JP2007020997A - Fire-extinguishing system using preoperative valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide fire-extinguishing system using a preoperative valve where malfunction of an alarm is reduced. <P>SOLUTION: The fire-extinguishing system using the preoperative valve is provided with: a primary-side piping provided with a water tank and a secondary side piping provided with a sprinkler head; a primary side valve chamber communicating with the primary-side piping and a secondary side valve chamber communicating with the secondary-side piping; a valve means capable of opening and closing an opening part communicating with both of the valve chambers; and a control chamber provided on the rear face side of the valve means. The primary side valve chamber and the secondary side valve chamber are connected through a bypass pipe, and a first stop valve capable of closing the pipe is included. A detection pipe is connected on the downstream side of the first stop valve at the bypass pipe, and the control chamber is connected with the pipe for detection through a control pipe. A second stop valve opened based on fire detection by a fire sensor is provided on the down stream side of the connection part of the control pipe of the detection pipe, and a flowing water detection means is provided between the connection part of the control pipe at the detection pipe and the second stop valve to generate an alarm signal by the detecting operation of the flowing water detection means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fire extinguishing equipment using a pre-actuating valve suitable for use in sprinkler equipment such as office buildings, apartment houses, and hotels.

  2. Description of the Related Art Conventionally, various types of fire extinguishing equipment using a pre-actuating valve (two-step valve) have been proposed for sprinkler equipment in general office buildings. Here, the pre-actuated valve refers to a valve that operates in such a fire extinguishing facility for the first time by two operations of operation of a fire detector by heat and firing (opening) of the sprinkler head by heat. As a fire extinguishing equipment using such a pre-actuated valve, those shown in Patent Document 1, Patent Document 2, and the like have been proposed.

  In the fire extinguishing equipment of Patent Document 1, when a sprinkler head fires, it is determined that a fire sensor is activated after a certain period of time has elapsed, and a solenoid valve is opened based on the operation of the fire sensor. The main valve is opened, and the operation alarm pressure switch is turned on by fire extinguishing water flowing into a signal water intake provided in the valve seat, thereby causing a fire alarm.

  The fire extinguishing equipment of Patent Document 2 opens the remote start valve based on the operation of the fire sensor and opens the pre-actuation valve. When the sprinkler head is opened along with the operation of the fire sensor, the fire extinguishing system is turned off via the pre-actuation valve Water is supplied to the sprinkler head, and the water flow due to the water discharge is detected by a water flow detection switch in the secondary side pipe to generate a water flow detection signal, thereby generating a fire alarm.

JP 2001-112882 A ("0036"-"0038")

JP 2003-290382 A (“0010”-“0012”)

  By the way, since the thing of the said patent document 1 detects a pressure change with the pressure switch for alarms via the signal water intake provided in the valve seat, and issues a fire alarm, for some reason, the valve body and the valve If foreign matter enters between the seats, fire extinguishing water may flow into the intake and malfunction. That is, there is a problem that the fire alarm sounds due to the foreign matter or the like even though the fire detector or the sprinkler head is not operating at all.

  In addition, the flow detection switch for generating a signal is provided in the secondary side pipe in the above-mentioned Patent Document 2. Therefore, for example, when only the fire detector malfunctions and the sprinkler head does not open, the flow detection switch operates. There is a problem that an alarm cannot be issued.

  The present invention has been made in view of the above-described conventional problems, and is capable of suppressing malfunctions due to foreign matters and the like, and using a pre-acting valve capable of reliably reporting malfunctions of fire detectors and sprinkler heads. The purpose is to provide.

In order to achieve the above object, the present invention
First, a primary side pipe provided with a water storage tank, a secondary side pipe provided with a sprinkler head, a primary side valve chamber communicating with the primary side pipe, and a secondary side valve chamber communicating with the secondary side pipe A fire extinguishing equipment using a pre-acting valve comprising: a valve means capable of opening and closing an opening communicating with both valve chambers; and a control chamber provided on the back side of the valve means, The primary valve chamber and the secondary valve chamber are connected by a bypass pipe and a first on-off valve capable of closing the bypass pipe is provided, a detection pipe is connected to the bypass pipe, and the control chamber and the above The detection pipe is connected to the detection pipe by a control pipe, and a second on-off valve is provided on the downstream side of the detection pipe connecting portion of the detection pipe based on the fire detection of the fire detection means. Between the connecting portion of the control pipe and the second on-off valve The water detection means is provided, is formed using the fire extinguishing system with a pre-actuated valve, characterized in that those configured to emit an alarm signal on the basis of the water flow detection operation of the flow water sensing means.

