JP2008029876A - Flow water detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flow water detector, replacing packing or the like in a short time and having excellent maintainability. <P>SOLUTION: In this flow water detector, the interior of a valve casing is partitioned into an upstream chamber connected to the water supply side and a downstream chamber connected to the sprinkler head side by a partition, a communicating opening is bored in the partition, and the downstream side is provided with a freely opening and closing valve element. The valve element has a lift valve structure adapted to slide up and down along the inner wall of the valve casing, and has a control chamber formed between a lid provided on an extension of the valve casing inner wall where the valve element slides. Opening of the valve element is detected to generate a flow water detection signal. A connecting port communicated with the outside through the control chamber is mounted in the valve casing. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a water flow detector for sprinkler equipment installed in a building.

The flowing water detection device of the sprinkler facility has a check valve structure, the primary side is connected to the water supply device, and the secondary side is connected to the sprinkler head. In the alert state, the primary side is filled with pressurized water and the secondary side is filled with pressurized fluid, and the primary side pressure and the secondary side pressure are substantially equal, and the valve body is closed.

When the sprinkler head is activated in the event of a fire and the secondary fluid is discharged from the sprinkler head, the pressure in the secondary piping will drop, and if the primary pressure exceeds the secondary pressure, the valve will open. Water flows from the primary side to the secondary side. A running water detection signal is generated by detecting the opening of the valve body.

The flowing water detection device A shown in FIG. 6 is an automatic opening / closing valve having a lift valve structure in which the valve body V slides up and down along the inner wall of the valve box, the primary side I is connected to the water source, and the secondary side II is connected to the sprinkler head Sh. The limit switch Sm provided at the tip of the lift shaft V1 projecting from the valve body V to the outside of the valve box detects the vertical movement caused by the opening and closing of the valve body V to monitor the open / closed state of the valve body. (For example, refer to Patent Document 1).
Japanese Patent Publication No. 35-16346 (page 1-2, Fig. 1)

In the flowing water detection device, the primary side I and the secondary side II communicate with each other via a space above the valve body V (hereinafter referred to as “control room”) by piping. The control chamber includes a valve body, a valve box inner wall on which the valve body slides, and an inner side of the lid F. The piping communicating the primary side I and the secondary side II is connected to the lid F. However, if the piping is not removed from the lid when the lid is opened by replacing the packing inside the valve box, etc., the lid The structure cannot be removed from the valve box.

Further, when the packing replacement work is completed, labor and time for connecting the pipe removed from the lid to the original state is required.

Therefore, an object of the present invention is to provide a flowing water detection device excellent in maintainability that can be operated in a short time when replacing packing or the like.

In order to achieve the above object, according to the first aspect of the present invention, the inside of the valve box is partitioned by a partition wall into a primary side chamber connected to the water supply side and a secondary side chamber connected to the sprinkler head side. In addition, a communicating port is formed in the partition wall, and a valve body that can be opened and closed is provided on the secondary side. The valve body has a lift valve structure that slides up and down along the inner wall of the valve box. In the flowing water detection device which has a control chamber formed between the lid provided on the extension of the inner wall of the moving valve box and the valve body and generates a flowing water detection signal by detecting the opening of the valve body, It is a flowing water detection device in which the connection port leading from the control room to the outside is installed in the valve box.

The invention according to claim 2 is the flowing water detection device according to claim 1, wherein the inside of the lid is cylindrical and protrudes toward the control chamber, and an opening is formed in the cylindrical portion. .

The invention according to claim 3 is the water flow detection device according to claim 1, wherein the connection port is disposed closer to the lid than the valve body position in the open state.

According to the first aspect of the present invention, since the connection port leading from the control chamber to the outside is provided on the valve box side, it is possible to remove only the lid when replacing the packing. This saves you the trouble of removing the pipe that leads to the lid from the lid.

According to the second aspect of the present invention, the inner side of the lid can be formed into a cylindrical shape, and the structure inside the valve box can be locked with the end surface of the cylindrical portion. Further, by providing an opening in the cylindrical portion, fluid in the control chamber can communicate with the connection port according to claim 1.

According to the third aspect of the present invention, the connection port is disposed closer to the lid than the open valve body position, so that the connection port is not blocked when the valve body slides. Is.

The connection port is preferably installed at a position closer to the lid than the inner wall portion on which the valve body slides.

Embodiments of the present invention will be described below with reference to FIGS. 1 is a system diagram of a sprinkler facility in which the water flow detection device of the present invention is installed, FIG. 2 is a cross-sectional view of the water flow detection device of FIG. 1, and FIG. 3 is a cross section of the water flow detection device immediately after the sprinkler head of FIG. FIG. 4 and FIG. 4 are cross-sectional views when the valve body of the flowing water detection device is fully opened.

