JP3469039B2 - Fire helicopter drainage system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a liquid extinguishing device for a fire extinguishing liquid, which is attached to a fire helicopter engaged in fire extinguishing work in the case of a forest fire or an urban fire.

[0002]

2. Description of the Related Art FIGS. 6 and 7 are front views of a conventional discharge device for a fire fighting helicopter. The helicopter of FIG. 6 is a bucket B containing a fire extinguishing liquid suspended from the lower surface, and the helicopter of FIG. Clearance) G, fire extinguishing liquid tank T
It is equipped with.

[0003]

However, in the case of FIG. 6, the suspended bucket B sways during flight, which adversely affects the maneuverability of the helicopter, and also causes the bucket B to become overgrown on the ground. There is a problem in that the safety of flight is hindered by being caught. In the configuration of FIG. 7, stability and safety of flight are secured, but in a recent helicopter that adopts a retractable leg to reduce air resistance, such a fire extinguishing liquid is used because the ground clearance G is small. Since the tank T cannot be equipped, a hanging bucket must be adopted.

[0004]

According to the present invention, there is provided a fire extinguishing liquid tank mounted on both left and right side surfaces of a helicopter, a liquid discharge door and a liquid discharge duct arranged on a lower surface of each tank, and The liquid discharge door and the liquid discharge duct are connected to a common actuator via a link mechanism, the tanks are connected to each other by a connecting pipe in the lower part, and the liquid amounts in the tanks are substantially equal to each other . Previous
When the discharge door is opened, the discharge duct is diagonally downward.
Fire extinguishing liquid discharged from the discharge duct
The above-mentioned problems have been solved by a discharge device of a fire-fighting helicopter, which is characterized in that the merging is made in the vicinity of the center of the airframe and drops downward .

According to an embodiment of the present invention , a water supply port is provided at the tip.
Install the hose with the pump to the connecting pipe through the rotary joint.
There is something attached . As a result, it is possible to supply the fire extinguishing liquid into the tank 2 while hovering, or to supply water from a river or lake. In addition, by allowing the liquid discharge duct to be stored in the ground clearance of the helicopter, it can be installed in a helicopter with a small ground clearance.

[0006]

DETAILED DESCRIPTION OF THE INVENTION

(Regarding Overall Structure) FIG. 1 shows a front view of a helicopter equipped with left and right discharge devices 1, 1 for a fire fighting helicopter of the present invention, and FIG. 2 is a bottom view thereof. This fire-fighting helicopter discharge device 1,1 is arranged on both sides of the tanks 2 and 2 for storing the fire-extinguishing liquid and the lower surfaces of the tanks 2 and 2, and guides the fire-extinguishing liquid when discharging the liquid. Fixed duct 4,
4 and movable discharge ducts 5 and 5, and tanks 2 and 2
Are attached to the left and right side surfaces of the helicopter by the mounting brackets 19, 19.

A quadrangular pyramid-shaped cover C covering the left and right ends is attached to each tank 2. The cover C is a mere cover, and the point is that the cover C covers a portion of the link mechanism of the liquid discharger 1 of the present invention, which will be described later, protruding to the outside of the tank 2, and is not limited to the illustrated shape. . Further, notches are provided at necessary portions so as not to disturb the operation of the link mechanism.

In the gap between the lower surface of the fuselage of the fuselage and the ground, (movable) discharge ducts 5 and 5 extend from the lower surfaces of the left and right tanks 2 and 2 through fixed ducts 4 and 4 toward the center of the fuselage. Further, a connection pipe 16 (see FIG. 2) that connects the lower portions of the left and right tanks 2 and 2 and connection rods 14 and 14 (see FIG. 3) are arranged. The connecting pipe 16 connects the left and right tanks 2 and 2, and the connecting rods 14 and 14 are connected to the link mechanism of the left and right liquid discharge devices 1 and 1 described later. A rotary joint 24 to which a hose 17 is connected is attached in the middle of the connecting pipe 16, and a liquid supply pump 18 is attached to the tip of the hose 17. The rotary joint 24 is rotatable about the axis of the connecting pipe 16,
1 attached to the rotary joint 24 by the rotation of the
The liquid supply pump 7 and the liquid supply pump 18 can be suspended below the fuselage (see FIG. 1) or stored along the body of the fuselage (see FIG. 2).

