JP4959423B2 - Sprinkler fire extinguishing equipment - Google Patents

Description

  The present invention relates to a sprinkler fire extinguishing facility.

  Conventionally, in buildings such as buildings, sprinkler fire extinguishing equipment is installed as equipment for fire. There are various types of equipment, but a so-called wet equipment using a closed sprinkler head is simple and widely used.

In order to prevent water loss when such a closed type sprinkler head malfunctions with respect to such wet type equipment, wet type pre-operated equipment linked to a fire sensor is also used.
JP-A-11-76450

  In wet pre-actuated equipment, even if the closed type sprinkler head malfunctions, as long as the pre-actuating valve that is the district valve is closed, there is no water filling from the water source, The water in the pipe is discharged when the head malfunctions. And the piping on the secondary side from the pre-actuating valve has a considerable capacity, such as when the floor area of the building is large, and is continuously discharged by the siphon effect.

Therefore, an object of the present invention is to eliminate water in the secondary side piping and eliminate water loss when the sprinkler head malfunctions.

The present invention is a dry pre-acting type comprising a pre-acting valve to which fire-extinguishing water is supplied from a water source via a primary side pipe, and a closed sprinkler head provided in a secondary side pipe from the pre-acting valve. A sprinkler fire extinguishing system, wherein the pre-operating valve is provided with a first drainage means for draining the fire-extinguishing water in the secondary side pipe by remote control, and the closed type branched from the secondary side pipe And a second drainage means for draining the fire-extinguishing water from the plumbing pipe provided on the plumbing pipe for mounting the sprinkler head.

  Further, the second drainage means includes an operation detection means by an electrode that leaves residual water at the lower end of the downpipe and conducts through the residual water.

In another aspect of the invention, the first drainage means is a three-way switching valve, which normally connects the secondary side pipe and the drainage main pipe, and is connected to the end part of the secondary side pipe in the event of a fire. The exhaust pipe and the drain main pipe are remotely operated so as to be connected to each other.

  In this invention, the fire extinguishing water is drained from the pre-actuating valve and the downpipe, and the fire extinguishing water in the secondary side pipe is almost drained, so there is almost no water loss even if the closed sprinkler head malfunctions.

  It is possible to detect the operation (malfunction) of the closed-type sprinkler head by forming the residual water in the downpipe and checking the conduction.

Further, in another invention, in the event of a fire, the air in the secondary side pipe is exhausted with the inflow of the fire water, and the secondary side pipe can be quickly filled with the fire water without being disturbed by the air. .

Embodiment 1
FIG. 1 is a system diagram schematically showing a configuration of a pre-actuating valve in a first embodiment utilizing the present invention, and FIG. 2 is a pipe for explaining an installation state of an exhaust pipe with respect to the pre-acting valve of FIG. It is a system diagram.

  In the figure, although 1 is not shown in detail, a primary side pipe connected to a water supply main pipe to which pressurized water is supplied from a water source via a pressure supply device, 2 is a pre-acting valve main valve, 3 is a pre-acting valve main valve 2 Secondary side pipes arranged on the secondary side, 4 is provided in the piping system connected to the secondary side pipe 3, and is a three-way switching valve that is remotely operated and used for remote drainage and exhaust, 5 is a drainage main pipe , 6 is an exhaust pipe which is a small diameter pipe communicating with the end portion of the secondary side pipe 3, etc., as shown in FIG.

  Reference numeral 7 is a pressure-regulating pilot valve that detects the pressure of the fire-extinguishing water in the secondary side pipe 3 and controls the opening of the main valve 2 to adjust the secondary side pressure to a predetermined pressure. An actuated electric valve that activates the opening of the main valve 2 and a pressure switch 9 for detecting the inflow of fire-extinguishing water into the secondary pipe 3. Reference numeral 10 denotes a plurality of closed sprinkler heads connected to the secondary pipe 3.

  The three-way switching valve 4 is an electric ball valve, and the secondary side pipe 3 is always connected to the drainage main pipe 5, and the exhaust pipe 6 is drained during fire extinguishing activities in the event of a fire. It connects with the main pipe 5, exhausts the air in the secondary side piping 3 at the time of water-filling of fire-extinguishing water, and waters early fire-extinguishing water.

  FIG. 3 is a cross-sectional view showing a configuration of a portion where the closed sprinkler head 10 is connected to the downpipe 11 branched from the secondary side pipe 3.

  In the figure, a closed type sprinkler head 10 is connected to the tip of a down tube 11, and a drain pipe 12 and a pair of current monitoring electrodes 13A and 13B are provided on the front side of the head 10. Yes.