As shown in FIG. 1, the sprinkler facility provided with the flowing water detection device of the present invention includes a water source 1, a water supply device 2, a flowing water detection device 3, a sprinkler head 4, and an elevated water tank W.

The water source 1 is a water tank for storing fire-extinguishing water, and the water supply device 2 is a device for pumping the fire-extinguishing water from the water source 1 to the pipe 7 and supplying it to the sprinkler head 4 connected to the end of the pipe 7. At the time of warning, the pipe 7 is filled with fire extinguishing water up to the sprinkler head 4 at the end. In addition, it is also possible to use household water supply equipment instead of the water source 1 and the water supply device 2.

As shown in FIG. 2, the flowing water detection device 3 includes a valve portion and a signal control device 6, and the inside of the valve box of the valve is partitioned into a primary side chamber I and a secondary side chamber II by a partition wall 8. A communication port 9 for communicating the primary side chamber I and the secondary side chamber II is formed.

With the secondary side chamber II side of the communication port 9 as a valve seat, a bottomed cylindrical valve body 10 is placed on the valve seat. The upper part of the valve body 10 has a flange shape, the flange side surface is slidable along the inner wall of the valve box, a horizontal groove is formed on the flange side surface, and a ring-shaped watertight member is formed in the horizontal groove. 11 is provided.

A limit switch 13 is provided in the vicinity of the tip of the rod 12 provided so as to protrude from the valve body 10 to the outside of the valve box, and the vertical movement due to opening and closing of the valve body 10 can be detected by the limit switch 13.

Specifically, the limit switch 13 uses a b contact that is turned on when an object is moved away from the actuator, and a plate P urged toward the rod 12 by the projectile S is always in contact with the actuator. Is in a state.

The plate P is pivotally supported outside the valve box and is rotatable, and an adjustment screw T is provided at the end opposite to the pivotal support portion of the plate P. The actuator of the limit switch 13 and the plate P are in contact with each other via an adjusting screw T, and fine position adjustment is possible.

When the valve body 10 is opened, the rod 12 is also moved upward, the plate P is pushed by the rod 12 and pivoted about the shaft, and the tip of the adjustment screw T of the plate P is separated from the actuator of the limit switch 13 so that the limit is reached. The switch 13 is turned on and a signal is transmitted to the signal control device 6.

A space is formed in the upper part of the valve body 10 by the inner wall of the valve box and the lid 14, and this is referred to as a control chamber 15. An elastic body 16 is provided between the valve body 10 and the lid 14 to urge the valve body 10 toward the valve seat.

The control chamber 15 has a connection port 17 that leads to the outside, and a pipe 18 that leads to the primary side chamber I and the secondary side chamber II is connected to the connection port 17. A check valve 19 capable of passing water from the primary side chamber I side to the control chamber 15 and an orifice 20 are installed in a space 18 </ b> A from the primary side chamber I to the control chamber 15. An energization shut-off valve 21 that is always open and closes when energized is provided in 18B until the next chamber II.

The diameter of the orifice 20 is set to be smaller than the valve seat diameter of the energization shut-off valve 21.

The energization shut-off valve 21 is electrically connected to the signal control device 6 and can be controlled to be opened and closed by the signal control device 6. The energization shut-off valve 21 has a structure in which the valve element is open during normal times and the internal valve element is closed only during energization. Specifically, an electromagnetic valve, a spring return ball valve, or the like is used.

The signal control device 6 can transmit signals to various devices such as transmitting a signal generated by the operation of the limit switch 13 of the flowing water detection device 3 to the control panel 30 provided in the management room. A signal is output and the opening / closing of the energization shut-off valve 21 provided in the flowing water detection device 3 is controlled.

When the sprinkler head 4 malfunctions, the energization shut-off valve 21 is closed by a water supply stop switch provided in the signal control device 6, and fire extinguishing water in the primary side chamber I is introduced into the control chamber 15, and the valve body It is possible to stop water discharge from the sprinkler head 4 by seating 10 on the valve seat.

The sprinkler head 4 is provided in a pipe connected to the secondary side chamber II of the flowing water detection device 3. The sprinkler head 4 incorporates a heat-sensitive operating mechanism that supports the valve body. The heat-sensitive operating mechanism is activated by the heat of the fire to open the valve body, and extinguish water in the secondary side II pipe. It is something to spray.

As shown in FIG. 1, the elevated water tank W is disposed on the upper part of the sprinkler facility and connected to the pipe 7 of the sprinkler facility. The elevated water tank W can supply water stored in the water tank to the pipe 7 due to a water pressure difference, and a check valve 23 is provided to prevent a backflow from the pipe 7 side to the elevated water tank W.

