the secondary piping 5 from being sucked toward each head 4 by siphon phenomenon and the fire- extinguishing agent in the secondary piping 5 is not discharged when the agent in the rise portion 37 is discharged.

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 Various types of sprinkler fire extinguishing equipment have been used, including open type, closed type wet type, and dry type. In closed sprinkler fire extinguishing equipment, pressurized fire extinguishing fluid is always filled up to the end of the closed sprinkler head installed in each warning area, and water can be sprayed at the same time as a fire is detected. This is equipment used in buildings, etc. This closed-type sprinkler fire extinguishing system is characterized by the fact that it is constantly filled with pressurized extinguishing fluid up to the end of the piping, so it is possible to release the extinguishing fluid at the same time as the sprinkler head operates when a fire is detected. . However, if the sprinkler head opens due to an accident such as being hit by an object, pressurized fire extinguishing fluid will be released and the pressurized fluid delivery system will start to confirm that there is no fire and then stop the pump. Until then, water continues to be sprinkled, leading to serious water damage. To deal with this, a fire detector is installed in addition to the sprinkler head, and when the fire detector is activated by a fire, the fire extinguishing liquid is filled up to the sprinkler head, and water is sprayed when the sprinkler head is activated. (Formula) There is a sprinkler fire extinguishing system. In this pre-activation type, the air is slightly pressurized in the pipe to the sprinkler head, and when the fire detector detects a fire and the closed sprinkler head is activated, the fire detector and the sprinkler head are activated. Fire extinguishing fluid is released only under the AND condition, and the pipes are normally filled with pressurized air, so even if a closed sprinkler head opens due to an impact, there will be no water damage. It has the characteristic of not causing any accidents. However, this pre-acting sprinkler fire extinguishing equipment requires a compressor, etc. to pressurize the secondary piping to which the closed sprinkler head is connected, making the entire equipment complex and expensive. Even if it operates, pressurized air will initially come out, so
There is a problem that there is a delay before the fire extinguishing fluid starts discharging normally, and in addition, with these conventional fire extinguishing equipment, when extinguishing a fire, the secondary piping system where the sprinkler head is installed has a release valve on the primary side. Because high liquid pressure equivalent to that of the primary side is applied, the secondary piping, sprinkler heads, valves, and other components of the secondary piping system must be of the same pressure resistance grade as the primary side. For this reason, the cost of equipment components is high, which is one of the factors preventing the widespread use of sprinkler fire extinguishing equipment.

[0003] Therefore, in order to solve the various problems of conventional sprinkler fire extinguishing equipment, the applicant of the present application has developed a system in which the secondary side piping system of the open valve is filled with unpressurized extinguishing liquid during fire monitoring. In addition, when the head is opened, the primary pressure is reduced to a predetermined pressure and low-pressure extinguishing fluid is discharged, improving firefighting efficiency and reducing the pressure resistance of equipment components in the secondary piping system. Sprinkler fire extinguishing equipment with a lower grade has been proposed in Japanese Patent Application Nos. 2-411267 and 3-10383.

[Problem to be solved by the invention]

As illustrated in FIG. 4, the sprinkler head 4 normally connects to a main pipe 5 of a secondary pipe 5 (connected to a fire extinguishing liquid supply means (not shown) via a release valve 6 and a gate valve 9).
1 is connected to a falling-shaped attachment pipe 54 connected to a branch pipe 53 of the secondary side piping 5 via a falling pipe 52. In the above proposed fire extinguishing equipment, the riser pipe 37 connected to the main pipe 51 is connected to the drain pipe 3 through the orifice 38.
9 opens to the atmosphere, and during fire monitoring, the release valve 6 is gradually opened and the extinguishing liquid from the riser pipe 37 flows into the orifice 38.
The open valve 6 is closed while the extinguishing liquid drips into the drain pipe 39 through the drain pipe 39, and the secondary piping system is thus filled with unpressurized extinguishing liquid. However, when the sprinkler head 4 is opened due to an impact or the like, almost all of the extinguishing liquid in the secondary piping system is transferred to the opened head via the down pipe 52 and the down-shaped mounting pipe 54 due to the siphon phenomenon. It will be released from 4. If the warning area is wide, even if only one sprinkler head 4 is mechanically opened, a large amount of extinguishing liquid will be released, resulting in great damage caused by water damage. This invention was proposed in view of this problem, and aims to minimize the damage caused by water damage by eliminating the suction and discharge of fire extinguishing liquid due to the siphon phenomenon when the sprinkler head 4 is mechanically opened.

