JP3419518B2 - Sprinkler alarm - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buzzer for warning water from a sprinkler, and more particularly to a sprinkler warning device which has high sensitivity and can be activated even during a power failure. . 2. Description of the Related Art There are various known techniques relating to a sprinkler itself and a sprinkler head joint for connecting the sprinkler. On the other hand, an alarm device for notifying that the sprinkler is operating and that the vehicle is out of water has been conventionally employed. However, as in the present application, there is no device that has high sensitivity and can continue the alarm operation even during a power failure. [0003] Various water sensors are conceivable as means for detecting water output from a sprinkler. However, the water sensor needs to reliably detect a small amount of water. That is, most of the sprinklers are installed in the house, especially on the ceiling, and needless to be operated in the event of a fire. Of course, there should be no water leakage when no fire occurs. Therefore, it is necessary that the water sensor has a function of detecting a slight leak of water and a function of reliably and constantly detecting water discharge at the time of a fire or the like. on the other hand,
Generally, the water sensor is operated by an AC power supply, so that no alarm is issued during a power failure. On the other hand, a fire often occurs at the time of a power failure, so it is important that the alarm device be configured to be able to operate constantly regardless of the power failure.
In addition, it is desirable that the buzzer sound can be continued even if the detection signal of the water sensor is lost once it is generated, and it is desirable that the buzzer sound be formed in a structure that can be manually stopped at any time due to a high sound. The present invention has been made in view of the above circumstances, has high sensitivity, can continue operation even in the event of a power failure, can continue alarming even if the detection signal is released, and can operate manually. An object of the present invention is to provide a sprinkler alarm device capable of stopping an alarm. [0005] In order to achieve the above object, the present invention is an alarm device for alarming water output from a sprinkler, wherein the alarm device is supported by a ceiling plate and allows water to pass therethrough. A nozzle body having an internal passage, a sprinkler mounted below the nozzle body and falling off in the event of a fire, and a guide post housed in the nozzle body and having a lower end contacting the sprinkler and closing the internal passage at an upper surface thereof And a plunger fixed at the center of the guide post via an insulating member. A water detection circuit section having a plurality of resistors and capacitors is formed between the nozzle body and the plunger, The detection circuit is connected to the buzzer via the buzzer circuit, and a buzzer circuit is provided between the buzzer circuit and the water detection circuit even if the operation of the water sensor is stopped. A signal holding circuit unit for operating the unit is interposed. When a small amount of water adheres to the water sensor, a short circuit occurs and a detection signal is generated. This detection signal is modulated with high sensitivity by the water detection circuit section in which the resistance value (R) and the capacity (C) are adjusted to appropriate values, transmitted to the buzzer circuit section side, and sounds a buzzer. On the other hand, AC100V and a battery are connected to the power supply circuit unit, and both or any one of the power supplies is connected to each circuit unit side. Even if the water sensor is released, the detection signal is held by the signal holding circuit unit and the alarm is continued. The alarm is stopped by manual operation of the buzzer stop switch, and reset by the power-on reset circuit. The battery voltage is constantly monitored by a battery voltage monitoring circuit, and the battery charge / discharge circuit automatically charges and discharges the battery. The correctness or abnormality of the device is confirmed by a test switch. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing the structure and configuration of a water sensor and a water detection circuit of a main part of the present embodiment, FIG. 2 is a block diagram showing the overall configuration of the present embodiment, and FIG. FIG. 4 is a circuit diagram, FIG. 4 is an axial sectional view of the sprinkler in the present embodiment, and FIG. 5 is an axial sectional view showing the structure of the sprinkler of FIG. As shown in FIGS. 2 and 3, the sprinkler alarm device of this embodiment is roughly divided into a water sensor 1, a buzzer circuit 2, a water detection circuit 3, a power supply circuit 4, a signal holding circuit 5, and a buzzer. 6, a power-on reset circuit 7, a battery voltage monitoring circuit 8, a battery charge / discharge circuit 9, and the like. In addition, the power supply circuit section 4
C100V power supply 10 and battery power supply 11 are connected.
A buzzer stop switch 13 is attached to the buzzer circuit section 2, and a power lamp 14, a battery voltage drop lamp 15, and a test switch 40 are provided in the apparatus. FIG. 2 shows a detailed circuit structure of each of the circuit units 2, 3, 4, 5, 7, 8 and the like, but the description is omitted. Note that VCC in the figure is the power supply unit 10 (11). As shown in FIGS. 1 and 4, the nozzle body 17 of the sprinkler 16 is connected to a sprinkler head joint 18.
