JPH0930497A - Water jet propeller having side thruster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable small turning and sudden turning by providing a branch pipe in a jet path of a pump casing and disposing a change-over device for jet water in the branch pipe while connecting a jet pipe opened to left and right broadsides to the branch pipe and installing the change-over device in the connecting pipe. SOLUTION: A branch pipe 8 is connected to a jet pipe 5, and a switch valve 9 such as a three-way valve is installed in the branch pipe 9. The jet pipe 5 is closed by the valve operation of the switch valve 9 to jet jet water to the branch pipe 8. A switch valve 10 such as the three-way valve is placed in the terminal end of the branch pipe 8 and jet pipes 11a, 11b having openings respectively in the left and right broadsides of stern 6 are connected to the switch valve 10. The switch valve 9 provided in the jet pipe 5 is operated so that jet water flows into the branch pipe 8. When the switch valve 9 provided in the terminal end of the branch pipe 8 is operated to jet the jet water to the left broadside, a hull suddenly turns left. Also, when the degree of opening the switch valve 10 is adjusted and a portion of the jet water is jetted behind the stern 6, the hull turns slowly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water jet propulsion device which can easily change the advancing direction of a ship, and more particularly to a water jet which makes it possible to turn or move to a sideboard while rotating a pump at a high speed. Regarding side thrusters of propulsion devices.

[0002]

2. Description of the Related Art Conventionally, as a device that enables a boat to make a small turn or a sharp turn from straight traveling, for example, Japanese Patent Laid-Open No.
As described in the specification of JP-A-133895, page 3, right column, upper row, line 17 to page 3, left column, lower row, line 13, and FIGS. 5 and 7, a pair of pumps is provided at the stern. , A jet switching device and a connecting pipe having jet outlets on the port and starboards are provided at the outlet of this pump, the jet switching body is rotated, and the jet flow rate to the side is adjusted by the rotation angle to turn the hull. There was a propulsion steering system. In addition, JP-A-6-19
As described in the description of page 1486, page 3, left column, lines 12 to 23, and as shown in FIG. 4, the steering nozzle at the rear end of the propulsion nozzle is set to the port side or the starboard side. There was also a propulsion steering device in which the direction of the water jet was changed by turning to the left to turn the hull to the left or right.

[0003]

However, in the above-mentioned conventional apparatus of the preceding stage, a small turning or a quick turning is possible, but a pump for propulsion is required on each side of the stern, and the apparatus is required. Could be expensive. Moreover, since the connecting pipe protrudes from the stern to the surface of the water, there was a problem in safety when docking. In the conventional device at the latter stage, the hull can be turned, but a small turn cannot be performed. In addition, in the above-mentioned conventional device, parallel movement in the port side direction was impossible. It is an object of the present invention to provide a water jet propulsion device which enables a small turn or a parallel movement in a sideboard direction, facilitates berthing in a narrow waterway, and improves safety.

[0004]

The gist of the present invention is to provide a water jet in which water is pressurized by an impeller in a pump casing from a suction port opened at the bottom of a ship and jetted from a discharge port provided at the stern to obtain propulsive force. In the propulsion device, a branch pipe is provided in the jet passage of the pump casing, and a jet water switching device is arranged in the branch pipe, and the jet pipes opening to the port and starboard sides are connected to the branch pipe, and the connecting pipe is connected to the connecting pipe. A switching device is provided. The ejection pipe may be provided at the stern, or may be provided at the bow and the stern respectively. Also,
The opening degree of the switching device may be adjusted to switch between low-speed turning, low-speed side running, high-speed turning, and high-speed side running.

[0005]

The present invention is constructed as described above, and when trying to make a turn from full speed forward, the switching device provided in the ejection path is actuated to close the discharge port of the stern and pipe to the branch pipe. When the passage is opened, the jet water jetting from the discharge port of the stern flows into the branch pipe, and by operating the switching valve provided at the end of the branch pipe, the jet water jets from the starboard or port jet pipe of the stern. Therefore, a quick turn to the right or the left can be performed. In addition, if a part of the jet water jetted from the jet pipe is discharged to the discharge port of the stern, the jet water to the port side or the starboard side is reduced, and a slow turn can be performed. Particularly, if the jet pipes provided on the port side and the starboard side are provided at the bow and stern, if the jet water is jetted to the port or starboard of the bow and stern, the lateral movement at the time of berthing can be performed. Then, if jet water is jetted from the jet pipes provided on the bow and stern to the port or starboard in the opposite directions, it is possible to rotate on the spot without propelling it, and it is also possible to make sharp turns and small turns. To do.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the drawings. First, in FIG. 1, reference numeral 1 is a pump casing, reference numeral 2 is an impeller, and seawater or the like sucked from a suction port 3 of the pump casing 1 is impeller. The pressure is increased by 2 and discharged from the discharge port 4 of the pump casing 1. Reference numeral 5 is a jet pipe connected to the discharge port 4 of the pump casing 1, and jets the jet water from the discharge port 7 provided in the stern 6 to travel forward. A branch pipe 8 is connected to the ejection pipe 5, and an opening / closing valve 9 such as a three-way valve is arranged in the branch pipe 8. Then, the jet pipe 5 is closed by the valve operation of the opening / closing valve 9, and jet water is jetted to the branch pipe 8. As shown in FIG. 2, an opening / closing valve 10 such as a three-way valve is arranged at the end of the branch pipe 8, and the opening / closing valve 10 has injection pipes 11a, 11 having openings on the port and starboard sides of the stern 6.
b is connected. And the on-off valve 9 provided in the ejection pipe 5
Is operated to cause the jet water to flow into the branch pipe 8, and the on-off valve 10 provided at the end of the branch pipe 8 is operated to jet the jet water to the port side so that the hull can make a sharp turn to the left. There is. Further, if the opening / closing degree of the opening / closing valve 10 is adjusted and a part of the jet water is jetted to the rear of the stern 6, it is possible to slowly turn.

