JPH0446768Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to the improvement of fire extinguishing systems, and more specifically, the present invention relates to the improvement of fire extinguishing systems, and more specifically, the fire detection means of fire extinguishing systems that are not activated except in emergencies. The purpose of this system is to make it possible to determine with a simple operation whether the function of the electrical circuit from the fire detection means to the activation device is normal or abnormal in the case of a device that activates the activation device of a fire extinguishing system. That is.

(Prior Art) Conventional automatic fire extinguishing systems are equipped with a fire detector and, based on a fire occurrence signal from the detector, use an electrical signal to close the activation circuit for extinguishing agent injection and emit the extinguishing agent. Various proposals have been made so far.

However, in the case of the above-mentioned known automatic fire extinguishing system, since it does not operate for a long time except in emergencies, the electric circuit including the external wiring leading to the fire detector and the extinguishing agent injection starting circuit is Due to corrosion or other causes, conduction defects may occur, and experience has shown that it is common for these devices to fail in the event of a fire.

To do this, the small high-pressure gas cylinder for injecting extinguishing agent or starting the fire extinguishing system is removed, and then certain conditions such as heat are artificially applied to the fire detector to confirm activation of the starting part. Things have been done.

(Problems to be solved in the design) However, the above-mentioned artificial test is meaningless unless it is performed every few days, and if such test work is to be performed frequently, the amount of work time spent on it is relatively large. The problem is that it lacks rationality because it occupies a large number of people.

(Means for Solving the Problems) Therefore, the present invention solves the various problems in the conventional automatic fire extinguishing system described above, and checks the normality of the electrical circuit by removing the small high-pressure gas cylinders for injection or startup one by one. A fire detector that can be checked at any time by simply applying certain conditions such as heat, smoke, and light to the fire detector without any installation, and guarantees reliable operation in an emergency. Specifically, in a fire extinguishing system having a fire detection means and a contact point that closes the starting circuit of the fire extinguishing system by an electrical signal associated with fire detection, the starting circuit has a The present invention is characterized in that a bypass circuit for a weak current that does not cause the starting device to start is connected in parallel with the above contact, and a check clamp is provided which is indicated by the conduction current of the bypass circuit.

(Example) The specific content of the present invention will be explained below based on the illustrated example.
1 is a fire detector, 6 is a control unit for a fire extinguishing system, and 18 is a starting device for the fire extinguishing system.

The fire detector may be of a known and commonly used structure and is installed at the location where the fire is expected to ignite.

The control unit 6 of the fire extinguishing system includes a power lamp 4, a relay 8 and its contacts 7, and a buzzer 9 and the relay contacts 1 between the positive line 2 and the negative line 3.
0, time lag relay 11, relay contact 12, switch caution lamp 15 and test switch 1
4 are interposed respectively.

Furthermore, a test switch 14 is interposed between the positive side line 2 and the external line connection terminal 25 and the contact 13 of the time lag relay and the positive side of the lamp 15 described above.

Furthermore, a resistor 17 and a check clamp (for example, a light emitting diode) 16 are interposed between the contact 14a of the test switch 14 on the side having the contact 13 and the external line connection terminal 25, and one end of the resistor 17 is connected to the buzzer 9 and its contact 10. and a resistor 17
As a result, a weak current of about 10 to 15 milliamperes is applied to the check clamp (light emitting diode) 16 and the fire extinguisher starting device 18 at the same time as the fire detector is activated. Note that 5 indicates a recovery switch.

The details of the starting device 18 are shown in FIG. 2, and it includes a casing 18a in which a predetermined amount of a gas generating agent 19a is filled into a hollow chamber 19 and an opening thereof is sealed with a sealing plate 21, and a casing 18a whose opening is sealed with a sealing plate 21, It consists of a filament 20 facing inward of the filament 19a, a bonding wire 22 connected to the filament 20, and a connector 23 for connecting the end of the bonding wire 22 to a lead wire 24.

As shown in FIG.
The tip of the movable rod 37, which is fixed at a position near the tip of the lower lever 29 which is integrally fixed to the head portion 28 fixed to the lower lever 28, and which is loosely fitted into the upper end of the lever 37, is attached to the lower lever 29. The substantially central portion thereof faces toward one end of the guiding plate 33 which is rotatable like a seesaw by the shaft 32, and
A coil spring 34 is interposed between the guide plate 33 and the lower lever 29 on the other side, and its tip is connected to the needle piercing body 36.
It is engaged with the upper end engaging portion 35 of.