Is screwed on. The passage 20 of the nozzle body 17 communicating with the internal passage 19 of the sprinkler head joint 18 is
The guide post 22 having 1 is closed at normal times when there is no water. A plunger 23 is formed integrally with the packing 21 and the like on the guide post 22. The plunger 23 is normally insulated from the nozzle body 17 via the packing 21 and the insulating member 24. As shown in FIG. 4, the plunger 23 is disposed in contact with a lever member 25 that is locked to the nozzle body 17, and a low-melting alloy 26 and a heat collecting plate 27 are engaged with the lever member 25. Further, slits 28 and 29 for water discharge are formed in the nozzle body 17. As shown in FIG. 1 and FIG. 3, the lead wires 30 and 31 of the water detection circuit section 3 are connected to the nozzle body 17 side of the sprinkler 16 and the plunger 23,
The water sensor 1 is formed between the plunger 7 and the plunger 23. In a state where there is no water, the two are insulated from each other.
When water adheres between the plunger 7 and the plunger 23, the two are electrically conducted from the water sensor 1 to the water detection circuit 3 side by an electric signal (detection signal).
Is sent. That is, as shown in FIG. 1, the water sensor 1 is configured to be short-circuited by water to generate a sensor function. The sprinkler head joint 18 is disposed above the ceiling of a building or the like, and is connected to the sprinkler head joint 18 and the nozzle body 17.
Is fixed to the ceiling plate 33 by the connecting tool 32. The internal passage 19 of the sprinkler head joint 18 is communicatively separated by a separation rib 34 to form internal passages 19a and 19b. The internal passage 19a communicates with a water inlet pipe 35 connected to a water source (not shown), and the internal passage 19b communicates with a water supply pipe 36, respectively. In addition, both the water inlet pipe 35 and the water supply pipe 36 are arranged by screwing one end thereof to the sprinkler head joint 18. As shown in FIG. 1, the water detection circuit section 3 has a circuit configuration including lead wires 30 and 31.
The power supply circuit unit 4 and the signal holding circuit unit 5 are connected. In the circuit, resistors R ₁ , R ₂ , R ₃ , R ₄ , R ₅ , R ₆ are arranged, a capacitor C ₁ and an npn-type transistor 3 are connected.
7, 38 and 39 are arranged. Although a detailed description is omitted, in this embodiment, in particular, by adjusting the values of the resistors R ₁ , R ₂ , and R ₃ , electricity can flow in the circuit even if a very small amount of water adheres to the water sensor 1. Is adjusted to high sensitivity. Generally, the resistance value of water is about 5 KΩ, but in this embodiment, it is about 50 KΩ.
Since the circuit is configured to be turned on at KΩ and turned off at about 100 KΩ, the circuit is closed by the adhesion of an extremely small amount of water. When the heat collecting plate 27 is heated by a fire or the like, the low melting point alloy 26 melts and the lever member 25 comes off the nozzle body 17. Therefore, as shown in FIG. 5, the guide post 22 falls and engages with the nozzle body 17. As a result, the closing of the passage 20 by the packing 21 is released, the water in the internal passage 19 of the sprinkler head joint 18 enters the nozzle body 17 from the passage 20, and the slits 28, 2
It is released from 9 at once. Since a part of the released water (including the spray) adheres to the plunger 23 and the nozzle body 17, the water sensor 1 operates as described above. Next, the operation of this embodiment will be described. When the sprinkler 16 does not operate, the tap water from the water inlet pipe 35 enters the internal passage 19a as shown in FIG.