  Therefore, in a fire warning state in which the pre-acting valve (1), the bypass pipe (17) and the detection pipe (17a) are filled with fire extinguishing water (the first on-off valve (18) is closed), the fire detection means (S) When the second on-off valve (20) is opened based on the fire detection operation, fire extinguishing water in the control room (9 ′) is discharged to the detection pipe (17a) through the control pipe (22). Thus, the water flow detecting means (19) detects the water flow and generates an alarm signal, and an alarm sound can be generated by the signal. Further, the valve means (13a) of the pre-actuating valve (1) opens as the pressure in the control chamber (9 ') decreases. When the sprinkler head (7) fires, the fire extinguishing water on the secondary side is discharged from the head and passes through the pre-actuating valve (1) opened from the primary side to the secondary side as the secondary pressure decreases. Fire extinguishing water flows in and fire extinguishing work is performed. Even if foreign matter or the like enters the pre-actuated valve (1) and the valve means (13a) is opened in the fire warning state, no water flow occurs in the detection pipe (17a), and the water flow detection means (19) Do not work. Therefore, it is possible to prevent a malfunction such as an alarm sound even though the fire detection means (S) does not operate at all. The detection pipe (17a) is preferably connected to the downstream side of the first on-off valve (18) in the bypass pipe (17).

  Second, the bypass pipe is provided with a pressure switch for detecting a pressure drop in the secondary valve chamber of the pre-actuating valve, and an alarm signal is generated based on the detection operation of the pressure switch. It is comprised by the fire extinguishing equipment using the pre-acting valve of the said 1st characterized by these.

  When the sprinkler head (7) fires, the fire extinguishing water on the secondary side of the pre-actuating valve (1) flows out from the head (7), but the first on-off valve (18) is closed in a fire alarm state. Thus, it is possible to prevent the primary fire extinguishing water from flowing out to the secondary side via the bypass pipe (17). At this time, based on the pressure drop in the secondary valve chamber (9) of the pre-actuating valve (1), the pressure switch (PS2) can be operated to generate an alarm signal, and an alarm sound is generated by the signal. Can do. Therefore, for example, it is possible to reliably notify a malfunction of only the sprinkler head.

  Third, the pre-actuating valve according to the first or second aspect, wherein the valve means of the pre-acting valve is always urged toward the opening by an elastic body to close the opening. It consists of fire extinguishing equipment using valves.

  Fourth, the pre-operation according to any one of the first to third aspects, wherein the second on-off valve is an electrically operated valve that is automatically opened based on a fire detection operation by the fire sensing means. It consists of fire extinguishing equipment using valves.

  The motor-operated valve is preferably configured by an on-off valve whose opening degree can be adjusted by electric drive, but can also be configured by an electromagnetic valve.

  In addition, although the code | symbol in embodiment was shown in parenthesis corresponding to the structure of this invention, this is displayed for convenience in order to clarify the correspondence, Comprising: The structure of this invention is in embodiment. The configuration is not limited.

  According to the present invention, even if a foreign object or the like is caught in the valve means of the pre-actuating valve for some reason in the fire warning state, the flowing water detection means will not operate even if the valve means is opened. In the non-operating state, the alarm sound does not sound erroneously due to the cause of the foreign matter or the like, so that the false alarm sound can be suppressed as much as possible.

  Similarly, even if a foreign object or the like is caught in the valve means of the pre-acting valve for some reason and the valve means is opened for some reason, the sprinkler head does not operate because the pressure switch of the bypass pipe does not operate. In the non-operating state, the alarm sound does not sound erroneously due to the cause of the foreign matter or the like, so that the false alarm sound can be suppressed as much as possible.

  In addition, when a fire detector or a sprinkler head malfunctions in a fire alarm state, an alarm signal can be reliably issued to notify the malfunction.

  Hereinafter, the fire extinguishing equipment using the pre-actuating valve according to the present invention will be described in detail.