[0005]

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a fire detection means 1, a closed type sprinkler head 4, and a primary side 8 and a secondary side 7 in a normally closed state. and a release valve 6 which is opened when the fire detection means 1 detects a fire phenomenon, and the release valve 6 is opened.
The primary side piping is connected to the extinguishing liquid supply means 13, the secondary side piping 5 is connected to the closed type sprinkler head 4, and the rising part 37 of the secondary side piping 5 is connected to an opening means O that opens to the atmosphere.
is provided, and during fire monitoring, the secondary side piping 5 and the rising part 3
In the sprinkler fire extinguishing equipment in which the pipe 7 is filled with an unpressurized fire extinguishing liquid, when the fire extinguishing liquid in the rising part 37 of the secondary pipe 5 is drained from the base 51 side of the secondary pipe 5, A closing means C for closing the opening means O is provided in the middle of the rising portion 37.

The closing means C is capable of sending liquid from the side of the secondary pipe 5 to the side of the rising part 37, and is capable of discharging liquid from the side of the rising part 37 to the side of the base 51 of the secondary pipe 5. It is constituted by a check valve 61 that is designed to be blocked.

[0007] The closing means C allows liquid to be sent from the secondary piping side to the rising part 37 side, but prevents liquid from draining from the rising part 37 side to the base part 51 side of the secondary piping 5. It is constituted by a float valve 65 designed to be

[0008]

[Operation] If the extinguishing liquid is sent from the base 51 side of the secondary pipe 5, it will pass through the opening means O to the rising part 37 of the secondary pipe 5.
Since the opening means O is open to the atmosphere, the inside of the secondary side pipe 5 and its rising part 37 are also filled with unpressurized fire extinguishing liquid. When the sprinkler head 4 is mechanically opened, the extinguishing liquid in the rising part 37 is drained from the base 51 side of the secondary pipe 5 toward the sprinkler head 4, and the closing means C stops this liquid draining operation, and the extinguishing liquid in the portion above the closing means C in the rising portion 37 remains without being drained. This remaining extinguishing liquid can prevent the extinguishing liquid in the secondary piping 5 from being sucked toward the open head 4 due to the siphon phenomenon, and the extinguishing liquid in the secondary piping 5 It will no longer be released due to strain.

The closing means C is capable of sending liquid from the side of the secondary pipe 5 to the side of the rising part 37, and is capable of discharging liquid from the side of the rising part 37 to the side of the base 51 of the secondary pipe 5. It can be easily constructed by using a check valve 61 or a float valve 65 which is designed to be blocked.

0010

[Embodiments] Hereinafter, embodiments of the present invention will be explained based on the drawings. FIG. 1 is a block diagram showing the entire sprinkler fire extinguishing equipment in the first embodiment, and FIG. 2 is an explanatory diagram showing the main parts in FIG. 1 in an enlarged manner. A fire detector 1 as a fire detection means such as a differential type or a constant temperature type installed in a warning area is connected to a receiving board 3 via an electric line 2. Similar to the fire detector 1, a closed type sprinkler head 4 installed on the ceiling of the restricted area is connected via a secondary piping 5 to a secondary side 7 of an open valve 6 installed in the restricted area. The primary side 8 of the open valve 6 is connected to a pressurized liquid supply device 13 as an example of a fire extinguishing liquid supply means, and is connected to a pump 10 and a receiver panel 3 by an electric line 11 via the illustrated gate valve 9. Although not shown, the motor 12 and a normal check valve,
This pressurized liquid feeding device 13 is provided with pressurizing means such as a pressurized air tank.