For the liquid discharge from the tanks 2 and 2 of the liquid discharge devices 1 and 1 and the liquid supply to the tanks 2 and 2, an operator operating the helicopter operates a switch of a control plate 25 in the helicopter. Done by.

The connecting rods 14, 14 extending from the left and right tanks 2, 2 are connected to a common actuator 23 at the center of the lower surface of the machine body. Actuator 2
3 is a hydraulic type or an electromagnetic type, and the left and right connecting rods 1
4 and 14 are operated at the same timing. As a result, the operation timings of the link mechanism for discharging liquid, which will be described later, in the liquid discharging devices 1 and 1 attached to the left and right of the machine body are also equal.

(Regarding connection of constituent parts) FIG.
FIG. 4 is a longitudinal sectional view of the liquid discharge device 1 attached to the right side surface of the helicopter shown in FIG. 1, and FIG. 4 is a perspective view. In Figure 4,
The quadrangular pyramid-shaped cover C that covers the end of the tank 2 is omitted,
In addition, the inside of the tank 2 is also drawn by a solid line to facilitate the description of the structure.

The tank 2 has a rectangular parallelepiped shape, and a fixed duct 4 is attached to the lower surface of the tank 2, and a (movable) liquid discharge duct 5 is vertically movable via a bellows 6 by a hinge 15 on the fixed duct 4. Installed. Since the liquid discharge duct rod 10 must be attached to the liquid discharge duct 5 as described later, the left end part is wider than the right end part in FIG. The tip of the liquid discharge duct 5 does not necessarily have to be open over the entire surface, and for example, only the vicinity of the liquid discharge duct rod 10 is opened,
The liquid may be intensively discharged from there.
A liquid discharge door 3 that is in close contact with the tank 2 with a door seal 12 is attached to a door hinge 20 in a fixed duct 4 attached to the lower surface of the tank 2.

The torque shaft 1 is arranged in the longitudinal direction of the tank 2.
1 penetrates. Inside the tank 2, the liquid discharge doors 3 are attached to the torque shaft 11 through two sets of door links 7 and 7 and door rods 9 and 9, and outside the tank 2, on the other hand, the liquid discharge door 3 is attached. The liquid discharge duct 5 is attached through the duct link 8 and the liquid discharge duct rod 10, and the other is connected to the connection link 13 and the connection rod 14.
It is connected to the actuator 23 via. Each link portion connected to the torque shaft 11 is non-rotatably fixed, and the other link portions are rotatably connected. Therefore, when the torque shaft 11 rotates, the door link 7 and the door rod 9 are interlocked to open and close the liquid discharge door 3, and along with that, the liquid discharge duct link 8 and the liquid discharge duct rod 10 are interlocked to discharge. The liquid duct 5 can be moved up and down.

A liquid supply port 21 and an intake / exhaust port 22 are provided on the upper surface of the tank 2 to supply and intake / exhaust liquid.

(Regarding the whole operation) As shown in FIG. 1, the liquid discharge ducts 5 and 5 until reaching the place where the liquid should be discharged.
Is stored in a ground clearance below the machine body so as to be folded, and the liquid discharge doors 3 and 3 are closed. When the operator turns on the drop switch of the control plate 25 (see FIG. 2) installed in the cockpit of the helicopter, the actuator 23 operates and the left and right connecting rods 14 and 14 simultaneously operate, respectively. Connection link 1
The torque shaft 11 penetrating the inside of the tanks 2 and 2 via the rollers 3 and 13 is rotated. When the torque shaft 11 rotates, the liquid discharge door 3 is opened via the door links 7 and 7 and the door rods 9 and, and at the same time, the liquid discharge duct 5 is opened via the liquid discharge duct link 8 and the liquid discharge duct rod 10. Pointed diagonally downward. When the liquid discharge door 3 is opened, the liquid discharged from the tank 2 reaches the liquid discharge duct 5 through the fixed duct 4 and is discharged obliquely downward from here.