The propulsion device shown in FIGS. 3 and 4 is another embodiment of the present invention, in which a branch passage 8 has a Y-shaped conduit in the middle thereof, and opening / closing valves 10 and 12 such as three-way valves are provided at the ends thereof. It is provided. The on-off valves 10 and 12 have injection pipes 11a, 11b, and 14 opened on the stern 6 and the bow 13 on the port and starboard sides.
a and 14b are provided to stop the jet of jet water to the rear of the stern 6 and jet the jet water from the jet pipes 11a and 14b on the opposite side of the stern 6 and the bow 13 as shown in FIG. 5
As shown in, the hull can be turned on the spot, and it becomes easy to change the direction in a narrow port. And
If one of the on-off valves 10 and 12 provided at the end of the branch pipe 8 is operated and either one of the injection pipes 11a and 14b of the stern 6 or the bow 13 is closed, like the propulsion device shown in FIG.
It enables small turns and sharp turns.

By operating the open / close valves 9, 10, 12,
As shown in FIG. 4, if jet water is jetted from the port side jet pipes 11a, 14a of the stern 6 and the bow 13, the jet water can move laterally, and as shown in FIG. 6, the jet water can move in parallel with the quay. Thus, unlike the conventional apparatus shown in FIG. 7, it is not necessary to berth while making a large turn, and it does not take much time to berth, and the space for berthing is small. Then, when it becomes necessary to correct the propulsion direction due to the flow of ocean currents, in the conventional device, the hull is corrected to the original traveling direction after traveling by changing the direction of the hull as shown in FIG. However, in the present invention, as shown in FIG. 8, parallel movement in the traveling direction is possible without changing the direction of the hull during traveling.

[0009]

The present invention is configured as described above,
It enables small turns and sharp turns. That is, in the conventional device with a pair of propulsion pumps provided at the stern, it is possible to make a small turn, but the device is expensive, and the device for injecting to the sideboard is arranged at the rear of the stern and is a safety surface. However, the present invention has a side thruster device built into the hull, and the side of the hull is Since the jet flow is ejected toward one side, a small turn and a sharp turn are possible, which is an improvement in safety.

Further, in the conventional device, it was difficult to perform parallel movement in the sideboard direction, but in the other invention, the side thrusters are provided in front of and behind the hull. , It is possible to move parallel to the port side and turn on the spot without propulsion, and the direction of travel can be easily changed when working in a narrow harbor or at sea.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional plan view of essential parts of a water jet propulsion device according to the present invention.

FIG. 2 is a conceptual diagram showing an operating state of a propulsion device provided with a side thruster according to the present invention at the stern.

FIG. 3 is a conceptual diagram showing an operating state of a propulsion device in which side thrusters are provided on the stern and the bow, respectively.

FIG. 4 is a conceptual diagram showing an operating state of another embodiment of the propulsion device in which the side thrusters are provided on the stern and the bow.

FIG. 5 is a conceptual diagram showing a situation in which the propulsion device according to the present invention is turned on the spot.

FIG. 6 is a conceptual diagram showing a situation in which the propulsion device according to the present invention is moved in parallel with the quay and is brought into contact with the shore.

FIG. 7 is a conceptual diagram showing a method for correcting the advance of a ship using a conventional propulsion device.

FIG. 8 is a conceptual diagram showing a method for correcting the advancement of a ship using the propulsion device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pump casing 2 Impeller 3 Suction port 4 Discharge port 5 Ejection pipe 6 Stern 8 Branch pipe 9, 10, 12 On-off valve 11a, 11b Injection pipe 14a, 14b Injection pipe

Claims (4)

[Claims] 1. A water jet propulsion device in which water is pressurized by an impeller 2 in a pump casing 1 from a suction port 3 opened at the bottom of the ship and jetted from a discharge port 4 provided at a stern 6 to obtain propulsion force. A branch pipe 8 is provided in the jet conduit 5 of the pump casing 1, a jet water switching device 9 is provided at a branch point with the jet pipe 5, and switching valves 10 and 12 are provided at the end of the branch pipe 8. , The injection pipes 11a, 11b, 14 that open to the port and starboard at the ends of the branch pipes 8, 8.
A water jet propulsion device having a side thruster characterized by connecting a and 14b. 2. A water jet propulsion apparatus having a side thruster, characterized in that the injection pipes 11a, 11b according to claim 1 are provided at the stern. 3. The injection pipes 11a, 11b according to claim 1,
A water jet propulsion device having a side thruster characterized in that 14a and 14b are provided on the bow and stern. 4. A water jet propulsion apparatus having a side thruster, characterized in that the switching device according to claim 1 is a switching valve 9, 10, 12 whose opening can be adjusted.