A plurality of branch pipes 53 are connected to the main pipe 51 (base) of the secondary side pipe 5 via falling pipes 52, and each branch pipe 53 has a plurality of sprinkler heads 4 connected to the unwinding pipe. 56. This unwinding tube 56 is
It is shaped such that it rises a little from the branch pipe 53 and then descends.

The rising portion 37 of the main pipe 51 of the secondary pipe 5 is
It is formed into a rising pipe shape that rises up a little from the main pipe 51 and then falls down, and this rising part 37 is connected to the drain pipe 39.
It is configured as an opening means O by opening to the atmosphere through the opening. An orifice 38 is provided near the top of the rising portion 37 to serve for pressureless filling of the secondary pipe 5 with fire extinguishing fluid. The primary side of the orifice 38 allows the extinguishing liquid to flow in the upright portion 37 in the upright direction;
A check valve 61 as an example of a closing means C having a function of preventing the extinguishing liquid in 7 from flowing toward the main pipe 51,
Connected. A plurality of electrode rods 58a of the full water monitoring device 57 are provided on the rising portion 37 between the orifice 38 and the check valve 61.
, 58b, and depending on the presence or absence of conduction between the adjacent electrode rods 58a and 58b, this is determined as the water level and is notified to the receiving board 3 via the electric line 59. On the primary side of the check valve 61, when the sprinkler head 4 is erroneously opened, a decrease in the liquid pressure in the rising part 37 when the fire extinguishing liquid is about to flow down is detected, and the electric circuit 62 detects the decrease in the liquid pressure in the rising part 37, and sends the signal to the receiving panel via the full water monitoring device 57. 3 is provided with a pressure transducer 63 that notifies this pressure reduction.

The illustrated open valve 6 is equipped with a pressure regulator R that reduces and adjusts the hydraulic pressure on the primary side 8 to a predetermined pressure and supplies it to the secondary side 7. That is, the primary side 8 and the secondary side 7 of the open valve 6 are separated by a valve seat 14 and a valve body 15 that opens and closes this valve seat 14, and the valve seat wall 20 in the valve body 16 and this valve body 15 forms an operation chamber 17, and the valve element 15, which is biased by a spring 18 to close the valve seat 14, has a small hole 19 for introducing a part of the hydraulic pressure on the primary side 8. . Valve seat wall 20
A secondary operation chamber 17a is formed by the partition wall 21 in the valve box 16, and the secondary operation chamber 17a is connected to the receiver panel 3 by an electric line 23.
A motorized part 24 such as a motor or solenoid connected to
It communicates with an operating valve 25 that is opened and closed by. Control room 1
7 is provided with a valve body opening adjustment hole 26 that communicates with the secondary operation chamber 17a, and a secondary pressure monitoring chamber is formed in the valve box 16 by means of a flamm 29 attached to the other end of the needle 27. 3
0 is formed, and the secondary pressure monitoring chamber 30 is communicated with the secondary side 7 of the release valve 6 through a pipe 31. The flamm 29 is biased by a secondary pressure setting spring 28 to increase the opening of the valve body opening adjustment hole 26, and the displacement of the needle 27 integrated with the flamm 29 causes the valve body to open. The opening degree of the degree adjustment hole 26 is adjusted, and the hydraulic pressure on the primary side 8 is reduced to a predetermined pressure and supplied to the secondary side 7.

In the piping 32 connected to the secondary side 7, an electric circuit 33 detects the opening of the release valve 6 and notifies the receiving board 3 of this, and the receiving board 3 activates the pressurized liquid feeding device 13. A pressure switch 34 is provided, and a drain pipe 3 is connected via a gate valve 35.
6 is connected to this piping 32 and the secondary side of the operating valve 25. The hydraulic pressure on the primary side 8 of the open valve 6 is detected by a pressure gauge 40, and the hydraulic pressure at the end of the secondary side piping 5 is detected by a pressure gauge 46.

