JP3165476B2 - 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 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.

For this reason, a fire extinguisher has been proposed in which a fire extinguishing agent such as water, foam, powder or the like is radiated while turning a monitor nozzle to spray the fire extinguishing agent over a wide fire extinguishing section.

[0005] In such a fire extinguisher, a fire extinguishing agent can be sprayed over a wide range.
Due to the nature of the monitor nozzle, the width is fan-shaped or circular,
In other words, the width is the band width of the reach of the fire extinguishing agent radiated from the monitor nozzle. For this reason, it cannot be spread over a wide fan-shaped portion or almost the entire region from the installation position of the monitor nozzle to the maximum reach of the monitor nozzle.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a fire extinguisher capable of discharging a fire extinguishing agent over substantially the entire area of a fan or circle from the installation location of the monitor nozzle to the maximum range of the extinguishing agent. Is to provide.

According to the present invention, there is provided a fire extinguisher in which a monitor nozzle is reciprocated or continuously swirled by a swivel mechanism to spray a fire extinguishing agent into a fire extinguishing section. A range changing means for changing the range of the agent is provided, and the range changing means changes the range of the fire extinguishing agent by interlocking with the turning mechanism during the reciprocating or continuous turning of the monitor nozzle by the turning mechanism. A fire extinguishing device characterized by controlling is provided.

[0008]

[Function] During the turning of the monitor nozzle by the turning mechanism,
The range changing means interlocked with the turning mechanism changes the elevation angle of the monitor nozzle, relatively changes the position of the deflector of the monitor nozzle, changes the discharge pressure or flow rate, and changes the fire extinguishing agent by the monitor nozzle. By changing the range, the fire extinguishing agent radiated from the monitor nozzle can spray the fire extinguishing agent in a band-like area far from the monitor nozzle when the range is long, and near the monitor nozzle when the range is short. Fire extinguisher, which allows
A fire extinguishing agent can be sprayed on a large fan-shaped or circular fire extinguishing section centered on the monitor nozzle. Moreover, since the switching of the range is performed in conjunction with the rotation of the monitor nozzle,
The turning of the monitor nozzle does not stop due to the switching of the range.

[0009]

An embodiment of the present invention will be described below.

FIG. 1 is a view showing a fire extinguishing section Z in a large space to which the present invention can be applied, in which four monitor nozzles (also called water cannons or water cannons, fire extinguishing guns) G1 to G4 are arranged. When a fire occurs in the fire extinguishing section Z, each of the monitor nozzles G1 to G4 swings right and left by a hydraulic motor (or an electric motor) in a semicircular shape while spraying a fire extinguishing agent such as water, foam, powder, or the like. The fire extinguishing section Z is extinguished. In this case, in this embodiment, each monitor nozzle performs spraying while being controlled to be switched in two stages: an inner circle area from the center of each semicircle to the dotted line and an outer circle area from the dotted line to the solid line. .

The monitor nozzles G1 to G4 used here
Is called, for example, "water cannon fire extinguisher"
For example, as shown in FIG. 2 described in Japanese Utility Model Application No. Hei 3-22011 filed on May 5, and Japanese Utility Model Application No. Hei 3-28113 filed on Apr. 23, 1991 with the same name. It may be something. In FIG. 2, the variable spray nozzle 10 is fitted and fixed in a nozzle mounting portion 18, and the nozzle mounting portion 18 is vertically rotated by the elevating shaft support portion 20 to the water discharge conduit 30 of the water discharge gun rotating portion 24. It is supported so as to be movable. Elevating expansion / contraction means 22 is attached to the water cannon rotation part 24, and one end of the elevating expansion / contraction means 22 is connected to a link 22.
a to the nozzle mounting portion 18 via a shaft supporting portion 18a.
Numeral 0 can be turned up and down by expansion and contraction of the elevating expansion / contraction means 22. The water cannon rotating part 24 is fitted to the water cannon main body 26 and is rotatably mounted by a turning hydraulic motor 28.