Sent to the side. Due to this series of water flows, water does not accumulate on the sprinkler 16 and so-called dead water does not occur. As shown in FIG. 2, when the power switch 12 is turned on, the AC 100
Electric power is supplied from the V power supply 10 and the battery power supply 11 to the power supply circuit section 4, and the power supply lamp 14 is turned on. This electricity is sent from the power supply circuit section 4 to the buzzer circuit section 2, the water detection circuit section 3, and the power-on reset circuit section 7. The voltage of the battery power supply 11 is constantly monitored by the battery voltage monitoring circuit section 8, and is constantly charged and discharged by the battery charge / discharge circuit section 9 to be maintained at a normal voltage state. Note that the battery voltage drop lamp 15 warns of an abnormal voltage of the battery power supply 11. As described above, when a fire or the like occurs and water is discharged from the sprinkler 16 as shown in FIG. 5, the water sensor 1 operates. A detection signal of water output by the water sensor 1 is amplified and transmitted from the water detection circuit unit 3 and transmitted to the buzzer circuit unit 2. Thereby, the buzzer 6 emits a warning sound. In the present embodiment it will be readily appreciated from anywhere for emanating the horns of the above volume 70 dB. The buzzer circuit section 2 is held by the signal holding circuit section 5 even when the operation of the water sensor 1 is stopped, and continues sounding until the buzzer stop switch 13 is operated. On the other hand, even when the AC 100V power supply 10 is out of power, the power supply circuit section 4 is connected to the battery power supply 11 so that the alarm circuit from the water sensor 1 to the buzzer circuit section 2 can continue the conduction alarm operation. . As described above, by using the water detection structure with high sensitivity, the AC 100V power supply 10 and the battery power supply 11, emergency occurrence can always be reliably caught. The circuit structure of each circuit section and the structure of the sprinkler 16 in this embodiment are not limited to those described above. Further, the structure of the water sensor 1 is not limited to the structure of the embodiment, as long as the structure transmits water to the water detection circuit unit 3 side by adhesion of water. That is,
A separate water sensor may be installed near the sprinkler 16. According to the present invention, the following remarkable effects are obtained. 1) It is possible to reliably ascertain the state of sprinkler flooding when an abnormality such as a fire occurs. 2) Since the water sensor is formed with high sensitivity, an alarm can be generated by an extremely small amount of water. 3) The buzzer alarm is continued even at the time of a power failure because both the AC 100V power supply and the battery power supply are used. 4) Even after the water sensor is released, the buzzer operation is continued by self-holding. 5) The voltage of the battery power supply is constantly monitored and constantly charged and discharged to a normal state, so that power supply failure does not occur.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram including a cross-sectional view for explaining a detailed structure around a water sensor and a water detection circuit of main components of one embodiment of the present invention. FIG. 2 is a block diagram showing the overall configuration of the embodiment. FIG. 3 is a circuit diagram showing a detailed circuit structure of each circuit unit. FIG. 4 is a sectional view showing the internal structure of the sprinkler of the embodiment. FIG. 5 is a cross-sectional view showing the internal structure of the sprinkler at the time of outflow. [Description of Signs] 1 Water sensor 2 Buzzer circuit section 3 Water detection circuit section 4 Power supply circuit section 5 Signal holding circuit section 6 Buzzer 7 Power-on reset circuit section 8 Battery voltage monitoring circuit section 9 Battery charge / discharge circuit section 10 AC100V power supply 11 Battery power supply 12 Power switch 13 Buzzer stop switch 14 Power supply lamp 15 Low voltage lamp 16 Sprinkler 17 Nozzle body 18 Sprinkler head joint 19 Internal passage 19a Internal passage 19b Internal passage 20 Passage 21 Packing 22 Guide post 23 Plunger 24 Insulating member 25 Lever member 26 Low melting point alloy 27 Heat collecting plate 28 Slit 29 Slit 30 Lead wire 31 Lead wire 32 Connecting tool 33 Ceiling plate 34 Separate rib 35 Water inlet pipe 36 Water pipe 37 Transistor 38 Transistor 39 Transistor 40 Test switch

Continuation of the front page (56) References JP-A-5-292406 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A62C 39/00 A62C 35/68 A62C 37/50 G08B 21 / 00

Claims (1)

(57) [Claims] [Claim 1] An alarm that warns of water from a sprinkler
This device is supported by a ceiling plate and allows water to pass through it.
A nozzle body having an internal passage,
A sprinkler that is mounted below and falls off in the event of a fire;
The lower end contacts the sprinkler housed in the nozzle body
Guide for closing and closing the internal passage at its upper surface
The post is fixed to the center of the guide post via an insulating member.
The nozzle body and the plunger.
Has multiple resistors and capacitors between the ranja
A water detection circuit section is formed, and the water detection circuit section
Connected to the buzzer through the road, the buzzer circuit and water detection
Even if the water sensor stops operating, the buzzer
A sprinkler alarm device, wherein a signal holding circuit unit that operates a road unit is provided .