  The drainage pipe 12 is formed in a substantially inverted J shape, and its tip 21 is inserted into the downpipe 11 and is disposed so as to open downward with respect to the downward flowing water direction. Further, a drainage mechanism W is formed at the rear end portion 22, and is disposed on the upper side of the ball 23, a SUS ball 23, a spring 24, a ball receiving portion 26 having an opening 25 that is normally sealed by the ball 23, and the ball 23. And a spring holding portion 27 for holding the spring 24 is formed. The drainage mechanism W can drain the fire-extinguishing water from the downpipe 11 by pushing up the ball 23 by inserting a wire or the like through the opening 25.

  Further, as shown in FIG. 3, the downpipe 11 to which the sprinkler head 10 is connected is provided with a water draining mechanism W, and the remaining water that cannot be drained by the water draining mechanism W is used to form the sprinkler. A pair of electrodes 13 is installed as a detection mechanism for detecting the operation of the head 10.

  As long as the sprinkler head 10 is a closed type and the head 10 is not operated and opened, the pair of electrodes 13 can retain residual water at the tip portion of the downpipe 11 and flow current if there is residual water. it can. Then, by constantly supplying a current between the pair of electrodes 13, it can be detected that no current is generated, and the operation of the sprinkler head 10 due to the discharge of residual water can be detected.

In the first embodiment configured as described above, after the equipment is installed, the start valve 8 is opened for confirmation once, the main valve 2 is opened, and the fire water in the secondary side pipe 3 is opened. Is filled up to the tip of the downpipe 11. At this time, it can be confirmed that the secondary side pipe 3 can be maintained at a predetermined pressure so that the secondary side pipe 3 has no problems such as leakage.

  Then, by closing the start valve 8 and stopping the filling of the fire extinguishing water to the secondary side pipe 3, by controlling the three-way switching valve 4 and connecting from the secondary side pipe 3 to the drain main pipe 5, Drain the fire-extinguishing water from the pre-actuating valve side in the secondary pipe 3. Further, in the downpipe 11 of each sprinkler head 10, a wire (not shown) is inserted into the drain pipe 12 from the opening 25, the ball 23 is pushed up, and the fire-extinguishing water in the downpipe 11 is drained. By these drainage, there is almost no fire extinguishing water in the secondary side pipe 3.

  And the remaining water is hold | maintained below the front-end | tip 21 of the drain pipe 12 at the front-end | tip part of each fall pipe | tube 11, The operation | movement of each sprinkler head 10 is always carried out with the electric current of a pair of electrode 13 as a detection mechanism. Is monitored.

  In this state, even if the sprinkler head 10 is accidentally opened accidentally, such as receiving an impact, the fire-extinguishing water is hardly discharged and no significant water loss occurs.

  Next, when a fire occurs in the sprinkler fire extinguishing equipment that has been monitored in this way, a fire detector (not shown) detects the heat or smoke from the fire and generates a fire signal, and a pre-operation is performed based on the fire signal. The valve starting valve 8 is opened. Based on the opening of the start valve 8, the main valve 2 can be opened. Since the secondary side is empty, the main valve 2 is opened and fire-extinguishing water flows into the secondary side pipe 3.

  At this time, a narrow exhaust pipe 6 is connected to the end portion of the secondary side pipe 3, the other end side of the exhaust pipe 6 is connected to the three-way switching valve 4, and the exhaust pipe is controlled by controlling the three-way switching valve 4. 6 is connected to the drain main 5 so that the air in the secondary side pipe 3 is exhausted together with the inflow of the fire water, and the secondary side pipe 3 is quickly filled with the fire water without being disturbed by the air. Can be watered.

  The secondary side pipe 3 is filled with water by opening the valve 2 so that the secondary side pipe 3 is filled with a predetermined pressure based on a pressure regulating function not explained in detail of the pressure regulating pilot valve 7. The valve 2 is closed when the pressure in the secondary side pipe 3 reaches a predetermined pressure.

  If the closed-type sprinkler head 10 is not thermally opened in this state, no fire-extinguishing water is released, and if the head 10 is thermally opened based on the thermal air current of the fire, the fire-extinguishing water is released. In other words, when the fire detector is not shown in the figure, or when the fire detector is turned off, it is not necessary to discharge water wastefully, and when both the fire detector and the sprinkler head 10 are activated, the fire water discharge is started. It is a reliable system of stages.

  Here, regarding the state of the exhaust pipe 6 by the three-way switching valve 4, if the exhaust pipe 6 is a thin pipe and flowing water from there does not affect the filling of the secondary side pipe 3, the exhaust pipe 6 is connected to the drain main pipe. It can be connected to 5. However, when the amount of flowing water from the three-way switching valve 4 is large, the three-way switching valve 4 is closed when a fire signal is generated.