Next, the operation of the above embodiment will be explained. The secondary side piping system, such as the secondary side piping 5 and the rising part 37, is filled with an unpressurized fire extinguishing liquid. First, the liquid is filled using the pressurized liquid feeding device 1.
3, the operating chamber 17 is pressurized via the primary side 8 of the open valve 6. Next, the gate valve 9 is closed, and the operation valve 2 is closed.
5 is opened to reduce the pressure in the operation chamber 17, thereby making the release valve 6 openable. Then, the gate valve 9 is gradually opened, and the extinguishing liquid is slowly allowed to flow into the secondary piping system of the open valve 6. The extinguishing liquid flows from the secondary side 7 of the release valve 6 to the secondary side piping 5.
, flows through the sprinkler head 4 through the check valve 61 to the upright portion 37, passes through the orifice 38, and flows down into the drain pipe 39. When the extinguishing liquid exceeds the orifice 38, the operating valve 25 is closed and the open valve 6 is closed. As a result, the pressure fluid acting on the secondary piping system is discharged to the drain pipe 39 through the orifice 38, and the secondary piping system is filled with liquid without pressure.

During this liquid filling, the fire extinguishing liquid gradually enters the secondary piping system, so that all the air in the secondary piping 5 is not discharged from the drain pipe 39 and the top of the unwinding pipe 56 The air accumulates in the form of air 60 as schematically shown in FIG. The water level in the rising part 37 is monitored by the conduction between adjacent electrode rods 58a and 58b of the full water monitoring device 57, and in the event of an abnormality, a notification is given by the receiving board 3. For example, the electrode rod 58a
, 58b, the water level exceeds at least the upper electrode rod 58a, and when there is no conduction between the electrode rods 58a, 58b, the water level is below the lower electrode rod 58b.

In this way, the secondary pipe 5, the sprinkler head 4, etc. are filled with liquid, and the end portion of the branch pipe 51 of the secondary pipe 5 is kept open to the atmosphere through the orifice 38 to minimize the rate of communication with the atmosphere. This prevents the fire extinguishing fluid from dispersing into the atmosphere and maintains a non-pressure filled state for a long period of time. In normal conditions when the fire detector 1 is not operating, the primary side 8 of the open valve 6 in each warning area
The extinguishing liquid enters the operation chamber 17 through the small hole 19, and the valve body 15 closes the valve seat 14 due to the hydraulic pressure of the pressurized liquid feeding device 13 and the spring 18, and this extinguishing equipment is in a monitoring state. Since the secondary side piping 5 and the like are filled with extinguishing liquid without pressurization, there is almost no discharge loss of extinguishing liquid due to pipe leakage or the like during monitoring.

When the sprinkler head 4 in the center of FIG. 1 is opened due to a mechanical impact such as when an object hits the monitor, a small amount of extinguishing liquid is released from the sprinkler head 4. The discharge amount at this time becomes a value corresponding to the head H1 of the unwinding pipe 56 of the sprinkler head 4. That is, by opening the sprinkler head 4, the extinguishing liquid in the head H1 is discharged to the air 60 in the unwinding pipe 56,
The extinguishing liquid corresponding to this head H1 tries to flow down inside the rising part 37. At this time, the extinguishing liquid above the check valve 61 cannot flow down, so the extinguishing liquid remains above the check valve 61, and air enters the rising part 37 from the drain pipe 39 that is open to the atmosphere. be prevented from doing so. In this way, since air does not enter into the upright part 37, the unwind pipes 56 of other sprinkler heads 4, the down pipes 52 connecting these to the main pipe 51, and the main pipes 51 and branches near these The extinguishing liquid in the pipe 53 is not subjected to suction from the open head 4 and no siphoning occurs. Therefore, the extinguishing liquid to be released is only a very small amount corresponding to the head H1 of the unwinding pipe 56 of the sprinkler head 4 as described above, and the water damage caused by mechanical opening of the sprinkler head 4 is minimal. becomes. The rising part 37 is lower than the check valve 61.
When the fire extinguishing liquid is released, this lower part becomes negative pressure, the pressure transducer 63 detects the drop in liquid pressure, and this is transmitted to the receiver panel 3 via the full water monitoring device 57 to prevent mechanical shock. This notifies you that the sprinkler head 4 has been opened. Since the check valve 61 is used as the closing means C, the structure is simple and can be implemented at low cost.