(Function) In the configuration of the first embodiment described above, the control unit 6
When the power supply terminals A1 and A2 are connected to the power source, the power lamp 4 lights up, the switch caution lamp 15 goes out, and the control unit 6 operates electrically.
Indicates that it is activated at any time. When the sensing means 1 such as a fire detector detects the occurrence of a fire, the relay 8
is activated, and at the same time contacts 7, 10, and 12 close all at once.

As a result, the buzzer 9 is activated to emit an alarm sound, and the time lag relay 11 is activated.

In this time lag relay 11, the contact 13 closes after a certain period of time (for example, 10 seconds) has passed, and the starting device 1
8, and in this case, instead of relays and time lag relays, ICs, diodes, and
A transistor or the like may also be used.

On the other hand, when the starting device 18 is given a starting current,
When the filament 20 is heated, the gas generating agent 19a filled in the hollow chamber 19 burns and expands, destroying the sealing plate 21 and pushing the floating rod 37 upward.

As a result, the floating plate 33 rotates counterclockwise in FIG. ), the sharp lower end of the cutting edge 38 breaks the seal of the small high-pressure gas cylinder 39 and forces the gas content into the container 26, thereby discharging the extinguishing agent in the container 26 to the piping connection port. The liquid is injected from 40 through a pipe (not shown). Further, the buzzer is stopped by pressing the recovery switch 5 of the control section.

In the fire extinguisher having the configuration shown in FIG. 3, it is also possible to manually push down the upper lever 31 and cause the needle 36 to radiate the gas in the small high-pressure gas cylinder outward.

Further, the starting device is not necessarily limited to the configuration shown in FIG. 2, and as shown in FIG. The extinguishing agent may be emitted by pushing the lever 31 downward with a solenoid plunger 42 using electric power via the rod 43. In this case, the solenoid may be automatically de-energized after a certain period of time has elapsed, for example, for 3 to 5 seconds.

Therefore, when inspecting the electrical circuit in the case of the first embodiment, the test switch 14 is switched to the test side (in this case, the switch caution lamp 15 lights up and the contact 14a becomes an open circuit). If there is no abnormality in the fire detector 1, the external wiring 24', and the control unit 6, the relay 8 will be activated and the contact will be 1
0 closes and the buzzer sounds and the activation device 1
If there is no abnormality in the electrical system 8 and its external wiring 24, the check lamp (light emitting diode) 16 lights up, indicating that there is no abnormality overall.

Thereafter, by operating the recovery switch 5, the buzzer 9 will stop (if the sensor has not recovered, the buzzer will not stop, so wait a little while). Next, by returning the test switch 14 to its original state (the switch caution lamp is turned off), the system returns to the monitoring state and becomes alert in case of a fire.

(Embodiment) Furthermore, the structure of another embodiment of the present invention is shown in FIG. 5 and below.

That is, in the embodiment shown in FIG. 5, the resistor 17 and the check clamp (light emitting diode)
A bypass circuit consisting of 16 is provided between one end 14a of the test switch 14 on the side having the contact 13 and the positive line 2.
A contact 43 that operates synchronously with 0 and 12 is interposed.

Further, in the embodiment shown in FIG. 6, a bypass circuit consisting of a resistor 17 and a check clamp (light emitting diode) 16 connects one end 14a of the test switch 14 on the side having the contact 13, and the time lag relay 11 and the contact 12. connected between.

In the embodiment shown in FIG.
4 is connected to one end of one side 14a of the relay 8 and a contact 10 of the relay 8.

Furthermore, the ones shown in Figures 8 and 9 represent embodiments in which optical sensors are applied. Optical sensors normally use ultraviolet or infrared rays, which are extremely common in daily life, and are used as fire detection means. Normally, it is used only in places where there is no fire or direct sunlight, but because the reaction time is extremely short compared to other sensing means, it is often used depending on the installation location and by limiting the light receiving range. Ru.

In this embodiment, the circuit 2 of the fire detection means 1
Similar to smoke detectors, a current of the order of microamperes normally flows through 4' (details are omitted).
When the sensor is activated, a current on the order of milliamperes flows. The difference from FIG. 1 and FIGS. 5 to 7 is that a test switch and a switch warning lamp are not provided. This shines a light on the sensor during inspection, but the buzzer 9
If the light is removed when the alarm goes off, not only will there be no remaining triggers such as heat or smoke detectors, but there will also be no activation device, so this is designed to simplify the circuit as much as possible. Not yet.

