JP2654246B2 - High speed fire boat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a high-speed fire fighting boat engaged in fire fighting for ship fires, and more particularly to a high-speed fire fighting boat propelled by water jet.

(Prior Art) Firefighters are playing an active role in extinguishing fires on ships or marine structures. This fire boat is equipped with powerful fire fighting equipment, including a large fire pump. Conventionally, as a propulsion system for this type of fire boat, a system in which a propeller is rotated by a main engine such as a diesel engine and the propeller is propelled by thrust generated by the propeller has been adopted.

(Problems to be Solved by the Invention) First of all, a fire boat that needs to arrive at a fire spot as soon as possible is required to be able to navigate at high speed. However, conventional propeller propulsion has its own limitations in improving ship speed.

In recent years, a new propulsion system using thrust by a water jet has been developed, and has been adopted in various small vessels, for example, small high-speed security boats. In this propulsion system, thrust generated when pressure water is injected from a water jet pump is used as the propulsion force of the ship, and high-speed navigation is possible.

By the way, when the scale of the ship fire is large, the heat sometimes prevents the fire boat from approaching. Therefore, it is desirable to use a water jet pump as a fire pump to discharge water at a distance from a fire site. However, there is a drawback in that the hull cannot be stopped by the recoil that gushes the pressure water.

Accordingly, the present invention solves the above-mentioned problems of the prior art, uses a water jet pump for both propulsion and fire extinguishing, enables high-speed navigation, and allows a hull to stand still during fire extinguishing activities. The purpose is to provide a fire boat.

[Configuration of the invention]

(Means for solving the problem) A water jet pump is provided as a propulsion drive source,
A casing having a navigation outlet and a fire extinguishing nozzle integrated with the casing, and a valve for switching a jetting direction of high pressure water output from the water jet pump between a stern direction and a direction of the fire extinguishing nozzle. A water discharge switching device having a body incorporated in the casing is provided on both sides of the stern of the hull.

(Operation) According to the present invention, at the time of navigation, the high-pressure water output from the water jet pump is jetted to the rear of the stern, and the thrust generated at this time allows the high-speed fire boat to navigate at high speed. On the other hand, in the case of fire extinguishing activity, the flow direction of the high pressure water is switched by the water discharge switching device, and the high pressure water output from the water jet pump is jetted from the fire extinguishing water discharge nozzle. Since the water discharge switching devices are provided on both sides of the stern of the hull, by discharging water from the fire extinguishing water discharge nozzles on both sides, the recoil at the time of water discharge is cancelled, and the position of the hull is maintained.

(Embodiment) An embodiment of a high-speed fire boat according to the present invention will be described below with reference to the accompanying drawings.

1 and 2, reference numeral 10 indicates a high-speed fire fighting boat according to the present embodiment. In this high-speed fire boat, water jet propulsion is adopted as the propulsion method, and the water jet is used for fire extinguishing. FIG. 1 shows the high-speed firefighting boat 10 in flight, and FIG. 2 shows the high-speed firefighting boat 10 discharging water during a fire fighting operation. Reference numeral 11 denotes a hull, and water jet pumps 12, 12 are disposed inside the hull 11 on the starboard side and port side, respectively. The water jet pumps 12, 12 are driven by motors 13, 13, respectively. The high-pressure water generated by the water jet pumps 12, 12 is jetted through water discharge switching devices 14, 14, which are arranged on both sides of the stern of the hull 11, respectively. In addition, as the water jet pump 12,
A well-known type is adopted, in which seawater is sucked from an intake duct 15 opening to the bottom of the ship, and an impeller 17 in a casing 16 is turned to generate a high-pressure water jet.

3 and 4 are cross-sectional views showing the configuration of the water discharge switching device 14. As shown in FIG. FIG. 3 shows a state in which a water jet is jetted for propulsion, and FIG.
This shows a state in which a water jet is being blown out for fire extinguishing. Inside the casing 18 of the water discharge switching device 14, a valve body 19 for switching the jetting direction of the water jet between navigation and fire extinguishing work is hinged to the casing 18 so as to be rotatable, and the navigation water discharge port 20 and The fire extinguishing water discharge nozzle 21 provided in the casing 18 is opened and closed. In this case, the navigation outlet 20 is arranged coaxially with the pump shaft of the water jet pump 12, and opens with a diameter larger than the diameter of the outlet 18a of the casing 18. On the other hand, the fire extinguishing water discharge nozzle portion 21 is arranged so that its axis is orthogonal to the pump axis of the water jet pump 12, and its tip is narrowed so that the pressure water can fly far away. I have.