  1 and 2, reference numeral 1 denotes a pre-actuating valve (so-called two-step valve) in a fire extinguishing facility according to the present invention, which is disposed on each floor of an office building, for example. A primary side pipe 3 is connected to the primary side of the pre-actuating valve 1 via a ball valve 2. For example, a water storage tank F installed in the basement or machine room of an office building is connected to the end portion of the primary side pipe 3 via a pressurized water supply pump P1 and a pressure holding pump P2. The end of the pipe 3 is connected to a pressure tank T and a pressure switch PS1 that can detect a pressure drop in the pipe 3 via the pressure tank T.

  A secondary side pipe 4 is connected to the secondary side of the pre-actuating valve 1, and a sprinkler pipe 5 is connected to the secondary side pipe 4. A plurality of branch pipes 6 are connected to the sprinkler pipe 5, and a sprinkler head 7 is connected to the tip of each branch pipe 6. A plurality of fire detectors S are arranged in the vicinity of the sprinkler head 7. Reference numeral 5 'denotes a drain pipe connected to the sprinkler pipe 5, and a drain test valve 36 is connected to the end of the drain pipe 5'.

  The pre-acting valve 1 is formed with a primary valve chamber 8 communicating with the primary pipe 3 via the ball valve 2 and a secondary valve chamber 9 communicating with the secondary pipe 4. The valve chambers 8 and 9 are partitioned by a partition wall 11 in which a longitudinal opening 10 that communicates the primary valve chamber 8 and the secondary valve chamber 9 is formed. A valve seat 10a to which a valve body 13a described later is in close contact is formed on the peripheral edge of the vertical opening 10 on the secondary valve chamber 9 side. Further, in place of the ball valve 2, a butterfly valve, a gate valve or other valve opening / closing means may be used. Hereinafter, the valve housing of the pre-actuating valve 1 is denoted by reference numeral 1a.

  A part of the secondary valve chamber 9 of the valve housing 1 a of the pre-acting valve 1 has an opening 9 a formed therein, which has a structure that can be sealed with a lid 12.

  13 is a hollow cylindrical main valve element that can open and close the opening 10 from the secondary side in the secondary valve chamber 9, and a flat valve element that can be in close contact with the valve seat 10a at the tip ( A valve means) 13a is formed, and an annular protrusion 13b that can be inserted and fitted into the opening 10 to close the opening 10 is provided.

  The other end portion of the main valve body 13 opposite to the valve body 13a is open, and the peripheral edge of the open end is fixed to the inner peripheral edge of a diaphragm 14 (described later). A spring support projection 13c is provided at the center of the main valve body 13 inside the valve body 13a toward the other end opening portion.

  Reference numeral 14 denotes the stepped annular diaphragm, which is made of an elastic body such as rubber. The outer periphery of the diaphragm 14 is located at the periphery of the attachment port 9 a, and the attachment port 9 a is closed by the lid body 12 to close the attachment port 9 a by the outer periphery of the lid body 12. Closely fixed to the periphery. As described above, the diaphragm 14 has the main valve element 13 fixed to the inner peripheral edge thereof, and supports the main valve element 13 so as to be slidable in the directions of arrows A and B in this state.

  Reference numeral 15 denotes a rod provided on the inner surface side of the lid body 12 so as to protrude into the main valve body 13, and the tip of the rod 15 is connected to the main valve body 13 via the central hole of the diaphragm 14. Located in the center of the interior.

  Reference numeral 16 denotes a spring (elastic body) provided in the main valve body 13 and between the rod 15 and the spring support projection 13c. One end of the lid 12 side is locked to the rod 15 by 15a. The main valve body 13 is always urged against the rod 15 in the direction of the primary valve chamber 8 (arrow A direction). Accordingly, the valve body 13a at the tip of the main valve body 13 is brought into close contact with the valve seat 10a by the hydraulic pressure acting on the diaphragm 14 and the urging force of the spring 16 in the control chamber 9 ', thereby causing the pre-operation. The valve 1 is configured to maintain the valve closed state at all times.

  Here, a space isolated from the secondary valve chamber 9 is formed inside the diaphragm 14 and the main valve body 13, and the space is referred to as a control chamber 9 '.

  Reference numeral 17 denotes a bypass pipe connected to communicate the primary side valve chamber 8 and the secondary side valve chamber 9. The bypass hole 17 a penetrates the primary side valve chamber 8 and connects to the secondary side valve chamber 9. It is connected to the connecting hole 9a that penetrates. The bypass pipe 17 has a function of maintaining the primary valve chamber 8 and the secondary valve chamber 9 at the same pressure during a fire alarm. The bypass pipe 17 is connected to a detection pipe 17a through a branch point a downstream from a water filling valve 18 described later, and the detection pipe 17a passes a water flow only in the direction of the orifice 18a and the arrow C. A check valve 18b, a water flow detector 19, and an electric valve 20 are connected.

