JPH012673A - Inspection device for automatic fire extinguishing system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an inspection device for the operating parts of an automatic fire extinguishing system that automatically releases extinguishing agent when the ambient temperature rises due to the occurrence of a fire.

(Prior art) Conventionally, automatic fire extinguishing systems have been of the solenoid valve type that combines temperature detection with a temperature detector and operation of an electromagnetic actuator, etc., and those that use a low-melting heater to melt and restore spring force. Fusible plug types that combine power and force are widely known.

The one illustrated in Fig. 12 is of the fusible plug type disclosed in Japanese Utility Model Publication No. 18129/1983, and an inner cylinder (L) is installed at the center of the bottom of the container 'D (P) for enclosing the extinguishing agent. A slidable outer cylinder (M) is provided thereon, and a cylinder (Q) for enclosing a pressurized medium is provided on the lower side thereof, and the cylinder (Q)
Needle-shaped opening/closing operating body (B) that destroys the sealing membrane material (A)
), and when the ambient temperature rises due to a fire, the temperature fuse (H) made of low-melting solder, etc. is melted.
The two locking pieces (X, Y) locked on the stopper (SP) are brought close to each other to release the locking, and the spring (V) returns to actuate the suppressor (D), and the operating body (B) is plunged into the membrane material (A), the pressurized medium is introduced into the inner cylinder (L), the outer cylinder (M) is moved upward, the passage (R) is opened, and the discharge path (NS) is moved upward. Direct the extinguishing agent into the cap (K).
It is designed to release extinguishing agent by blowing it away.

(Problems to be Solved by the Invention) By the way, in this type of automatic fire extinguishing system, when a fire occurs, each part must operate normally to ensure the reliable release of extinguishing agent, and the above-mentioned Periodic inspection of each operating part, such as the suppressor (D) and the operating body (B), is strongly required.

On the other hand, however, if inspections were conducted just for the sake of inspection, such as actually operating each part and releasing extinguishing agent based on the assumption that a fire would occur, it would be troublesome and would increase maintenance costs. I can't bear that trouble.

Therefore, for the solenoid valve type, remove only the solenoid valve.
It is common practice to conduct an inspection by energizing the coil and checking whether the operating rod etc. are working properly. ) and the part housing the suppressor (D), melt the fuse (H), and check the restoring force of the spring (V). However, at least the fuse (H) needs to be replaced. In addition, it is also necessary to replace the locking pieces (X, Y), etc., which will hold the material after the temperature fuse (H) melts, and in the end, the actual function check is almost impossible. Without being able to do so, they were limited to simply visually checking each part.

In any case, the ease of inspection is extremely poor, and furthermore, it only checks individual parts that are far removed from actual operation, and requires disassembly, so it is extremely inadequate as a function check. There was a problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inspection device for an automatic fire extinguishing system, which does not require disassembly or the like and can easily check the functionality of operating parts by simply operating a switch.

(Means for Solving the Problems) Therefore, the present invention provides that when the ambient temperature exceeds a predetermined value, the opening/closing operation body (4) is moved to open the container (1) containing the extinguishing agent.
This is an inspection device for an operating part of an automatic fire extinguishing system configured to release a fire extinguishing agent from a fire extinguisher, which includes an inspection switch (6) that issues an inspection operation command, and an inspection operation command issued by the switch (6) that causes the operation body (4) to be inspected. and a housing moving means (7) for forcibly moving the operating body (4) in response to an inspection operation command from the switch (6), with a stroke shorter than the stroke (a) that allows release of the extinguishing agent. (b
), and movement detection means (9) for detecting movement of the operating body (4).

(Function) In response to the inspection operation command from the inspection switch (6), the opening/closing operation body (4) is forcibly moved, and the movement stroke is shorter than the stroke (a) that allows release of the extinguishing agent ( b), and the operating body (
4) is detected, and the operation can be inspected without releasing extinguishing agent and without disassembling.

(Example) In Fig. 1, (1) is a dome cane container constituting a pressure vessel, and there is a fire extinguishing agent such as water or halon fire extinguishing liquid inside.
A) and high pressure gas (b) are sealed in the extraction duct (2) integrated at the bottom, and a membrane material (3) made of copper thin plate etc.
is inserted to seal the inside of the container (1), and the duct (2) is provided with an opening/closing operation body (
4) is attached via screw means (60).

The container (1) has its upper portion attached to the ceiling wall (12) via a mounting fitting (10) and a hanging pole 1-(11).