In addition, in FIG. 8, a check clamp (light emitting diode) 16 and a resistor 17, which are inspection confirmation lights, are shown.
is interposed between a portion 2' of the line connecting the fire detector 1 and the time lag relay 11 closer to the sensor and the starting device side of the contact 13-4 of the time lag relay 11'. The time lag relay 11' is connected to the negative line 3 through the contact 13-3 of the time lag relay 11, the buzzer 9 is connected to the fire detector 1 through the contact 13-2 of the time lag relay 11, and the time lag relay 11 is connected to the fire detector 1 through the contact 13-2. Via the diode, and the contact 13-4 of the time lag relay 11' is arranged between the power sources 2, 3, respectively, through the activation device 18. In addition, contact 13-1 of time lag relay 11 is connected to line 2 and relay 1 for self-holding of the same relay.
1 and the line 2 side.

(Function) In the configuration shown in FIG. 8 above, when the fire detector receives ultraviolet or infrared rays emitted from a fire or a test fire, the strength of the current becomes on the order of milliamperes, the time lag relay 11 is activated, and the time lag relay 11 is activated. When the flame continues for a period of time (for example, 5 seconds), contact 1
3-1, 13-2, and 13-3 are closed, the time lag relay 11 maintains its self-holding state, and the buzzer 9 sounds. Further, the time lag relay 11' is activated, and when the flame continues for a certain period of time (for example, 5 seconds), the contact 13-4 of the time lag relay 11' closes and the starting device 18 is activated. On the other hand, the fire detection means 1 receives flame and the time lag relay 11 is activated, and at the same time,
The check clamp (light emitting diode) 16 lights up.

Therefore, during inspection, if you remove the test flame etc. as soon as you confirm that the check clamp (light emitting diode) 16 lights up and the buzzer 9 sounds, it will not start and the buzzer will only sound, and then turn on the recovery switch 5. By operating the button to stop the buzzer 9, a monitoring alert state is entered, and the electric circuit can be easily tested. In the embodiment shown in FIG. 9, the check clamp (light emitting diode) 1
6 and resistor 17 are taken out from the positive line 2 side of the buzzer 9, and the check lamp (light emitting diode) 16 is lit at the same time as the buzzer 9 sounds to confirm the normality of the electrical circuit. The configuration is the same as that of the embodiment shown in FIG. 8 already described.

(Effects of the invention) As described above, the present invention provides a fire extinguishing system having a fire detection means and a contact that closes the starting circuit of the fire extinguishing system by an electrical signal associated with fire detection. A bypass circuit for a weak current that does not cause the activation device to start when the device is sensed is connected in parallel with the contact, and a display device is provided that displays the conduction current of the bypass circuit. As long as the gas remains in normal condition, an indicator such as a check clamp (light emitting diode) will light up during inspection, and this can be visually confirmed. No need for troublesome work such as removing the solenoid.
Since the starting circuit of the injection starting part can be easily inspected by applying a certain amount of heat, it is extremely safe as it can ensure activation in an emergency even in fire extinguishing equipment that is rarely used. A highly reliable fire extinguishing system can be realized.

[Brief explanation of drawings]

Fig. 1 is an electrical circuit diagram of the control section of a fire extinguishing system according to an embodiment of the present invention, Fig. 2 is a vertical cross-sectional view showing an outline of the starting device, and Fig. 3 is the starting device of Fig. 2. Vertical cross-sectional view of the main parts of the fire extinguishing system with the
The figure is a sectional view of a main part of a fire extinguishing system showing another embodiment of the starting device, and FIGS. 5 to 9 are electrical circuit diagrams showing further embodiments of the present invention. 1... Fire detector, 6... Control unit, 7, 10,
12, 43...Relay contact, 8...Relay, 9...
...buzzer, 11,11'...time lag relay,
13, 13-1 to 13-4... Time lag relay contact, 14... Test switch, 15... Switch caution lamp, 16... Check clamp, 17
...Resistance, 18... Starting device, 26... Container, 2
8...Head portion, 29...Lower lever, 31...Upper lever, 33...Swivel plate, 36...Needle piercing body, 37
...Floating rod, 39...Small high-pressure gas cylinder, 40
...Piping connection port, 41...Solenoid.

Claims (1)

[Scope of utility model registration request] In a fire extinguishing system that has a fire detection means and a contact point that closes the starting circuit of the fire extinguishing system by an electrical signal associated with fire detection, the starting circuit has a weak point that is so weak that the starting device does not start when the fire detection means detects the fire. A fire extinguishing system characterized in that a current bypass circuit is connected in parallel with the contact and a check clamp is provided which is indicated by the conduction current of the bypass circuit.