  18 is a water filling valve (first opening / closing valve) provided in the bypass pipe 17, and is filled with extinguishing water on the primary valve chamber 8 side of the pre-actuating valve 1 in the closed state, and then opened by opening the primary valve chamber. Side fire extinguishing water is supplied to the secondary valve chamber 9 of the pre-actuating valve 1 to realize a fire alarm state in which the primary side and secondary side of the pre-acting valve 1 are filled with extinguishing water. The water filling valve 18 is set to a normally closed state in such a fire warning state.

  Reference numeral 20 denotes the motor-operated valve (second on-off valve), which is connected between the downstream end of the detection pipe 17a and the discharge pipe 21. The motor-operated valve 20 is electrically opened by a drive signal from the control unit 34 based on the heat detection operation of the fire detector (fire detection means) S installed near the sprinkler head 7. The fire extinguishing water in the detection pipe 17a is discharged to the discharge pipe 21 side based on the operation of the sensor S when a fire occurs. The motor-operated valve 20 is capable of adjusting the opening degree by electric drive, and preferably has a structure capable of gradually opening and closing the valve by electric drive. However, a so-called electromagnetic valve that can be opened / closed electromagnetically is used. Also good. Various types of fire detectors can be used as the fire detection means.

  A control pipe 22 connects the control chamber 9 ′ and the detection pipe 17a. A connection port 9b penetrating the valve housing 1a in the control chamber 9 ′ and a branch b of the pipe 17a. Between. When the fire detector S detects a fire and the motor-operated valve 20 is opened, the control pipe 22 causes the fire-extinguishing water filled in the control chamber 9 'to flow out in the direction of the detection pipe 17a, and is thereby controlled. This is for opening the main valve element 13 by lowering the pressure inside the chamber 9 '.

  Reference numeral 19 denotes the water flow detector (flow water detection means) provided between the branch point b of the control pipe 22 and the motor-operated valve 20 in the detection pipe 17a. As shown in FIG. 3, the water flow detector 19 has an attachment port 23 penetrating through the detection pipe 17a, and a paddle support 24 made of an elastic body is attached to the attachment port 23 from the outside of the pipe. By attaching 25 to the pipe with bolts N from the outside of the attachment port 23, the support 24 is fixed to the pipe in a water-stopped state. At the center of the paddle support 24, there is provided a paddle support portion 24a protruding inside the pipe 17a, and a support arm 26a of the paddle 26 is horizontally supported by the support portion 24a. One end 26 a ′ of the support arm 26 a of the paddle 26 is disposed close to the detection switch 27. Thus, the paddle 26 is supported in a horizontal state by the paddle support 24, and is configured to maintain such a horizontal state even in a fire warning state in which the fire extinguishing water is filled in the pipe 17a. .

  Reference numeral 28 denotes a running water detection switch fixed outside the attachment port 23 of the pipe 17a. When the paddle 26 is rotated in the direction of arrow D by the water flow, it is turned on by contact with one end 26a 'of the support arm 26a. Thus, an alarm signal is sent to the control unit 34.

  PS2 is a pressure switch provided on the upstream side of the water supply valve 18 (between the connection hole 9a and the water supply valve 18) of the bypass pipe 17, and the secondary side by the firing (opening) of the sprinkler head 7. When the pressure drops, the pressure drop in the secondary valve chamber 9 is detected via the bypass pipe 17, and an alarm signal is sent to the control unit 34 based on the detection.

  Reference numeral 30 denotes a discharge pipe connected between the branch point c of the bypass pipe 17 and the branch point d of the discharge pipe 21, and a drain valve 31 is provided in the vicinity of the branch point c.

  Reference numeral 32 denotes a pipe connected between the branch point e of the detection pipe 17 a and the branch point f of the discharge pipe 30, and a manual start valve 33 is provided in the pipe 32.