The membrane material (3) is tightly pressed against the duct (2) by 30
), which reliably prevents leakage of extinguishing agent. In addition, to install the membrane material (3), use the holding screw (30).
Alternatively, brazing may be performed by directly brazing the outer edge of the membrane material.

The opening/closing operation body (4) includes a hollow pipe body (41) with a sharp protruding portion (42) at the tip of the pipe body (41) that destroys the membrane material (3), and the body (41) is connected to the nozzle. It is inserted into a guide hole (51) formed in the portion (50) so as to be vertically movable.

Further, a plurality of openings (43) are provided in the side wall of the main body (41).
), and furthermore, a flange-shaped receiver (44) is provided at the lower end of the main body (41), and the receiver (44) has a shape that allows the operating body (4) to move upward. A coil wand actuating body (45) made of memory alloy is brought into contact with it.

The nozzle part (50) has a fire extinguishing agent introduction chamber (52) inside.
) and a discharge path (53) continuous thereto, and a hose-shaped first discharge nozzle (2) is provided at the end of the discharge path (53).
1) is installed.

In addition, the lower flange portion (54) that contacts the ceiling board (13)
) has a receiving surface (23) that receives the bottom of the operating body (45).
), and a cup-shaped second discharge nozzle (24) having a plurality of slit-shaped discharge ports (24) on the circumference as shown in FIG.
2) is installed.

Note that a seal rubber (61) is interposed between the nozzle portion (50) and the duct (2).

Further, a plurality of first discharge nozzles (21) attached to the discharge path (53) and the end thereof may be provided at appropriate locations on the circumference of the flange portion (54). They are installed at three locations that are offset by degrees.

The actuating body (45) is made of a shape memory alloy made of titanium-nickel alloy, for example, and changes its stroke from a contracted state to an extended state as shown in FIG. 3 when the ambient temperature rises due to a fire. the operating body (4
) into the membrane material (3). The temperature at which the actuating body (45) changes its shape is approximately 65 to 80°C.
Approximately ℃ is appropriate. Furthermore, the temperature hysteresis, that is, the temperature difference between the transition temperature from the contracted state to the elongated state and the transition temperature from the elongated state to the contracted state, can be appropriately selected depending on the constituent materials and processing of the shape memory alloy. It is preferable to keep the temperature to about 10-odd degrees Celsius or less.

In the automatic fire extinguishing system configured as above,
As shown in the block diagram of FIG. 4, the configuration for inspecting the operation of the opening/closing operation body (4) includes an inspection switch (6) that issues an inspection operation command, and a check operation command issued by the switch (6). A forced movement means (7) for forcibly moving the operating body (4), and a stroke (a) that allows the movement of the operating body (4) to discharge extinguishing agent in response to an inspection operation command from the switch (6). ), a locking means (8) for locking with a shorter stroke (b) than the operating body (
4) and a movement detection means (9) for detecting movement.

The inspection switch (6) issues an inspection operation command to switch between inspection and normal use, and is capable of switching, for example, by remote control.

As shown in FIG. 1, the forced movement means (7) includes an electric heater (70) along the coil of the actuation body (45).
The actuating body (45) is forcibly expanded by the heat generated by energization of the heater (70). In addition, the heater (70)
In addition to turning clockwise along the coil, the Inn moving body 45
) may be arranged to surround the heater (70
) can be used to heat the actuating body (45).

Further, the locking means (8) includes an electromagnetic actuator (
80), and the operation rod (81) of the actuator (80) is inserted into the elongated hole (82) formed in the main body (41) of the operation body (4), and the operation This forcibly stops the upward movement of the body (4).

In this case, the length (d) of the elongated hole (82) is the fifth
As shown in the figure, at a stroke (b) shorter than a stroke (a) in which the operating body (4) plunges into the membrane material (3) and allows release of the extinguishing agent, the lower end of the elongated hole (82) is set so that it hits the rod (81).

Furthermore, as shown in FIG. 1, the movement detection means (9) is configured using a limit switch (90) attached to the lower surface of the flange portion (54), and the limit switch (90) A contact piece (92) that contacts the switch lever (91) is attached to the receiver (44), and when the contact piece (92) is turned on by touching the lever (91), a lamp display or a buzzer display is performed. Or, or
By inputting this ON operation signal to the host system,
The operator is informed of the result of the operation of the operating body (4).

