JP3135376B2 - Fire extinguisher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguisher for extinguishing a fire by discharging a fire extinguishing agent such as water, foam, powder or the like using a monitor nozzle.
The present invention relates to a fire extinguisher for extinguishing a fire in a large indoor or outdoor space such as an exhibition hall, a factory or a hangar.

[0002]

2. Description of the Related Art A monitor nozzle (also referred to as a fire extinguisher, a fire extinguisher, a water cannon, etc.) is used as a fire extinguisher in a large space, and a fire extinguishing agent such as water, foam, or powder is discharged from the monitor nozzle. Fire extinguishing systems that extinguish and extinguish are used.

In such a conventional fire extinguishing device, the monitor nozzle radiates the fire extinguishing agent in a rod-like state, so that the range that can be protected by one monitor nozzle is small, and the fire extinguishing agent is aimed at a fire point, that is, a fire extinguishing point. It was necessary to accurately determine and radiate, and it was difficult to cope with the spread of fire and the suppression of fire spread.

[0004] Therefore, as a fire extinguisher against a fire that occurs in a large space, water,
A plurality of monitor nozzles for discharging foam or powdered fire extinguisher are provided, and when a fire occurs in the fire extinguishing section, the fire extinguishing agent is discharged while reciprocating left and right of the plurality of monitor nozzles in charge of the fire extinguishing section. A fire extinguisher that is sprayed has been proposed.

In such a fire extinguishing device, a plurality of monitor nozzles sprays a fire extinguisher over the entire area of the fire extinguishing section while reciprocatingly turning around the fire extinguishing section where a fire has occurred. Compared to the method that discharges the fire extinguisher after aiming at the fire point, it is not necessary to set the discharge aim at the fire point, so it is possible to immediately start fire extinguishing activity when a fire occurrence is detected, which is effective for initial fire extinguishing At the same time, the fire extinguishing agent is sprayed over a wide area including the fire spot, so that the spread of fire can be effectively suppressed.

However, in this fire extinguisher, since the plurality of monitor nozzles simultaneously emit the fire extinguishing agent while rotating, the fire extinguishing agents emitted from the plurality of monitor nozzles collide with each other, and as a result, the extinguishing agent is discharged. It may not be possible to spray the fire extinguishing compartment effectively. In addition, since it is not known at which location in the fire extinguishing compartment the collision between the fire extinguishing agents occurs, a situation arises in which the spraying to the required location cannot be performed effectively due to the collision in an emergency.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to prevent the fire extinguishing agent discharged from a plurality of monitor nozzles from colliding or to keep the collision point constant. The agent was selected such that there were no points where the agent would not be effectively applied.

[0008]

Means for Solving the Problems] To achieve this object, according to the present invention, for fire fighting area of a large space, it
In a fire extinguisher that sprays a fire extinguishing agent while reciprocating or continuously turning a plurality of monitor nozzles separately provided at different positions by respective turning mechanisms, the turning direction of the plurality of monitor nozzles is changed. Make the same direction
Thus, a fire extinguisher characterized by providing a turning direction control means for controlling the plurality of turning mechanisms is provided.

According to another aspect of the present invention, there is provided a fire extinguisher that sprays a fire extinguishing agent while reciprocating or continuously turning a plurality of monitor nozzles in a fire extinguishing area in a large space. A turning start control means for causing the turning directions of the monitor nozzles to be in the same direction at the time of starting the turning of the nozzles, and turning by the turning start control means of the monitor nozzles provided at least at opposing positions of the plurality of monitor nozzles; A fire extinguisher is provided, which is provided with turning start delay means for shifting a start time.

[0010]

The plurality of monitor nozzles which are reciprocated or continuously swirled in the fire extinguishing area of the large space are swirled in the same direction by the swirling direction control means. Thus, if the fire extinguishing agents discharged from the plurality of monitor nozzles collide with each other, they are almost at the center, and a problem that the fire extinguishing agent does not reach the corners or the like due to the collision is prevented.

According to the second aspect, the plurality of monitor nozzles reciprocatingly or continuously swirled in the fire extinguishing region of the large space are swirled in the same direction at the start of the swirl by the swirl start control means. The turning start times of the monitor nozzles provided at opposing positions are shifted by turning start delay means. Thereby, since the fire extinguishing agent does not collide at the central portion, it can reach far away.

[0012]

An embodiment of the present invention will be described below.

In the present invention, for example, a fire extinguishing section in a large space is divided into several districts, and a corresponding monitor nozzle discharges a fire extinguishing agent to perform a fire extinguishing activity in a district where a fire has occurred. Shows only the first district Z among the fire extinguishing sections of a large space to which the present invention is applied, and four monitor nozzles (also referred to as a water cannon or a water cannon, a fire extinguishing gun) G1 to G4
Is arranged. When a fire occurs in the first area Z, as shown in FIG. 1, the monitor nozzles G1 to G4 are swung right and left by a hydraulic motor (or an electric motor) in a semicircular shape, and water, foam, powder The first area Z is extinguished by spraying a fire extinguishing agent. The monitor nozzles G1 to G
4 is provided above a wall surface or hung from a ceiling surface in the case of indoors, and is provided in the case of outdoors.
It is installed on the roof of a building or on a tower.