With this configuration, the nozzle 10 moves the monitoring area in the horizontal direction, that is, the turning direction, by rotating the water discharge gun rotating unit 24 with respect to the water discharge gun main body 26 by the hydraulic motor 28 for turning. The telescopic unit 22 can be raised and lowered in the vertical direction by extending and retracting the telescopic unit 22 with a hydraulic motor 23 for raising and lowering (in FIG. 2, it is located behind the telescopic unit 22 for raising and cannot be seen). For example, when a fire extinguishing agent is released due to a fire or the like, water from a water supply source (not shown) passes through a water discharge gun main body 26 and a hollow portion (not shown) of a water discharge gun rotation unit 24, and then the water discharge gun rotation unit 24. Reaches the hollow portion of the nozzle 10 through the water discharge pipe 30 fixedly attached to the
0 is released from the outer case 14.

The variable spray nozzle 10 includes a nozzle body 12
An outer box 14 slidably fitted to the nozzle body 12,
Hydraulic cylinder 1 for a variable spray nozzle fixed to nozzle body 12 with a piston means having one end attached to outer box 14 for taking the outer box 14 into and out of nozzle body 12
The water discharge is sprayed when the outer case 14 is moved in the direction of inserting the nozzle 14 into the nozzle body 12 by the variable spray nozzle hydraulic cylinder 16, and when the outer case 14 is moved in the withdrawal direction, the water discharge is narrowed. The water spraying shape can be changed by moving the outer box 14 into and out of the nozzle body 12 by using the variable spray nozzle hydraulic cylinder 16.

Further, the monitor nozzle shown in FIG. 2 is provided with a turning encoder 32 for detecting the rotation angle of the water discharge gun turning section 24 by the turning hydraulic motor 28, that is, the rotation angle of the nozzle in the turning direction. Further, an elevation encoder 34 for detecting a vertical rotation angle of the nozzle mounting portion 10 by the elevation expansion / contraction means 22, that is, an elevation angle, is mounted. Further, as shown in FIG. A watering shape detecting means 40 including a proximity switch 36 and a metal bar 38 attached to the outer case 14 is provided so that the watering shape can be known from the degree of fitting of the outer case 14 to the nozzle body 12. I have. The proximity switch 36 and the metal bar 38 are not shown in FIG. 2 because they are located behind the variable spray nozzle 10.

FIG. 4 shows a turning hydraulic motor 28 for turning the water discharge gun turning section 24 of the monitor nozzle G1 and a raising hydraulic motor 23 for expanding and contracting the raising / lowering expansion means 22.
Also, a hydraulic system for urging the variable spray nozzle hydraulic cylinder 16 is shown. The hydraulic system is
In this embodiment, turning the encoder 32 and the elevation encoder 34 described above, and while receiving the signal from the water spray shape detecting unit 40, a monitor nozzle G1 controls the swing hydraulic motor 28 by the electromagnetic selector valve EV ₁ head to swing pivot, by elevating the monitor nozzle G1 controls the elevation hydraulic motor 23 by the electromagnetic switching valve EV _2, the electromagnetic switching valve EV ₃
By controlling the hydraulic cylinder for switching, that is, the hydraulic cylinder 16 for the variable spray nozzle, the degree of fitting of the outer box 14 into the nozzle body 12 is changed to change the watering shape. With respect to the variable spray nozzle hydraulic cylinder 16, the electromagnetic switching valve EV ₃ and the hydraulic pressure are controlled so that the degree of fitting of the outer case 14 to the nozzle body 12 does not change due to the discharge pressure of the fire extinguishing agent when the fire extinguishing agent is discharged. A pilot-operated check valve PV is provided between the cylinder 16 and the fitting so that the fit between them is held fixed in its selected position during the extinguishing of the extinguishing agent. Note that the configuration and operation of the hydraulic system are the same for the other monitor nozzles G2 to G4, and therefore illustration and description are omitted in FIG.