  FIG. 4 shows the electrical configuration of the fire extinguishing equipment according to the present invention. The fire detector S, the flowing water detection switch 28, the pressure detection switch PS1, and the pressure detection are input to the control unit 34 such as a sequencer. The switch PS2 is connected, and the motor-operated valve 20, the alarm device 35, the pressurized water supply pump P1, and the pressure holding pump P2 are connected to the output unit of the control unit 34. The control unit 34 drives and controls the motor-operated valve and pump connected to the output unit based on various signals input from the input unit, and the operation will be clarified by the following description. In FIG. 1 and FIG. 2, 2a is an opening / closing handle of the ball valve 2.

The present invention is configured as described above, and the following operation of the present invention will be described.
(1) Fire warning state First, with the test valve 36, the drain valve 31, the water filling valve 18, the manual activation valve 33, and the ball valve 2 closed, the pressurized water pump P1 is driven and the ball valve 2 and the manual activation are started. When the valve 33 is opened a little, fire extinguishing water is supplied to the primary side of the pre-actuating valve 1, and the primary side including the primary side valve chamber 8 of the valve 1 is filled with the fire extinguishing water. The fire extinguishing water in the primary valve chamber 8 also flows from the bypass pipe 17 into the detection pipe 17a, fills the motor operated valve 20 and the manual start valve 33 through the orifice 18a and check valve 18b, and the control pipe. The fire extinguishing water is also filled in the control room 9 ′ from 22. The motor-operated valve 20 is kept closed.

  Next, the test valve 36 and the water filling valve 18 are opened, and fire extinguishing water is supplied to the secondary side of the pre-actuating valve 1. When the test valve 36 and the water filling valve 18 are opened, the fire water is replenished from the primary side valve chamber 8 to the secondary side valve chamber 9 via the bypass pipe 17, and further through the secondary side pipe 5 and the branch pipe 6. The fire extinguishing water is filled up to the tip of the sprinkler head 7.

  In this way, when the entire fire extinguishing equipment is filled with the fire extinguishing water, the test valve 36, the drain valve 31, the water filling valve 18, and the manual start valve 33 are closed, and the ball valve 2 is fully opened.

  By such an operation, the primary side pipe 3, the primary side valve chamber 8, the control chamber 9 ′, the secondary side valve chamber 9, the secondary side pipe 4, the pipe 5, and the branch pipe 6 are filled with fire-extinguishing water. In addition, the bypass pipe 17, the detection pipe 17a, and the pipe 32 are in a fire alert state filled with fire extinguishing water. In addition, in FIG. 1, the piping filled with fire-extinguishing water in the fire alert state is shown in black.

(2) When only the fire detector S malfunctions If the fire detector S malfunctions and the motor-operated valve 20 is driven to open by the control unit 34, the fire extinguishing water in the detection pipe 17a is converted into the motor-operated valve 20 The fire extinguishing water in the control chamber 9 ′ is also discharged in the direction of the discharge pipe 21 through the control pipe 22.

  As a result, the pressure in the control chamber 9 ′ decreases, so that the main valve body 16 is pressed in the direction of arrow B against the urging force of the spring 16 by the pressure in the primary valve chamber 8 of the pre-actuating valve 1. The opening 10 of the working valve 1 is opened. However, at this time, the sprinkler head 7 has not fired and is kept closed, so that no water flow from the primary side to the secondary side of the pre-actuating valve 1 occurs.

  At this time, in the flowing water detector 19 in the detection pipe 17a, a water flow in the direction of the motor-operated valve 20 (arrow E direction) is generated. Therefore, the paddle 26 is rotated in the arrow D direction by the water flow. Turn on. Then, the controller 34 detects that the running water detection switch 28 is turned on, and based on the detection, an alarm signal is sent from the controller 34 to the alarm device 35, and the alarm device 35 is driven by the signal and an alarm sound is emitted. . Thereby, it is possible to notify the resident or the disaster prevention center in the office building that the fire detector S has been operated.

  Thus, when only the fire detector S operates, an alarm is issued, but water is not discharged from the sprinkler head 7.

  Further, in the above-mentioned fire alarm state, the sprinkler head 7 and the fire detector S are not operated, and for some reason, foreign matter or the like is caught between the valve body 13a of the pre-actuating valve 1 and the valve seat 10a. Even if 13a is slightly opened, since the sprinkler head 7 is not firing, there is no pressure difference between the primary valve chamber 8 and the secondary valve chamber 9. Therefore, no water flow is generated in the detection pipe 17a, and the water flow detection switch 28 is not turned on. Therefore, in such a fire alarm state, when both the fire detector S and the sprinkler head 7 are not operated, an alarm sound is not erroneously generated due to a foreign matter or the like in the pre-actuating valve 1, and the alarm device 35 malfunctions. (False alarm) can be greatly reduced.