Monitor nozzle (water discharge gun) used here
G1 to G4 are, for example, Japanese Utility Model Application Hei.
No. 1 as well as those described in Japanese Utility Model Application No. 3-28113 filed on Apr. 23, 1991 with the same name, and other types of monitor nozzles having a swivel function. There may be. FIG. 2 schematically illustrates such a monitor nozzle that can be used in the present invention. In FIG. 2, the nozzle mounting portion 10 is for mounting a nozzle such as a variable spray nozzle (not shown), Shaft support 1
At 2, it is pivotally supported on the water discharge conduit 24 of the water discharge cannon rotation part 14 so as to be vertically rotatable. Elevating expansion / contraction means 18 is mounted on the water cannon rotating section 14, and one end of the elevating expansion / contraction means 18 is connected to the nozzle mounting section 10 via a link 18 a by a shaft support 10 a, whereby The nozzle mounting portion 10 and, therefore, the nozzle (not shown) includes
8 can be turned up and down by expansion and contraction. The water cannon rotating section 14 is rotatably attached to the water cannon main body 20, and is rotated by the turning hydraulic motor 22. The nozzle (not shown) attached to the nozzle attachment portion 10 by this configuration moves the monitoring area in the lateral direction, that is, the turning direction, by turning the water discharge gun turning portion 14 with respect to the water discharge gun body 20 by the turning hydraulic motor 22. In addition, the elevating telescopic means 18 is extended and retracted by a hydraulic motor 19 for elevating (not visible in FIG. 2 because it is located behind the elongating means 18 for elevating), so that it is possible to elevate vertically.

Further, in the water discharge gun, that is, the monitor nozzle shown in FIG. 2, a turning encoder 30 for detecting the rotation angle of the water discharge gun turning section 14 by the turning hydraulic motor 22, that is, the rotation angle of the nozzle in the turning direction, is provided. The nozzle mounting part 10 is attached and is
The elevation encoder 72 for detecting the vertical rotation angle, that is, the elevation angle, is mounted.

In FIG. 3, the turning hydraulic motor 22 for turning the water discharge gun turning section 14 and the raising hydraulic motor 19 for expanding and contracting the raising and lowering means 18 in each of the monitor nozzles G1 to G4 are biased. A hydraulic system is shown. FIG. 4 shows a control circuit CC having a microcomputer, for example, in a fire control panel PC for controlling the hydraulic system of FIG. 3 by inputting a fire area signal from a fire receiver or an emergency switch (not shown). ing. The control circuit CC shown in FIG. 4 outputs a control signal to the electromagnetic switching valve EV of the hydraulic system shown in FIG. 3 while receiving signals from the turning encoder 30 and the raising encoder 72 described above, and turns the water discharge gun on. When it is determined that the swing limit has been reached based on a signal from each encoder, the electromagnetic switching valve EV is switched to reverse the hydraulic flow given from the hydraulic pump OP via the flow control valve FV. To turn or raise the water cannon in the opposite direction.
By controlling the turning in the opposite direction, it is possible to spray the fire extinguisher on the fan-shaped area as shown in FIG. Note that the configuration and operation of the hydraulic system are the same for the other water cannons or monitor nozzles G2 to G4.
In the drawings, illustration and description are omitted.

[0017] Hereinafter, with reference also to the flowchart shown in FIG. 5, the operation of the present embodiment. In the following description of the operation, in order to simplify the description, a case in which the water discharge gun, that is, the monitor nozzle rotates only in the turning direction will be described.

When a fire occurs and a signal from a fire receiver (not shown) or a signal from an emergency switch (not shown) is input to the control panel PC, a control having a microcomputer of the control panel PC is performed. The circuit CC is
A discharge command is output to the monitor nozzles G1 to G4 (step 102), and a right turn command is output (step 104), whereby the monitor nozzles G1 to G4 are simultaneously driven in the same right direction at the same turn speed. Start turning. During the turn, the control circuit CC sets the monitor nozzles G1 to G4.
A signal representing the turning angle from the turning encoder 30 is read (step 106), and it is monitored whether or not each of the monitor nozzles G1 to G4 has reached the limit of its turning range. In the control circuit CC, the right-turn limit and the left-turn limit are set and stored in advance so that each monitor nozzle sprays the arc region or the fan-shaped region illustrated in FIG. In such a setting storage method, a memory for storing those limits may be built in the control circuit CC,
Alternatively, a manually settable means such as a dip switch may be used.