On the other hand, when a fire occurs in the monitoring state and the fire detector 1 is activated, a fire signal is transmitted to the receiving panel 3. In the receiver panel 3, the electric part 24 is operated simultaneously with this fire signal to open the operation valve 25, so the operation chamber 17 of the open valve 6 is operated.
The hydraulic pressure is discharged from the drain pipe 36 through the secondary operation chamber 17a, the hydraulic pressure is reduced, and the open valve 6 is opened by the hydraulic pressure on the primary side 8. On the other hand, the pressure liquid on the primary side 8 flows through the secondary side 7 to the secondary side piping 5 and the piping 32 by means of pressurizing means such as a pressure air tank (not shown), and the pressure switch 34 is activated to open the open valve on the receiver panel 3. Notify the opening of 6.

When the hydraulic pressure on the secondary side 7 exceeds the set pressure of the pressure regulator R, the flamm 29 and needle 27 are pushed to the left, the valve opening adjustment hole 26 is narrowed, and the operation chamber 17 is The drained liquid decreases, and the valve element 15 throttles the valve seat 14 due to the hydraulic pressure on the secondary side 7 and the spring 18. When the fluid pressure on the secondary side 7 falls below the set pressure of the pressure regulator R, the needle 27 is returned by the secondary pressure setting spring 28, the valve body opening adjustment hole 26 is opened, and the pressure fluid in the operation chamber 17 is The liquid is drained through the operation secondary chamber 17a, and the valve body 15 is returned by the liquid pressure on the primary side 8, the valve seat 14 is opened, and the extinguishing liquid on the primary side 8 is introduced into the secondary side 7. The hydraulic pressure is restored,
In this way, the hydraulic pressure on the secondary side 7 is adjusted to be reduced to a predetermined pressure necessary for fire extinguishing activities with respect to the hydraulic pressure of the extinguishing liquid on the primary side 8.

When the temperature at the fire point further increases, the sprinkler head 4 opens and the extinguishing liquid in the pipe 5 is released, and the liquid pressure on the secondary side 7 suddenly decreases, so that the pressurized liquid supply device 1
Based on the rate of decrease of the pressurized water from the pressurizing means such as the pressurized air tank 3, the receiver panel 3 determines whether the pressure is reduced from the orifice 38 or the sprinkler head 4, and the pressure is reduced from the sprinkler head 4. If so, the pump 10 of the pressurized liquid feeding device 13 is activated. The sprinkler head 4 and the secondary pipe 5 are filled with unpressurized fire extinguishing liquid, and unlike the conventional pre-acting sprinkler fire extinguishing equipment, there is no intervening air, so the sprinkler head 4 is opened at the same time. The extinguishing liquid was released and there was no delay in extinguishing the fire.

After the release valve 6 is opened, the orifice 3
Although a part of the extinguishing liquid is drained from 8, since the opening area is small, only a small amount of liquid is drained, and there is almost no problem with the extinguishing operation. It is not necessary in the embodiment, and the equipment cost is low. Compared to conventional pre-acting sprinkler fire extinguishing equipment, it can be implemented with an extremely simple structure such as adding an orifice 38 to the secondary side piping 5, and the equipment cost is high. do not become. The fluid pressure on the primary side 8 is always reduced to a predetermined pressure by the pressure regulator R and supplied to the next side piping 5, etc., so the secondary side piping 5, sprinkler head 4, valves, etc., and the secondary side piping system. It is sufficient that the pressure resistance grade of the equipment components is sufficiently low, the cost of piping materials is low, and the piping work is simple and easy to implement, making the sprinkler fire extinguishing equipment easy to implement.

FIG. 3 is an explanatory diagram showing an enlarged main part of a second embodiment of the present invention. In this second embodiment, a float valve 65 is used as the closing means C, and the structure other than this is the same as the first embodiment, so the same reference numerals are given to the structure. The explanation was omitted. The illustrated float valve 65 has a small hole 66 and a stopper 67 provided in the rising part 37 between the hydraulic pressure intake pipe 64 of the pressure transducer 63 and the lower electrode rod 58b. It consists of a float 68 that floats.