  As described above, in this embodiment, the pre-acting valve 2 to which the fire extinguishing water is supplied from the water source via the primary side pipe 1 and the closed sprinkler head provided in the secondary side pipe 3 from the pre-acting valve 2. 10 is a pre-actuated sprinkler fire extinguishing facility comprising a three-way switching valve 4 (first drainage means) that is provided in the pre-actuating valve 2 and drains the fire-extinguishing water in the secondary side distribution 3-pipe. A drainage mechanism W (second drainage means) that is provided in a downpipe 11 for branching from the secondary side pipe 3 and for attaching a closed type sprinkler head 10 and drains fire-extinguishing water from the downpipe 11; It is equipped with.

  As a result, the fire extinguishing water is drained from the pre-actuating valve 2 and the downpipe 11 and the fire extinguishing water in the secondary side pipe 3 is almost drained, so that there is almost no water loss even if the closed sprinkler head 10 malfunctions. .

  Furthermore, it is possible to detect the operation (malfunction) of the closed-type sprinkler head 10 by forming the remaining water that cannot be removed by the drainage mechanism W at the tip portion of the downpipe 11 and checking the conduction. ing.

Embodiment 2
FIG. 4 is a cross-sectional view showing a configuration of a portion in which the closed sprinkler head 10 is connected to the falling pipe 11 branched from the secondary side pipe 3 in the second embodiment using the present invention. Shows the time of water discharge in FIG. 4, and FIG. 6 shows the time of recovery in FIG. In this embodiment, the entire system is configured in the same manner as in the first embodiment, the same reference numerals are given to the same members as those in the first embodiment, and the configurations and functions are the same, and the detailed description is omitted. Description is omitted. In the configuration of the pre-actuating valve, the three-way switching valve 4 and the exhaust pipe 6 may not be provided.

  In the figure, similarly to the first embodiment, a closed sprinkler head 10 is connected to the tip of the downpipe 11, and a closing lever 31 and the closing lever 31 are locked on the front side of the head 10. A closing mechanism H is constituted by the lock key 32 to be operated.

  The closing lever 31 is rotatably supported at its proximal end by a shaft 33, and is normally locked at its distal end by a lock key 32, and closes with the falling pipe 11 as a flow path. The lock key 32 is put in and out by the driving device 34, and protrudes into the downpipe 11 or retreats from the position, and the position is controlled. When the lock key 32 is moved backward by the driving device 34, the locking state of the closing lever 31 is released, and the closing lever 31 is opened as shown in FIG.

  The position control of the lock key 32 is reversely operated based on a fire signal from a fire detector (not shown) as in the case of the start valve 8 of the pre-actuating valve, and the recovery is performed as shown in FIG. Using a tool such as the above, with the closing lever 31 pushed up, a recovery input is made from the surface of the control panel (not shown), and the lock key 32 is projected to the original position.

  In the second embodiment configured as described above, after the equipment is installed, as the wet equipment, the start valve 8 is opened, the main valve 2 is opened, and the fire-extinguishing water is placed in the secondary pipe 3. It is filled with water up to the portion of the closing lever 31 at the tip of the downpipe 11. At this time, it can be confirmed that the secondary side pipe 3 can be maintained at a predetermined pressure so that the secondary side pipe 3 has no problems such as leakage.

  And the starting valve 8 is closed and charging of the fire-extinguishing water to the secondary side piping 3 is stopped. It should be noted that, for filling water into the secondary side pipe 3, it is possible to use a filling / pressure-regulating pilot valve equipped with a bypass pipe to constantly adjust and charge water without opening the main valve 2. . Here, the pressure regulation pilot valve 7 has only an automatic pressure regulation function, and the pressure in the secondary side pipe 3 is not controlled in detail.

  Moreover, the closing lever 31 may be temporarily opened at the tip portion of each falling pipe 11 to fill up with water below the closing lever 31, and a pair of electrodes 13 as in the first embodiment is provided there as a detection mechanism. Similarly, the operation of each sprinkler head 10 may be constantly monitored.

  Even if the sprinkler head 10 is inadvertently opened accidentally in such a state as being subjected to an impact, the fire-extinguishing water is hardly discharged by the closing lever 31 and a large water loss does not occur.

  Next, when a fire occurs in the sprinkler fire extinguishing equipment that has been monitored in this way, a fire detector (not shown) detects the heat or smoke from the fire and generates a fire signal, and a pre-operation is performed based on the fire signal. The valve starting valve 8 is opened. At the same time, the driving device 34 is controlled, the lock key 32 is retracted, and the closing lever 31 is opened. The main valve 2 can be opened based on the opening of the start valve 8.