The control circuit CC provides, for each monitor nozzle,
The signal from the turning encoder 30 is always compared with the corresponding limit preset and stored.
When each of the monitor nozzles G1 to G4 that are turning right (turn left) reaches the limit of right turn (left turn) (YES in step 108 or 110), the mode is switched to left turn (right turn). A switching command is output to each of the turning electromagnetic switching valves EV of the hydraulic system (step 112).

In this manner, each of the monitor nozzles G1 to G
No. 4 continues spraying while reciprocating in a semicircular area with respect to the fire extinguishing section Z until the fire extinguishing is completed (step 114). In this case, since each monitor nozzle starts simultaneously turning in the same direction at the same turning speed, it always reciprocates in the same direction. If it is determined that the fire extinguishing has been completed (YES in step 114), the monitor nozzle G
For 1 to G4, a release stop command (step 116) and a predetermined position stop command (step 118) are issued.
It becomes the first standby state.

In consideration of the case where the turning speed varies during the reciprocating turning of each monitor nozzle,
The control circuit CC compares the monitor nozzle turning angle signal with the limit value corresponding to the monitor nozzle for each monitor nozzle, and determines whether each monitor nozzle G is turning right (turning left).
When it is determined that each of the nozzles 1 to G4 has reached the limit of the right turn (left turn), the right turn (left turn) is temporarily stopped, and all the monitor nozzles G1 to G4 are turned right (left turn). When it is determined that the time has been reached (Y in step 108 or 110)
ES), a switching command may be output to each of the electromagnetic switching valves EV for turning of the hydraulic system so as to switch to left turning (right turning) (step 112). In this way, even if there is a slight variation in the swirl speed of each monitor nozzle, the deviation of the reciprocating swirl cycle that occurs little by little while each monitor nozzle is reciprocatingly swirls is removed and the same direction is always maintained. It is possible to control to turn.

If the water discharge control is performed as shown in FIG. 5, since the turning directions of the plurality of monitor nozzles are set to the same direction, that is, the plurality of monitor nozzles are simultaneously turned clockwise or counterclockwise. If the fire extinguishing agents discharged from the nozzles collide with each other, the fire extinguishing agent gathers at one point in the substantially central part.If the collision point is only one point at the center part, the fire extinguishes at another point such as a corner due to the collision. There is no problem that the agent does not reach, and the fire extinguishing agent is also scattered by collision even in the central part, so that the fire extinguishing agent can be effectively applied to the entire fire extinguishing section.

Next, a second embodiment of the present invention will be described with reference to FIG.
And a flowchart shown in FIG. In the first embodiment, a case has been described in which the fire extinguishing agent is controlled to collide at the central portion. In the second embodiment, for example, the fire extinguishing agent discharged from each monitor nozzle is placed on the facing surface or For reasons such as wanting to reach the opposite wall,
Conversely, this is a case where release control is performed so as to avoid collision.

As in the first embodiment, when a fire occurs and a signal of a fire area or a signal from an emergency switch is input to the control panel PC from the fire receiver, the control panel PC has, for example, a microcomputer. The control circuit CC outputs a discharge command to the monitor nozzles G1 to G4 (step 202). Then, first, a right turn command is output to the turning electromagnetic switching valve EV of the monitor nozzle G1 (step 20).
4) The monitor nozzle G1 is turned clockwise, and after a lapse of a predetermined time (YES in step 206), the monitor nozzle G1
A right turn command is output to the second electromagnetic switching valve (step 208), the monitor nozzle G2 is turned right at the same turn speed as the monitor nozzle G1, and after a predetermined time has elapsed (YES in step 210). Then, a right turn command is output to the turning electromagnetic switching valve of the monitor nozzle G3 (step 212), and the monitor nozzle G3 is turned right at the same turning speed as the monitor nozzle G1. After a lapse of time (YES in step 214), a right turn command is output to the turning electromagnetic switching valve of the monitor nozzle G4 (step 216), and the monitor nozzle G4 is similarly turned right at the same turning speed as the monitor nozzle G1. As described above, the monitor nozzles G1 to G4 are turned at the same turning speed and at the same turning speed by the predetermined time at the start of turning.

This is shown in FIGS. 8A, 8B, 8C and 8D. FIG. 8A shows a position where only the monitor nozzle G1 has turned while the first predetermined time has elapsed, and a fan-shaped area sprayed by the monitor nozzle G1.
B indicates that the monitor nozzle G1
And positions at which G2 and G2 have turned and their monitor nozzles G1
8 and FIG. 8 show fan-shaped areas scattered by G2.
8C shows the positions where the monitor nozzles G1 to G3 have turned while the next predetermined time has elapsed, and the fan-shaped area scattered by the monitor nozzles G1 to G3, and FIG. The positions at which the monitor nozzles G1 to G4 turn while the next predetermined time elapses, and the fan-shaped areas sprayed by the monitor nozzles G1 to G4 are shown.