FIG. 5 shows a state in which the fire extinguishing liquid discharged from the left and right liquid discharge devices 1 and 1 attached to the helicopter in flight is dropped. The fire extinguishing liquid discharged from the left and right tanks 2 and 2 is fixed ducts 4 and 4 and liquid discharge ducts 5 and 5.
It merges in the vicinity of the center of the airframe and falls downward. In this way, since the fire extinguishing liquid discharged from the left and right discharge ducts 5 and 5 joins and drops at almost one place,
It is possible to carry out reliable fire fighting activities and improve the efficiency of fire fighting activities.

(Regarding method of supplying liquid into the tank) Normally, the tanks 2 and 2 are supplied with a fire extinguishing liquid from the liquid supply port 21 on the ground before flight. With the supply of the liquid, the air in the tank 2 is exhausted to the outside from the intake / exhaust port 22. Even if the liquid is supplied from one of the left and right tanks 2, the liquid flows into the tank 2 on the opposite side through the connecting pipe 16, so that the liquid amounts in the left and right tanks 2, 2 are not biased. Also, while hovering, tank 2
When supplying fire extinguishing liquid to the inside or supplying water from rivers, lakes, etc., make sure that the liquid supply pump 18 incorporated at the tip of the hose 17 is hung from the lower surface of the machine and supply it with the liquid supply pump 18. Do the liquid.

[0018]

In the liquid discharge device for a firefighting helicopter according to the present invention, the tanks are arranged on both side surfaces of the machine body, so that the problems of the conventional bucket suspension type and the under-body model equipped tank can be solved.

Moreover, since the connecting rods of the left and right liquid discharging devices are connected to a common actuator, the timings of liquid discharging from the respective tanks are equal, and the liquid discharged from the left and right liquid discharging devices is approximately the same amount. Becomes Therefore, even if the liquid is discharged during the flight, the center of gravity of the helicopter does not move, and the stability of the flight can be secured. Also,
By connecting the inside of the left and right tanks with the connecting pipe, even if liquid is supplied from one tank, the liquid flows into the other tank through the connecting pipe and the liquid in the left and right tanks is always kept at the same volume. be able to.

By allowing the liquid discharge duct to be housed in the ground clearance of the helicopter, it is possible to accommodate a retractable leg helicopter having a small ground clearance.

[Brief description of drawings]

FIG. 1 is a front view of a helicopter equipped with a discharge device for a firefighting helicopter according to the present invention.

2 is a bottom view of the helicopter of FIG. 1. FIG.

FIG. 3 is a vertical cross-sectional view of a main part of a discharge device of a firefighting helicopter that is attached to the right side surface of the helicopter.

FIG. 4 is a perspective view of a main part of a discharge device of a firefighting helicopter attached to the right side surface of the helicopter.

FIG. 5 is a diagram showing a discharge state of a fire-extinguishing liquid of a helicopter equipped with a liquid discharge device for a firefighting helicopter according to the present invention.

FIG. 6 is a view showing a conventional discharge device of a firefighting helicopter.

FIG. 7 is a view showing another conventional liquid discharge device for a fire helicopter.

[Explanation of symbols]

1: Fire-fighting helicopter discharge device 2: Tank 3: Discharge door 5: Discharge duct 16: Connection piping 17: Hose 18: Water supply pump 23: Actuator 24: Rotary joint

Claims (3)

(57) [Claims] 1. A fire extinguishing liquid tank mounted on both left and right side surfaces of a helicopter, and a liquid discharge door and a liquid discharge duct arranged on a lower surface of each tank, wherein the liquid discharge door and the liquid discharge duct are provided. are connected to a common actuator via a link mechanism, wherein each tank is connected to each other by a connecting pipe at the bottom, the liquid amount in each tank has become substantially equal, the discharge liquid door is opened Tato
When the discharge duct is directed diagonally downward,
The fire extinguishing liquid discharged from the
Discharge device for firefighting helicopters, characterized by merging and dropping downward . 2. The liquid discharge device for a firefighting helicopter according to claim 1, wherein a hose having a water supply pump attached to its tip is attached to the connecting pipe through a rotary joint. 3. The liquid discharging device for a fire fighting helicopter according to claim 1, wherein the liquid discharging duct can be stored in a ground clearance of the helicopter.