(3) When only the sprinkler head 7 is fired Next, only the sprinkler head 7 (for example, only the sprinkler head 7 ′) due to other reasons such as an impact on the head 7 due to an object coming into contact with the sprinkler head 7, etc. Fires (opens), the fire extinguishing water in the secondary valve chamber 9 of the pre-actuating valve 1 flows out from the sprinkler head 7 ′ via the secondary pipe 4, the pipe 5, and the branch pipe 6. In addition, since the filling valve 18 is closed, the fire extinguishing water on the primary side valve chamber 8 and the detection pipe 17a side is not discharged. Therefore, the valve body 13a is not opened and maintains a closed state. Accordingly, the water discharge stops when the fire extinguishing water on the secondary side of the pre-actuating valve 1 flows out from the sprinkler head 7 '.

  At this time, the pressure switch PS2 detects and turns on the pressure drop in the secondary valve chamber 9 of the pre-actuating valve 1, and the control unit 34 sends an alarm signal to the alarm device 35 based on the turning on of the switch PS2. The alarm device 35 is driven by the alarm signal. Thereby, an alarm sound is generated by the alarm device 35, and it is possible to notify the resident and the disaster prevention center in the office building that the sprinkler head 7 has been operated.

  In this way, even if only the sprinkler head 7 fires due to malfunction, only the fire extinguishing water on the secondary side of the pre-actuating valve 1 is discharged, so only a small amount of fire extinguishing water needs to be discharged. Damage can be minimized. At this time, even if foreign matter is caught between the valve body 13a and the valve seat 10a and the valve body 13a is slightly opened, the water flow from the primary side to the secondary side of the pre-actuating valve 1 is minimal. Since only a small amount of water flow is generated from the gap, the water discharge from the sprinkler head 7 'can be kept at a very small amount.

  Further, even when only the sprinkler head 7 is fired, an alarm signal can be issued, for example, the alarm 35 can be sounded reliably, and a malfunction of only the sprinkler head can be warned to a resident or a disaster prevention center in the building. it can.

  Further, in the above-mentioned fire alarm state, the sprinkler head 7 and the fire detector S are not operated, and for some reason, foreign matter or the like is caught between the valve body 13a of the pre-actuating valve 1 and the valve seat 10a. Even if 13a opens a little, since the sprinkler head 7 has not fired, the pressure in the secondary valve chamber 9 does not drop, and therefore the pressure switch PS2 does not turn on. Therefore, when neither the fire detector S nor the sprinkler head 7 is in operation, an alarm sound is not erroneously generated due to a foreign matter in the pre-actuating valve 1, and the malfunction (false report) of the alarm device 35 is greatly increased. Can be reduced.

(4) Operation at the time of actual fire When a fire actually occurs, the fire detector S first detects the heat of the fire, and the motor-operated valve 20 is driven to open via the control unit 34 based on this. Is done. Then, the fire extinguishing water in the detection pipe 17a and the control chamber 9 ′ flows out from the control pipe 22 and the pipe 17a to the discharge pipe 21 side through the motor operated valve 20.

  At this time, the paddle 26 of the water flow detector 19 is rotated in the direction of the arrow D by the water flow, whereby the water flow detection switch 28 is turned on, and the controller 34 detects this on and the fire alarm (alarm) from the alarm device 35 is detected. Sound).

  Further, since the pressure in the control chamber 9 ′ is reduced, the pressure in the primary valve chamber 8 becomes higher than the pressure in the control chamber 9 ′, so that the main valve body 13 resists the urging force of the spring 16. Then, the pre-actuating valve 1 opens in the direction of the arrow B.

  Shortly thereafter, when the sprinkler head 7 fires due to the heat of fire, the fire extinguishing water in the secondary valve chamber 9 and the secondary pipe 4, the pipe 5 and the branch pipe 6 of the pre-actuating valve 1 is discharged from the head 7 ′. The At this time, the pressure switch PS2 detects a pressure drop in the secondary valve chamber 9, and an alarm signal is issued.