  At this time, the closing lever 31 is open at the end portion of the secondary side pipe 3, and the fire extinguishing water is filled up to the sprinkler head 10.

  As in the first embodiment, the secondary side pipe 3 is filled with a predetermined pressure in the secondary side pipe 3 based on a pressure regulation function not described in detail of the pressure regulation pilot valve 7. When the opening of the main valve 2 is adjusted so that the pressure in the secondary side pipe 3 reaches a predetermined pressure, the main valve 2 is closed.

  If the closed-type sprinkler head 10 is not thermally opened in this state, no fire-extinguishing water is released, and if the head 10 is thermally opened based on the thermal air current of the fire, the fire-extinguishing water is released. In other words, when the fire detector is not shown in the figure, or when the fire detector is turned off, it is not necessary to discharge water wastefully, and when both the fire detector and the sprinkler head 10 are activated, the fire water discharge is started. It is a reliable system of stages.

  Therefore, if there is no fire signal from a fire detector (not shown), the closing lever 31 closes the conduit of the downpipe 11, and if the sprinkler head 10 is accidentally opened instead of a fire, there is little discharge of fire extinguishing water. Only when the extinguishing water is filled below the closing lever 31, the extinguishing water of that portion is only discharged. For this reason, there is almost no water loss in case of accidental opening.

  Then, when the restoration work is performed after the fire extinguishing activity is completed, the driver 35 is inserted into the gap with the ceiling plate on which the sprinkler head 10 is installed as shown in FIG. 6, and the closing lever 31 is pushed up manually. Then, the position of the lock pin 32 is protruded, returned to the original position, and the closing lever 31 is locked in the closed state.

  As described above, in this embodiment, the pre-acting valve 2 to which the fire extinguishing water is supplied from the water source via the primary side pipe 1 and the closed sprinkler head provided in the secondary side pipe 3 from the pre-acting valve 2. 10 is a pre-acting type sprinkler fire extinguishing equipment, and includes a closing lever 31 and a lock pin for shutting off the fire extinguishing water on a down pipe 11 for branching from the secondary side pipe 3 to attach the sprinkler head 10 32 is provided with a closing mechanism H (closing means).

  As a result, the fire-extinguishing water is sealed off from the downpipe 11 and the fire-extinguishing water in the secondary side pipe 3 is not released, so that there is no water loss even if the closed sprinkler head 10 malfunctions.

  Furthermore, the closing lever 31 is once opened at the leading end portion of the downpipe 11 (up to the lower end), filled with water, and the continuity of the fire extinguishing water is observed (operation detection means), similar to the first embodiment. In addition, the operation (malfunction) of the closed sprinkler head 10 can be detected.

The systematic diagram of the pre-acting valve in 1st Embodiment. FIG. 2 is a piping system diagram of an exhaust pipe in FIG. 1. Sectional drawing of the fall pipe in 1st Embodiment. Sectional drawing of the fall pipe in 2nd Embodiment. Sectional drawing at the time of water discharge of the fall pipe in FIG. Sectional drawing at the time of the restoration | recovery of the fall pipe in FIG.

Explanation of symbols

  2 Pre-actuating valve, 4 Three-way valve switching valve, 10 Sprinkler head, 11 Falling pipe, 13 pair of electrodes, H closing mechanism, W draining mechanism

Claims (3)

A dry- type pre-acting sprinkler fire extinguishing system comprising a pre-acting valve to which fire-extinguishing water is supplied from a water source via a primary side pipe, and a closed-type sprinkler head provided in a secondary side pipe from the pre-acting valve Because
A first drainage means provided on the pre-actuating valve for draining the fire-extinguishing water in the secondary side pipe by remote control ;
A second drainage means for branching off from the secondary side pipe and provided in a downfall pipe for attaching the closed type sprinkler head to drain the fire-extinguishing water from the downfall pipe;
Sprinkler fire extinguishing equipment characterized by comprising: The second drainage unit, the riser leaving the remaining water to the lower end of the down tube, sprinkler fire extinguishing facility according to claim 1, further comprising a sprinkler head operation detecting means by the electrode for conduction through the remaining water. The first drainage means is a three-way switching valve, which normally connects a secondary side pipe and a drain main, and in the event of a fire, a small-diameter exhaust pipe and a drain main connected to the end of the secondary side pipe The sprinkler fire extinguishing equipment according to claim 1, wherein the sprinkler fire extinguishing equipment is remotely operated so as to be connected to each other.

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