Such a water discharge switching device 14 is mounted so as to be able to rotate on the same axis as the pump shaft of the water jet pump 12 and copper, whereby the angle formed by the axis of the fire extinguishing water discharge nozzle portion 21 with respect to the horizontal direction, That is, the elevation angle can be set arbitrarily. In this embodiment,
The valve element 19 is connected to the entire operation actuator 23 via a wire 22.
It is connected to. Reference numeral 24 indicates the valve body 19 when the fire is extinguished.
And a packing for sealing between the spillway 20 and the navigation outlet 20.

When the high-speed fire fighting boat 10 configured as described above travels, the fire extinguishing water discharge nozzle 21 is closed by the valve element 19.
The pressurized water generated by the rotation of the impeller 17 by the water jet pump 12 is jetted straight out of the navigation outlet 20 toward the stern. The thrust generated at that time is applied to the hull 11 via a mounting flange (not shown) of the casing 16. In this way, the high-speed fire boat 10 can navigate on a much faster boat foot than conventional propeller propulsion, so that it can quickly rush to the fire spot.

When the high-speed fire fighting ship 10 rushes to the fire spot as described above and starts fire extinguishing activity, the water jet pump 12 is temporarily stopped, and then the valve operating actuator 23 is operated.
Is operated to switch the position of the valve element 19 of the water discharge switching device 14 to the side on which the navigation water discharge port 20 is closed. Thus, when the water jet pump 12 is restarted, the pressurized water is discharged from the fire extinguishing water discharging nozzle 21 toward the ship where the fire has occurred. In this case, since the water is discharged by the output of the water jet pump 12 having a high output, the reach of the water can be extended as compared with the conventional fire pump. Therefore, effective fire extinguishing activities are possible even when the fire is large and the heat does not allow a fire boat to approach nearby. In addition, since a large fire pump and a prime mover thereof are not required to extend the reach of water discharge, the equipment can be simplified.

Further, at the time of this fire extinguishing work, as shown in FIG. 5, if the elevation angle of the fire extinguishing water discharge nozzle portion 21 is set to be equal on both sides and water is discharged simultaneously,
Since the stern does not turn because the recoil generated by discharging water from each other cancels each other, firefighting activities can be performed in a stable state of the hull position.

〔The invention's effect〕

As apparent from the above description, according to the present invention, a casing having a navigation water discharge port, a fire extinguishing water discharge nozzle unit integrally formed with the casing, and a jetting direction of high-pressure water output from the water jet pump is stern. By a water discharge switching device built in the casing, a valve body that switches between the direction and the direction of the fire extinguishing water discharge nozzle portion,
Since the water jet pump can be used for both propulsion and fire extinguishing, a higher navigation speed than conventional propeller propulsion can be obtained, and the reach of water discharge at the time of fire extinguishing can be greatly extended, making it unnecessary to use a fire pump. There is an advantage. In addition, since water discharge switching devices with fire extinguishing water discharge nozzles are provided on both sides of the stern, water is discharged from each fire extinguishing water discharge nozzle so that the recoil due to water discharge is balanced, stabilizing the position of the hull and firefighting It has the effect of continuing activities.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a high-speed fire fighting ship according to an embodiment of the present invention when the ship is propelled by a water jet, and FIG. Side view, partially cut away, when switched to water discharge. FIG. 3 is a longitudinal sectional view of a water discharge switching device switched for high-speed fire boat navigation. FIG. 4 is switched to fire extinguishing for high-speed fire boats. FIG. 5 is an explanatory view showing the elevation angle of the fire-extinguishing waterproof nozzle when the high-speed fire-fighting boat is engaged in fire-fighting activities. 10 ... High-speed fire boat, 11 ... Hull, 12 ... Water jet pump, 13 ... Motor, 14 ... Water discharge switching device, 15
…… intake duct, 17 …… impeller, 19 …… valve,
21 ... Fire extinguishing nozzle.

Claims (1)

(57) [Claims] 1. A high-speed fire fighting boat engaged in fire fighting activities for fires on ships and water structures, comprising a water jet pump as a propulsion drive source, a casing having a water discharge opening, and a fire extinguishing water discharge integrated with the casing. A water discharge switching device having a nozzle body and a valve body for switching the jetting direction of the high pressure water output from the water jet pump between the stern direction and the direction of the fire extinguishing water discharge nozzle portion in the casing is provided on the stern side of the hull. A high-speed firefighting boat, which is provided in each of the following.