When filling the liquid, the extinguishing liquid flows from the main pipe 51 to the small hole 66.
The float 68 is stopped by the stopper 67 as shown by the solid line in FIG.
When the liquid level inside drops, the float 68 descends and the small hole 66 is closed by the float 68 as shown by the two-dot chain line in FIG. Therefore, when the sprinkler head 4 in the center of FIG. 1 is opened due to a mechanical shock and some fire extinguishing liquid is released from this sprinkler head 4 and the liquid level drops, the float 68 causes the fire extinguishing liquid above the sprinkler head 4 to be released. Since the liquid cannot flow down, the extinguishing liquid remains below the float valve 65.
Air flows into the rising part 37 from the drain pipe 39 that is open to the atmosphere.
Entry into the interior is prohibited. As in the first embodiment, the amount of extinguishing liquid released thereby is extremely small, corresponding to the head H1 of the unwinding pipe 56 of the sprinkler head 4, and water damage is minimal. Since the float valve 65 was used as the closing means C, it was easy to carry out, but
For this closing means C, in addition to the example illustrated above, various structures having functions equivalent to these can be used.

[0025]

As described above, according to the present invention, when the sprinkler head 4 is mechanically opened, the upright portion 37
The closing means C stops this draining operation in the middle of the draining operation of the extinguishing liquid inside the riser 37, and the extinguishing liquid in the portion above the closing means C in the rising part 37 remains without being drained. The extinguishing liquid can prevent the extinguishing liquid in the secondary piping 5 from being sucked toward the open head 4 due to the siphon phenomenon, and the extinguishing liquid in the secondary piping 5 is drawn up and released. This eliminated the need for unnecessary discharge of fire extinguishing fluid, and the damage caused by water damage became extremely small.

The closing means C is capable of sending liquid from the side of the secondary pipe 5 to the side of the rising part 37, and is capable of discharging liquid from the side of the rising part 37 to the side of the base 51 of the secondary pipe 5. The check valve 61 or the float valve 65 can be easily constructed and can be implemented at low cost.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the entire sprinkler fire extinguishing equipment in a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an enlarged view of the main components in FIG. 1;

FIG. 3 is an explanatory diagram showing an enlarged view of the main components in a second embodiment of the invention.

FIG. 4 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

1 Fire detector (fire detection means) 4
Sprinkler head 5 Secondary side piping 6 Release valve 7 Secondary side 8 Primary side 13 Pressurized liquid feeding device (extinguishing liquid supply means) 37
Standing part (opening means O) 51 Main pipe (base) 61 Check valve (closing means C)

Claims (3)

[Claims] 1. A fire detection means, a closed type sprinkler head, and an open valve whose primary side and secondary side are always closed and opened when a fire phenomenon is detected by the fire detection means, in a warning area. The primary side piping of the open valve is connected to a fire extinguishing liquid supply means, the secondary side piping is connected to a closed type sprinkler head, and an opening means opening to the atmosphere is provided at a rising part of the secondary side piping. In a sprinkler fire extinguishing system, in which the secondary piping and rising part are filled with unpressurized extinguishing liquid during fire monitoring, the extinguishing liquid in the rising part of the secondary piping is A sprinkler fire extinguishing system characterized in that a closing means is provided in the middle of the upright part to close the opening means when liquid is drained from the base side. 2. The closing means is configured to allow liquid to be sent from the secondary piping side to the rising part side, and to prevent liquid from draining from the rising part side to the base side of the secondary piping. 2. The sprinkler fire extinguishing equipment according to claim 1, wherein the sprinkler fire extinguishing equipment is a check valve. 3. The closing means is configured to allow liquid to be sent from the secondary piping side to the rising part side, and to prevent liquid from draining from the rising part side to the base side of the secondary piping. 2. The sprinkler fire extinguishing equipment according to claim 1, wherein the sprinkler fire extinguishing equipment is a float valve having a shape.