  Further, since the main valve body 13 is moved backward and the pre-actuating valve 1 is opened, the fire extinguishing water in the primary valve chamber 8 and the primary side pipe 3 is also opened in the opening 10 as the secondary pressure is reduced. Flows out to the secondary side through the pressure, and the pressure in the primary side pipe 3 decreases. Here, the pressure drop of the primary side pipe 3 is detected by the pressure switch PS1 via the pressure tank T, and the control unit 34 drives the pressurized water pump P1 based on the detection to store the water in the primary side pipe 3 Supply fire-extinguishing water from F under pressure. As a result, the fire-extinguishing water that has been continuously supplied under pressure is supplied to the secondary side via the pre-actuating valve 1, and water is continuously discharged from the sprinkler head 7 to continue the fire-extinguishing operation.

  In addition, in a disaster prevention center in an office building, a first warning lamp or the like indicating that the fire detector S has been operated is turned on by an alarm signal based on the on-flow detector 19 based on the operation of the fire detector S. A second warning lamp or the like indicating that the sprinkler head 7 has been operated is turned on by an alarm signal based on turning on the pressure switch PS2 based on the firing of the sprinkler head 7, and when both of these warning lamps are turned on, It can also be configured so that it can be determined that a fire has occurred.

  As described above, according to the fire extinguishing equipment using the pre-actuating valve of the present invention, in the fire alarm state, foreign matter or the like is sandwiched between the valve body 13a of the pre-actuating valve 1 and the valve seat 10a for some reason. Even if the valve body 13a is slightly opened, the flowing water detection switch 28 and the pressure switch PS2 are not turned on. Therefore, when the fire detector S and / or the sprinkler head 7 is not operating, the alarm sound does not sound by mistake due to the foreign matter in the valve 1, and the false alarm of the alarm device 35 can be suppressed as much as possible. it can.

  Further, even when only the fire detector S malfunctions in the fire alarm state, or when only the sprinkler head 7 malfunctions, an alarm signal can be issued to reliably notify the malfunction of these devices.

It is a whole lineblock diagram of fire extinguishing equipment using a pre-actuating valve concerning the present invention. It is an expanded sectional view of the pre-acting valve in equipment same as the above. It is sectional drawing of the flowing water detector in an apparatus same as the above. It is a block diagram which shows the electrical constitution in an apparatus same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Preacting valve 3 Primary side piping 4 Secondary side piping 7, 7 'Sprinkler head 8 Primary side valve chamber 9 Secondary side valve chamber 9' Control chamber 10 Opening part 13 Main valve body 13a Valve body 16 Spring 17 Bypass piping 17a Pipe 18 for detection Filling valve 19 Flowing water detector 20 Electric valve 22 Control pipe 35 Alarm PS2 Pressure switch S Fire detector

Claims (4)

A primary side pipe provided with a water storage tank and a secondary side pipe provided with a sprinkler head;
A primary side valve chamber communicating with the primary side piping, a secondary side valve chamber communicating with the secondary side piping, valve means capable of opening and closing an opening communicating with both valve chambers, and a back side of the valve means Fire extinguishing equipment using a pre-actuated valve with a control room provided,
Providing a first on-off valve that connects the primary valve chamber and the secondary valve chamber of the pre-actuating valve with a bypass pipe and can close the bypass pipe;
Connecting the detection pipe to the bypass pipe and connecting the control chamber and the detection pipe by a control pipe,
A second on-off valve that is driven to open based on the fire detection of the fire detection means is provided downstream from the connection portion of the control pipe of the detection pipe,
A flowing water detection means is provided between the connection portion of the control pipe and the second on-off valve in the detection pipe,
A fire extinguishing facility using a pre-actuating valve, characterized in that an alarm signal is generated based on a water flow detection operation of the water flow detection means.   The bypass pipe is provided with a pressure switch for detecting a pressure drop in the secondary side valve chamber of the pre-acting valve, and an alarm signal is generated based on a detection operation of the pressure switch. A fire extinguishing facility using the pre-actuating valve according to claim 1.   The pre-acting valve according to claim 1 or 2, wherein the valve means of the pre-acting valve closes the opening by being always urged toward the opening by an elastic body. Fire extinguishing equipment.   The pre-actuated valve according to any one of claims 1 to 3, wherein the second on-off valve is an electrically operated valve that is automatically opened based on a fire detection operation by the fire detection means. Fire extinguishing equipment.

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