Hereinafter, the operation of the present embodiment will be described with reference to the flowcharts shown in FIGS.
In the following description of the operation, for the sake of simplicity, it is assumed that the water cannon is rotated only in the turning direction while changing the watering shape, and a case in which the elevating operation is not performed will be described. In this case, the turning hydraulic motor 28 is used as a turning mechanism for turning the monitor nozzle in the turning direction, and the variable spray nozzle hydraulic cylinder 16 is used as a range changing means for switching the range of the fire extinguishing agent. Shall be

When a fire occurs and a signal of a fire area or a signal from an emergency switch is input to the control panel from a fire receiver, a control circuit (not shown) having a microcomputer, for example, of the control panel firstly operates. (step outputs an instruction to the watering shape, as shown in C of the short-range instruction ie Figure to electromagnetic switching valve EV ₃ of the hydraulic cylinder 16 of the firing range switching the monitor nozzle G1 and G4 3 to diffuse form 102), the electromagnetic switching valve EV of the hydraulic cylinder 16 for switching the range in the monitor nozzles G2 and G3.
₃ , a long-range command, that is, a command to make the watering shape rod-shaped as shown in FIG. 3A is output (step 104).
Then, a fire extinguishing agent discharge command is issued to all of the monitor nozzles G1 to G4 (step 106), and a right turn command is issued (step 108).

Thus, the monitor nozzles G1 and G4
Performs spraying of the fire extinguishing agent on the inner circle area from the center of each semicircle to the dotted line in the fire extinguishing section Z shown in FIG. 1, and the monitor nozzles G2 and G3 The fire extinguishing agent is sprayed on the outer circle area from the dotted line to the solid line, and this is shown by the shaded lines in FIGS. 7A, 7B and 7C. 7A shows the area sprayed when each of the monitor nozzles G1 to G4 turns to half of the turning range, B shows the area sprayed when turning the other half, and C shows one turning range. The area sprayed when turning over is shown.

While each of the monitor nozzles G1 to G4 keeps turning, a control circuit (not shown) reads a signal representing the turning angle from the turning encoder 32 of each monitor nozzle (step 110), and each monitor nozzle receives the signal. It monitors whether the turning range limit has been reached. In the control circuit, the right turn limit and the left turn limit are set and stored in advance so that each monitor nozzle sprays the fan-shaped region of the inner circle region or the outer circle region illustrated in FIGS. 1 and 7. I have. In such a setting storage method, a memory for storing these limits may be incorporated in the control circuit, or a setting means that can be manually set such as a dip switch may be used.

The control circuit constantly compares, for each monitor nozzle, the signal from the turning encoder 32 with a corresponding limit that is set and stored in advance, whereby
If it is determined that the monitor nozzle that is turning right (turning left) has reached the limit of turning right (turning left) (step 11).
2 and 114, 118 and 120, 124 and 126,
And 130 and 132), as well as switching control an electromagnetic switching valve EV ₁ hydraulic system to shift to the left pivot stop right turn (left turn) (right turn), the hydraulic system electromagnetic switching valve EV ₃ is switched to switch the watering shape (steps 116, 122, 128 and 134). That is, in the case of the monitor nozzle G1 and G4, the watering shape as shown in the firing range of the switching of the hydraulic cylinder 16 electromagnetic change against valve EV ₃ from the short-range order of the switched example 3 in long range instruction A Output a command to make a bar (Step 1
16 and 134), in the case of the monitor nozzles G2 and G3, the electromagnetic switching valve E of the hydraulic cylinder 16 for switching the range.
FIG switched to a short-range instruction from the long-range command to V ₃ 3
Then, a command to make the watering shape diffuse is output as shown in FIG.