While the monitor nozzles G1 to G4 continue turning, the control circuit CC reads a signal representing the turning angle from the turning encoder 30 of each monitor nozzle (step 2).
18), it is monitored whether each monitor nozzle has reached the limit of its turning range, and if the monitor nozzle that is turning right (turning left) reaches the limit of right turning (turning left) ( Steps 220 and 222, 226 and 228, 232 and 2
34, and 238 and 240), the respective electromagnetic switching valves EV of the hydraulic system are switched and controlled so as to stop the right turn (left turn) and shift to the left turn (right turn) (step 2).
24, 230, 236, and 242).

Thus, each of the monitor nozzles G1 to G
No. 4 continues spraying while reciprocating in a semicircular area with respect to the fire extinguishing section Z until the fire extinguishing is completed (step 244). If it is determined that the fire extinguishing has been completed (YES in step 244), a discharge stop command (step 246) and a predetermined position stop command (step 248) are issued to the monitor nozzles G1 to G4, and the first standby state is set. Become.

In the second embodiment shown in FIGS. 6 and 7, a case has been described in which the turning of each of the monitor nozzles G1 to G4 is controlled so as to be sequentially shifted by a predetermined time, but the monitor nozzles G1 and G3 are controlled. , And monitor nozzles installed at positions facing each other, such as G2 and G4, may be shifted by a predetermined time.

If the water discharge control is performed as shown in FIGS. 6 and 7, the fire extinguishing agent does not collide at the center and can reach far away near the opposing surface. Since the nozzles are shifted by a predetermined time and swirled in the same direction at the same swirling speed, if the fire extinguishing agent collides, it will collide at a fixed position as shown by oblique lines in FIG. By appropriate selection, it is possible to make the collision at the optimum position where the collision does not occur, or even if the collision causes the fire extinguishing agent to be efficiently scattered around, The problem that the fire extinguisher does not reach the location of the above disappears.

[0030]

As described above, according to the present invention, a plurality of monitor nozzles which are separately provided at different positions in a fire extinguishing region of a large space and which are reciprocally swirled or continuously swirled together have the same direction. Or a fire extinguisher in a large space
Multiple reciprocating or continuous turns in the
Since the nozzle has been shifted in the same direction by being shifted by a predetermined time, the fire extinguishing agent can be made to collide with the fire extinguishing agent at an appropriate constant position so that there is no place where the fire extinguishing agent does not reach the entire area. Has an effect that it is possible to effectively spray a fire extinguisher.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a fire extinguishing section in a large space to which the present invention is applied.

FIG. 2 is a front view showing an example of a monitor nozzle that can be used in the present invention.

FIG. 3 is a system diagram showing a hydraulic system that performs turning control and elevation control of a monitor nozzle.

FIG. 4 is a block circuit diagram showing a control circuit that controls the hydraulic system shown in FIG. 3;

FIG. 5 is a flowchart illustrating an operation according to the exemplary embodiment of the present invention.

FIG. 6 is a flowchart illustrating an operation according to another embodiment of the present invention.

FIG. 7 is a flowchart illustrating an operation according to another embodiment of the present invention.

FIG. 8 is a view showing a mode of being sprayed to a fire extinguishing section by the operations shown in FIGS. 6 and 7.

[Explanation of symbols]

 Z Fire extinguishing section G1 to G4 Monitor nozzle 14 Water cannon rotating part 20 Water cannon main body 22 Hydraulic motor for turning (Turning mechanism) 30 Encoder for turning EV EV Electromagnetic switching valve FV Flow control valve OP Hydraulic pump PC Control board CC Control circuit

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toshiaki Okazaki 4-73-3 Kudanminami, Chiyoda-ku, Tokyo Nomi Disaster Prevention Co., Ltd. (56) References JP-A 5-237199 (JP, A) 60-47548 (JP, U) Fully open 60-160851 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A62C 3/00 A62C 27/00-39/00

Claims (2)

(57) [Claims] 1. The fire extinguishing area in a large space has a different
A plurality of monitor nozzles separately provided
In a fire extinguisher that sprays a fire extinguisher while making reciprocating or continuous turning by means of different turning mechanisms, a turning direction control that controls the plurality of turning mechanisms so that each turning direction of the plurality of monitor nozzles is the same direction. A fire extinguisher characterized by comprising means. 2. A fire extinguisher that sprays a fire extinguisher while reciprocating or continuously turning a plurality of monitor nozzles with respect to a fire extinguishing area in a large space. Turning start control means for making each turning direction the same direction, and turning start delay means for shifting the turning start time by the turning start control means of monitor nozzles provided at least at opposing positions of the plurality of monitor nozzles Fire extinguisher characterized by having provided.