What is shown in FIG. 6 is a control circuit that interlocks each of the above-mentioned constituent means, and is connected between the power supply lines (U+W) to the inspection switch (6) and the relay (M) for receiving the inspection operation signal.
Rt) and the first of said relays (MRt).
Regular contact (MRt-1) and heater energization relay (MRh
), a parallel circuit between the second normal contact (MRt-2) of the relay (MRt) and an operation safety circuit (15) to be described later, and a series circuit between the actuator energizing relay (MRs); The normally open contact (MRh-) of the relay (MRh)
0) and the heater (70), and a series circuit between the second regular contact (MRs-2) of the relay (MRs) and the actuator (80) are connected, respectively.

The operation safety circuit (15) of 11η is connected to the relay (MRs).
) and the first contact (MS-1) of the limit switch (90).
) even after turning off the heater (70) and the operating body (45).
) cools down, the actuating body (45) contracts, and the relay (MR8) continues to be energized until the limit switch (90) is turned off, and the rod (81) of the actuator (80) is lengthened. The operating body (4) is left inserted into the hole (82), and the operating body (4) is heated by residual heat from the heater (70).
This prevents the situation in which the liquid rises to unused charge and rushes into the membrane material (3), and the actuating body (45) cools down and the operating body (4
) is in a shortened state before the rod (81) is retracted to ensure safe completion of the inspection operation.

Further, the second contact (MS-) of the limit switch (90)
2) Operation signal output terminal (++ J) opened and closed by
In the drawing, a lamp display circuit (16) equipped with a light emitting diode (LED) and a direct current type [(DC) is connected to the terminal (++ J). Connected.

Furthermore, using the heater (70) provided for inspection,
In addition to the operation based on self-temperature sensing by the actuating body (45), external sensors (S
It is also possible to operate using this sensor (S).
S) is connected in parallel with the contact (MRt -1) that is turned on by the inspection switch (6), and during normal use, when a fire is detected by the sensor (SS), the heater (7
0) is turned on, the operating body (45) is extended, and the opening/closing operation body (4) is thrust into the membrane material (3) so that the extinguishing agent can be released.

Next, the operation during inspection will be explained.

When the inspection switch (6) is turned on, the relay (M
Rt) is excited, and its contact (MRt-1) (MR
t-2) and energize the relays (MRh) (MRs).

This closes the contacts (MRh-0) (MRs-2) and energizes the heater (70) and actuator (80).

Therefore, as shown in FIG.
The operating rod (81) of No. 0) will be inserted into the elongated hole (82).

Further, the actuating body (45) is heated by the heater (70).
) is heated up and its shape changes from a contracted state to an elongated state as shown in FIG.

The rod (8) inserted into the elongated hole (82)
1), the upward stroke is regulated, and the contact piece (92) is brought into contact with the lever (91) of the limit switch (90), so that the contacts (MS-1) (MS-2)
is turned on and lights up a lamp (LED) to inform the operator that the operating body (4) is operating normally.

Also, at this time, the contact (
MS-1) is also turned on, causing the energizing circuit of the actuator actuating relay (MRs) to be in a self-holding state.

Therefore, as described above, even after the inspection switch (6) is turned off, the operating body (45) cools down and the contact (MS
-1) is turned off until the long hole (
82) can be continued to ensure safety when the inspection is completed.

As shown in the figure below, the operation of the operating body (4) can be easily and reliably checked by simply operating the inspection switch (6), making periodic inspections convenient and contributing to maintaining the reliability of the device. It is possible.

In addition, during normal use other than during inspection, the inspection switch (6)
is turned off and the relay (MRt) is not energized, so its contact (MRt-2) is always open and the relay (MRt) is not energized.
Rs) is not excited and the actuator (80) is not activated.

In addition, the actions to be taken in the event of a fire occurring while using a commuting seat are as follows.

When the ambient temperature rises due to a fire outbreak, as shown in FIG. 9, the shape memory alloy actuating body (45) detects its own temperature and energizes the heater (70) by the external sensor (SS). As a result, the shape changes from the contracted state to the extended state, and the operating body (4) of 1111 is pushed up to cause its projecting portion (42) to enter the membrane material (3), as shown by the arrow in the figure. The extinguishing agent is introduced into the main body (41) from the plunge part (42) and into the introduction chamber (52) through the opening (43) formed in the main body (41), and the extinguishing agent is introduced into the discharge path (53) and the first The extinguishing agent is discharged via the discharge nozzle (21).