Next, the operation of the sprinkler facility in which the running water detection device of the above embodiment is installed will be described.

When a fire occurs, the sprinkler head 4 is actuated by the heat of the fire, and the fire extinguishing water in the pipe connected to the secondary side chamber II of the flowing water detection device 3 is ejected from the sprinkler head 4.

The piping connected to the secondary side chamber II is depressurized by the operation of the sprinkler head 4, and the amount of extinguishing water supplied from the primary side chamber I to the control chamber 15 is limited by the orifice 20. The force applied to the valve body 10 opens so that the pressure applied from the primary side chamber I exceeds the pressure in the control chamber 15 and the valve body 10 moves slightly in the opening direction, and the flow rate for the operation of the sprinkler head flows. Fire extinguishing water flows into the secondary side chamber II (see FIG. 3).

When the valve body 10 is opened, the rod 12 is also moved upward to push up the plate P, and the pivotally supported plate P is rotated away from the actuator of the limit switch 13 so that the switch is turned on. 6 outputs a signal.

The water supply device 2 is activated by the output signal from the signal control device 6, and pressurized fire extinguishing water is sent from the pipe 7 through the primary side chamber I, so that the valve body 10 moves to the fully open position (FIG. 4). reference). The fire extinguishing water sent is sprayed from the sprinkler head 4 to suppress and extinguish the fire.

As another embodiment, as shown in FIG. 5, when the fire detector is installed in the sprinkler equipment of the first embodiment and the fire detector 5 is not activated when the sprinkler head is activated, the sprinkler head 4 is It is possible to determine that a malfunction has occurred and automatically shut off the water supply to the sprinkler head 4.

The fire detector 5 is electrically connected to the signal control device 6, the control panel 30, and the like. The fire detector 5 can detect a fire by the heat or smoke of the fire and can output a fire signal to the signal control device 6 or the control panel 30. The fire detector 5 is preferably of a type that operates faster than the operation of the sprinkler head 4.

The operation of the sprinkler facility in which the flowing water detection device is installed will be described. Since the operation at the time of fire is substantially the same as that of the first embodiment, a case where the sprinkler head malfunctions other than at the time of fire will be described.

When the sprinkler head 4 is disassembled and operated due to an impact or the like, the fire extinguishing water in the pipe connected to the secondary side II flows out, and the valve body 10 of the water flow detector 3 is connected to the sprinkler head as described above. The limit switch 13 is turned on so that the flow rate for the operation flows, and the operation signal of the limit switch 13 is output to the signal control device 6.

At that time, since the fire signal is not input to the signal control device 6 from the fire detector 5, the signal control device 6 closes the energization shut-off valve 21 and allows the fire water in the primary side chamber I to flow into the control chamber 15.

When the fire extinguishing water flows into the control chamber 15, the valve body 10 slides downward and is seated on the valve seat, shuts off water flow from the primary side chamber I to the secondary side chamber II, and is caused by malfunction of the sprinkler head 4. It reduces water damage.

System diagram of sprinkler equipment in which the water flow detector of the present invention is installed 1 is a cross-sectional view of the flowing water detection device of FIG. Sectional drawing of the flowing water detection apparatus immediately after the sprinkler head of FIG. 1 act | operates Sectional view when the valve body of the water flow detector is fully open System diagram of sprinkler equipment of another embodiment in which the water flow detection device of the present invention is installed Sectional view of the flowing water detection device described in Patent Document 1

Explanation of symbols

1 Water source
2 water supply equipment
3 Flowing water detection device
4 Sprinkler head
6 Signal control device
10 Disc
12 rods
13 Limit switch
14 Lid
15 Control room
17 Connection port
P plate
S projectile
T adjustment screw

Claims (3)

The inside of the valve box is partitioned by a partition into a primary chamber connected to the water supply side and a secondary chamber connected to the sprinkler head side, and a communication port is drilled in the partition, and the secondary side opens and closes. The valve body has a lift valve structure that slides up and down along the inner wall of the valve box, and a lid and a valve body provided on the extension of the inner wall of the valve box on which the valve body slides. In the flowing water detection device that has a control chamber formed between them and generates a flowing water detection signal by detecting the opening of the valve body, a connection port that leads from the control chamber to the outside is installed in the valve box Flowing water detection device characterized by.
2. The flowing water detection device according to claim 1, wherein the inside of the lid is cylindrical and protrudes toward the control chamber, and an opening is formed in the cylindrical portion.
In the said flowing water detection apparatus, the connection port is installed in the lid | cover side rather than the valve body position of the open state, The flowing water detection apparatus of Claim 1 characterized by the above-mentioned.

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