In the fire extinguishing section Z, as shown by the shaded lines A, B, and C in FIG. 8, the monitor nozzles G2 and G3 extend from the center of each semicircle to the dotted line, contrary to the case of FIG. And the monitor nozzles G1 and G4 in the fire extinguishing section Z spray the fire extinguishing agent on the outer circle area from the dotted line to the solid line of each semicircle.
As in the case of FIG. 7, A in FIG.
4 is the area sprayed when turning to half of the swivel range, B is the area sprayed when turning after the other half, and C is spread when swirling over one turning range. Each area is shown.

In this manner, each of the monitor nozzles G1 to G
No. 4, the fire extinguishing section Z keeps spraying while turning while the fire extinguishing section Z is alternately switched between the inner circle area and the outer circle area until the fire extinguishing is completed (step 136). If it is determined that the fire extinguishing has been completed (YES in step 136), a discharge stop command is issued to the monitor nozzles G1 to G4 (step 138). Next, a stop command is issued when the monitor nozzle reaches a predetermined position. Is issued (step 140), and a first standby state is set.

In the above embodiment, the range changing means includes:
Although the range is changed by changing the water spray shape by the variable spray nozzle hydraulic cylinder 16, the range changing means is not limited to this. For example, the nozzle is raised by the hydraulic motor 23 for raising. The range can be changed by changing the angle, and the range can be changed by changing the discharge pressure or flow rate of the fire extinguisher.

[0024]

As described above, according to the present invention, during the turning of the monitor nozzle by the turning mechanism, the range changing means interlocked with the turning mechanism changes the range of the fire extinguishing agent discharged from the monitor nozzle. As a result, the fire extinguishing agent radiated from the monitor nozzle can be sprayed in a belt-like area far from the monitor nozzle at long range, and near the monitor nozzle at short range. Can be
Thus, there is an effect that the fire extinguishing agent can be sprayed over a wide area of the fire extinguishing section without gaps in a fan-shaped or circular area centered on the monitor nozzle.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a fire extinguishing compartment 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 view showing the degree of fitting between the outer case of the monitor nozzle shown in FIG. 2 and the nozzle body and the shape of water spray of the fire extinguishing agent discharged from the monitor nozzle at each degree of fitting.

FIG. 4 is a system diagram showing a hydraulic system for controlling the turning and raising of the monitor nozzle and controlling the shape of water spray.

FIG. 5 is a flowchart illustrating the operation of the present invention.

FIG. 6 is a flowchart illustrating the operation of the present invention.

FIG. 7 is a view showing a mode of being sprayed to a fire extinguishing section by the operations shown in FIGS. 5 and 6.

FIG. 8 is a view showing a mode of being sprayed to a fire extinguishing section by the operations shown in FIGS. 5 and 6.

[Explanation of symbols]

Z Fire extinguishing section G1 to G4 Monitor nozzle (water spray gun) 10 Variable spray nozzle 12 Nozzle body 14 Outer box 16 Variable spray nozzle hydraulic cylinder (range changing means) 22 Elevating telescopic means 23 Elevating hydraulic motor 24 Spray gun rotating part 26 water cannon body 28 swing hydraulic motor (turning mechanism) 32 for turning the encoder 34 of elevation encoder EV ₁ ~EV ₃ electromagnetic switching valve 40 water spray shape detecting means

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-117772 (JP, A) JP-A-2-177971 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A62C 35/00-37/50 A62C 31/03

Claims (1)

(57) [Claims] 1. A fire extinguisher which sprays a fire extinguishing agent on a fire extinguishing section by reciprocatingly or continuously turning a monitor nozzle by a turning mechanism, wherein a range changing means for changing a range of the fire extinguishing agent discharged from the monitor nozzle is provided. A fire extinguisher which controls the range of the fire extinguisher by changing the range of the fire extinguisher by interlocking with the turning mechanism during the reciprocating turning or continuous turning of the monitor nozzle by the turning mechanism.