At the same time, a part of the extinguishing agent is introduced into the second discharge nozzle (22) through the interior of the main body (41), and the extinguishing agent is also discharged from the slit-shaped discharge port (24). At this time, the actuating body (45) installed inside the second discharge nozzle (22)
) comes into contact with the extinguishing agent to exchange heat, and the working body (45) lowers its own temperature.

As a result, as shown in FIG. 10, the actuating body (45
) returns from the extended state to the contracted state, and from the state where the operating body (4) is inserted into the membrane material (3), the membrane material (3)
The operating body (4) returns to its original state when it exits, and the membrane material (3) has a large break hole (h) for releasing the extinguishing agent, as shown by the arrow in the figure. Then, the extinguishing agent is continued to be discharged from the container (1) through the rupture hole (h), and the first and second discharge nozzles (
21) The extinguishing agent can be discharged smoothly from (22).

In the embodiments described above, the opening/closing operation body (4) is operated by an operation body (45) made of a shape memory alloy, but it may be operated by an operation rod of an electromagnetic actuator.
In addition to the destruction of the membrane material (3), the extinguishing agent can be released by providing a valve seat and a valve body seated in the extinguishing agent discharge flow path.
The valve body may be opened and closed, and the embodiment can be applied to these cases as well.

Furthermore, in the above embodiment, an inspection device such as an actuator (80) was installed in the nozzle section (50) at the end that discharges the extinguishing agent, but as shown in FIG. 55) may be interposed in the head portion (32) of the cylinder-type container 4(1), which is connected to the container 4(1) via a pipe (31). What is shown in Figure 11 is a container (
1) and the outlet (33) for the extinguishing agent from the pipe (3).
A valve body (34) for opening and closing the flow path is interposed between the valve body (34) and the membrane material (34) on the back pressure chamber (35) side of the valve body (34).
), opening/closing operating body (4), and actuator (3)
6), the back pressure chamber (35) is opened to the atmosphere by breaking the membrane material (3) of the operating body (4), and a negative pressure is created, and the valve body (34) is opened to the membrane material (3). The extinguishing agent is guided to the nozzle part (55) by moving the fire extinguishing agent to the material side, and the forced movement means forcibly energizes the actuating actuator (3θ) and constitutes a locking means. The movement stroke of the operating body (4) is regulated by the earth-extracting actuator (80).

Furthermore, in the above embodiment, each constituent means of the inspection device is linked using a relay circuit, but control may also be performed by an electronic circuit, or a plurality of fire extinguishing devices may be arranged and centralized control may be used to unify them. A device may be formed and controlled by a microcomputer in combination with the central control device.

(Effects of the Invention) As described above, according to the present invention, the opening/closing operation body (4) is forcibly moved in response to the inspection operation command from the inspection switch (6), and the movement stroke is controlled to release the extinguishing agent. A shorter stroke (b) than the stroke (a) that allows
), and the movement of the operating body (4) is detected, and the operation can be easily and reliably inspected without releasing extinguishing agent and without disassembling. It is possible.

Therefore, it is possible to make periodic inspection convenient and contribute to maintaining the reliability of the device.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an automatic fire extinguishing system equipped with the inspection device of the present invention, Fig. 2 is a side view of the main parts thereof from the ■ arrow direction, Fig. 3 is an operating temperature characteristic diagram of the opening/closing operation body, and Fig. 4 is A block diagram showing the configuration of the inspection device, FIG. 5 is a diagram showing the configuration for stroke regulation, FIG. 6 is a circuit diagram of the inspection device, and FIGS. 7 and 8.
The figure is an explanatory diagram of the operation during inspection, Figures 9 and 10 are explanatory diagrams of the operation when a fire occurs, Figure 11 is a cross-sectional view of the main part showing another embodiment, and Figure 12 is a cross-sectional view of the conventional example. be. (1) Container (4) Opening/closing operation body (6) Inspection switch (7) Forced movement means (8) Locking means (9) ...Movement detection means

Claims (1)

[Claims] (1) When the ambient temperature exceeds a predetermined value, the opening/closing operation body (4)
An inspection device for an operating part of an automatic fire extinguishing system configured to move a fire extinguisher and release a fire extinguisher from a container (1) enclosing the fire extinguisher, comprising: an inspection switch (6) for issuing an inspection operation command; and the switch. A forced moving means (7) for forcibly moving the operating body (4) in response to an inspection operation command from the switch (6); A locking means (8) for locking with a stroke (b) shorter than a stroke (a) that allows release of the operating body (4), and a movement detection means (9) for detecting movement of the operating body (4). An inspection device for an automatic fire extinguishing system characterized by: