JPH0436710B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention provides a flapper that is provided on a nozzle body from which a fire extinguishing agent such as foam or water is discharged so as to be able to freely adjust the discharge direction. This invention relates to a fire extinguishing nozzle that can be adjusted to the extinguishing point and is devised so that the operating force for adjusting the flapper is small.

Prior Art One or two flappers having a U-shaped cross section are pivotally supported at the discharge opening of a nozzle body, and the opening degree of the flapper with respect to the nozzle body is adjusted to generate a discharge flow that collides with the inner surface of the flapper. It is known to control the direction of the extinguishing point, that is, the reach distance and spread. One feature of a single flapper is that it can be discharged to a nearby extinguishing point by adjusting it to sufficiently block the discharge flow; If you try to operate it, you will need an extremely large operating force due to the large impact force of the discharge flow.
Further, there are disadvantages in that it is not possible to obtain a spread that evenly covers the extinguishing point, and it is difficult to extend the discharge distance.

In addition, when two flappers are opened and closed mutually, the discharge distance becomes longer and a discharge flow with less eccentricity with respect to the extinguishing point is obtained.
Discharge at close range becomes difficult, and, like the single flapper described above, the collision force of the discharge flow against the flapper becomes extremely large, resulting in the disadvantage that large force is required for opening and closing operations.

Problems to be Solved by the Invention This invention solves the problem that it is difficult to adjust the perspective of the discharge flow.
Furthermore, this is proposed in order to eliminate the drawback of conventional fire extinguishing nozzles, which require a large amount of force for adjustment.

Means for Solving the Problems In order to solve the above problems, the present invention provides a nozzle body 1 that is connected to a supply source of extinguishing agent.
In this fire extinguishing nozzle, the flapper 3 is pivotally supported by the discharge port 1a of the nozzle body 1 and the discharge direction can be freely adjusted by the discharge direction adjustment mechanism 4. Left and right regulating bodies 7, 7 that regulate the left and right direction of the discharge flow of extinguishing agent discharged from the outlet portion 1a, and a first guide body provided on the left and right regulating bodies 7, 7 so as to cause the discharge flow to collide with the lower surface. 8 and the discharge tip 8a of this first guide 8
The right and left regulating bodies 7, 7 are provided with a narrow gap between them facing each other, and the discharge flow deflected by the first guide body 8 is directed toward the extinguishing point by colliding with the upper surface thereof. A second guide body 9 is formed to cause the deflection to occur again.

Embodiment and Operation Next, an embodiment of the present invention will be described based on the drawings.

Fig. 1 shows a side view of the main parts of the fire extinguishing nozzle, Fig. 2 shows a plan view of the flapper, and Fig. 3 shows a view from arrow A in Fig. 2. The left side is connected to a pump or supply pipe as a supply source of extinguishing agent (not shown), and
If necessary, this nozzle body 1 is configured to be able to move upward and downward and swing to the left and right, for example, around the left side of FIG. Outlet part 1a
The base 3 of the flapper 3 is attached by the fulcrum pins 2, 2.
a is rotatably supported, and by rotating the operating member 5 of the discharge direction adjustment mechanism 4 in the arrow direction about the fulcrum shaft 6, the flapper 3 is moved between the solid line and 2 in the figure. The nozzle body 1 is configured to be held at any rotational position illustrated by the dotted chain line so that the direction in which the extinguishing agent is discharged by the nozzle body 1 can be adjusted.

The flapper 3 in the illustrated example has left and right regulating bodies 7, 7 arranged at intervals so that the tip end 3b side thereof is wider in plan view than the base part 3a;
A first guide body 8 is fixed to the left and right regulation bodies 7, 7 so as to abut most parts of the left and right regulation bodies 7, and bridge the upper edges thereof, and left and right side plates 9a, 9.
A and the bottom plate 9b are formed into a substantially shape when viewed from the front, and the left and right regulating bodies 7, 7 have left and right side plates 9a, 9a.
and a second guide member 9, in which a discharge port B is formed in front of the discharge tip portion 8a of the first guide member 8 in a state where the guide member 9 is fixedly installed. The discharge flow of the fire extinguishing agent discharged from the discharge port 1a of the nozzle body 1 is regulated in the left and right direction by the left and right regulating bodies 7, and is discharged from the discharge port B of the flapper 3. At the release control position where the discharge flow is controlled to be directed to a fire extinguishing point that is a certain distance from the nozzle body 1, the discharge from the discharge port 1a of the nozzle body 1 is as shown by the arrow in FIG. The flow first collides with the lower surface, which is one surface, of the first guide body 8 at a small collision angle α, and is deflected downward in the figure.
Subsequently, it collides with the upper surface of the second guide body 9, which is the surface opposite to the lower surface of the first guide body 8, is deflected upward, and is discharged from the discharge port B toward the extinguishing point. The spread of the discharge flow at this time, that is, the discharge flow pattern a, is modeled and shown by the two-dot chain line in FIG. 6 in plan view.

The collision with the first guide body 8 causes a downward collision force f 1 to act on a position at a distance l ₁ from the fulcrum pin 2, and the collision with the second guide body 9 causes a downward collision force f ₁ to act at a distance l 1 from the fulcrum pin 2. A downward collision force f ₂ acts at position l ₂ .
In this way, moments in mutually opposite directions act on the flapper 3, so that the total moment f ₁ ×l ₁ −f ₂ ×l ₂ can be reduced to approximately zero. As a result, only a small operating force is required to adjust the flapper 3 toward the extinguishing point, and the flapper 3 can be easily directed toward the extinguishing point with a small amount of force. or,
The discharge flow that has successively collided with the first guide body 8 and the second guide body 9 is sufficiently decelerated and is temporarily constricted by the narrow gap, so that the discharge flow is moved to the opening B.
The discharge flow from the fire extinguisher was sufficiently wide to envelop the extinguishing point.

As shown by the solid line in Figure 1, the flapper 3 is
Both guide bodies 8 and 9 are connected to the discharge port 1 of the nozzle body 1.
When held at the fully open position where it is retreated from the front area of point a, the discharge flow is not deflected by the guides 8 and 9, and the spread is small as illustrated by the solid line in Fig. 6, resulting in a discharge distance. This results in a long emission pattern b.

Further, when the first guide body 8 is held in the closed position where it closes the front side of the discharge port 1a as shown in FIG. 5, the discharge flow is directed downward by the first guide body 8 at an angle close to a right angle. The discharge velocity is greatly reduced by the deflection, collides with the second guide body 9 at a substantially right angle, and the discharge flow is directed near the bottom of the guide body 9.
This results in a release pattern C shown by the dotted line in the figure.

Further, the first guide body 8 in the illustrated example has a long main body portion 8.
The front discharge tip 8a is formed in a bent shape with respect to b, and the bottom plate 9b of the second guide body 9 is composed of a front piece 9c and a rear piece 9d, which are bent. When the collision angle α of the discharge flow from the discharge port 1a with respect to the first guide body 8 is small and the discharge position is at a long distance (the flapper 3 is located a little higher than in FIG. 4). The lack of the collision force f ₁ is caused by the collision force f ₃ that acts on the second guide body 9 due to a portion of the discharge flow colliding with the lower surface of the rear piece 9d.
This allows the operating force of the flapper 3 to be small even when the discharge flow is directed to a distant position.

Note that if the collision force f ₂ acting on the second guide body 9 is smaller than the collision force f 1 acting on the first guide body ₈ due to the discharge pressure of the discharge flow, etc., the rear piece 9d
It is also possible to make the bending angle shallow so that the discharge flow hits the upper surface thereof, and a downward impinging flow is generated on the rear piece 9d.

The shape of the flapper 3, that is, the left and right regulating bodies 7, 7,
The shape of the guide bodies 8, 9 may be any shape as long as it satisfies the configuration of the first aspect of the invention described above, and is not limited to the illustrated example.

The illustrated discharge direction adjusting mechanism 4 is an operation in which the left and right regulating bodies 7, 7 of the flapper 3 and the lower part of the operating member 5 are connected by a connecting rod 10, and the fulcrum shaft 6 is pivotally supported and attached to the nozzle body 1. Notch 1 of member guide 11
1a, 11a, . . . is engaged with the operating member 5 by the force of a spring, for example, to lock the operating member 5 in the respective rotational position, and then the lock release knob 12 is engaged. When pressed, the locking pawl escapes from the notch 11a by a link mechanism (not shown), so the lock is released and the operating member 5 can be rotated freely. In addition to the examples shown, various mechanisms can be used.

Effects of the Invention The fire extinguishing nozzle according to the present invention is configured as described above, and includes a discharge port 1 of the nozzle body 1.
The discharge flow discharged from a is regulated from scattering in the left and right direction by the left and right regulating bodies 7, 7, and the lower surface of the first guide body 8 provided on the left and right regulating bodies 7, 7 and the second Since it sequentially collides with the upper surface of the guide body 9,
The discharge flow is decelerated and sufficiently spread by these collision operations, and by adjusting the rotational position of the flapper 3 with respect to the nozzle body 1, the collision angle is adjusted and the discharge flow is The flow is controlled to a desired spread and discharge distance, and the smaller the collision angle at which the discharge flow from the nozzle body 1 collides with the first guide body 8, the more the second guide body 9 The spread of the discharge flow is small and can reach long distances, and conversely, as the collision angle increases, the spread of the discharge flow increases, making it effective for extinguishing fires at close range. By adjusting the discharge direction of the flapper 3, the guide bodies 8, 9 can freely control the arrival position of the discharge flow in a far or near direction. Since the collision force acting on the lower surface of the first guide body 8 and the collision force acting on the upper surface of the second guide body 9 are in opposite directions, the moments due to these collision forces cancel each other out. As a result, the moment due to the total collision force acting on the flapper 3 becomes extremely small, and the operating force required to adjust the flapper 3 toward the extinguishing point is small, so that the flapper 3 can be moved slightly. easily with great force,
Moreover, it became possible to quickly direct the fire to the extinguishing point.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a plan view of the flapper, Fig. 3 is a view taken in the direction of arrow A in Fig. 2, and Figs. 4 and 5 are the flapper. FIG. 6 is a plan view of the discharge pattern. Description of symbols, 1... Nozzle body, 1a... Discharge opening, 2... Fulcrum pin, 3... Flutter 3a...
Base, 3b...Tip, 4...Discharge direction adjustment mechanism, 5...Operation member, 6...Fully shaft, 7...Right and left regulators, 8, 9...Guide, 8a...Discharge tip, 8b... Main body part, 9a... Left and right side plates, 9b...
...Bottom plate, 9c...Front piece, 9d...Rear piece, 10
...Connection rod, 11...Operation member guide, 11a...
...Notch, 12...Lock release knob, B...Opening, a, b, c...Release pattern, _f1 , _f2 ...Collision force, _l1 , _l2 ...Distance, α...Collision angle .

Claims (1)

[Scope of Claims] 1. A nozzle body that is connected to a supply source of extinguishing agent, and a nozzle body that is pivotally supported by the discharge port of the nozzle body and that can be freely inserted and removed in front of the discharge port by a discharge direction adjustment mechanism. In a fire extinguishing nozzle equipped with a movable flapper, the flapper has a first movable flapper.
and a second guide body are provided above and below with a gap that serves as a passage for the extinguishing agent, and the first and second guide bodies are
When the flapper is located in front of the discharge port, the second guide is located at a position where the first guide directly receives the discharge flow of extinguishing agent from the discharge port on its lower surface. A fire extinguishing nozzle characterized in that each of the fire extinguishing nozzles is disposed at a position where its upper face receives the ejected flow of the fire extinguishing agent that collides with the lower face of the first guide member and changes its direction downward. 2 The first guide body has an F-shape in side view, and the second
The guide body has an inverted U-shape when viewed from the side, and is provided so that the front end side of the first guide body and the rear end side of the second guide body overlap with each other with a passage for the extinguishing agent. A fire extinguishing nozzle according to claim 1.