JPH11291983A - Rubbish crushing device for water-jet outboard motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such a device that a water-jet propelled ship equipped with a water-jet apparatus as an outboard motor, can cut, crush and discharge the rubbish sucked into a suction casing. SOLUTION: A water-jet propelled ship is equipped with a water-jet apparatus as an outboard motor, in which a baffle plate 5 to partition the cavity of a pump casing into a front and a rear compartment is installed on the suction side of a pump installed vertically inside the pump casing, wherein the baffle plate edge 5a on the outgoing side of water stream is positioned near the suction side edge 4a of the pump impeller 4, and a cutter blade is installed at the baffle plate edge on the outgoing side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water jet outboard propulsion device in which a water jet device is formed separately from a ship and is detachably mounted on the ship as an outboard propulsion device. The present invention relates to a device for crushing waste.

[0002]

2. Description of the Related Art Conventionally, it is well known that propulsion of a ship using a water jet device includes providing a jet device inside the ship or making the jet device detachable from the ship as an outboard motor. Japanese Utility Model Laid-Open No. 6-18196 discloses an example in which the water jet apparatus is provided on an outboard motor, and FIG. 3 of JP-A-2-99095 and JP-A-4-133894 shows an example in which a water jet device is used as an outboard motor. is there.

[0003]

A problem with the water jet propulsion device is that the pump is blocked by floating substances when the inboard motor and the outboard motor are traveling on the water surface with much floating substances. For this reason, a screen is provided at the suction port of the jet water to prevent dust from being sucked into the water intake duct.However, this screen cannot prevent fine string-shaped dust from entering, The wings are entangled and closed. The garbage that has entered the water absorption duct is in a state where it can only be removed by stopping the boat and manually.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its gist is to provide a water jet propulsion boat having a water jet device as an outboard motor. A pump impeller is attached to the lower part of the drive shaft which is suspended inside the air conditioner, and a plate-shaped flow straightening plate is provided in a bore of the suction casing below the impeller to divide the bore of the suction casing into front and rear. The water flow outlet side edge of the plate is brought close to the suction side edge of the blade of the impeller, and a cutting edge is formed at the water flow outlet side edge of the straightening plate.

[0005] The straightening plate for dividing the bore of the suction casing back and forth includes the axis of the bore of the suction casing, and its lower end extends to the suction opening of the suction casing.

On the outlet side of the flow straightening plate, a rotating force is applied to the water flow rectified by the rotation of the blades of the pump. Therefore, if the cutting blade is formed in a saw blade shape, dust contained in the water flow is reduced. Are caught and held, and can be efficiently cut by the blades.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The device according to the present invention is constructed as described above, and the water flow sucked into the suction casing is divided back and forth by a flow straightening plate, sucked by a pump and jetted from a nozzle as a jet. The hull can be propelled by the reaction force.

At this time, the dust contained in the suction water flow is
At the outlet of the current plate, rotational force is applied by the blades of the pump, and the blades of the current plate are caught by the rotating blades, and are sucked by the pump and discharged together with the jet.

In other words, according to the present invention, the rotating blades serve as operating blades, and the current plate serves as fixed receiving blades to cut off dust. Even string-like dust is cut and crushed to close the pump. There is no thing. In addition, since the suction casing is divided into the front and the rear by the rectifying plate, the concentration of the suction water flow on the rear wall of the suction casing is reduced, and the impeller can uniformly and smoothly suck the water flow.
Hereinafter, the present invention will be specifically described with reference to the drawings.

[0010]

1 is a schematic side view of a water jet propulsion boat embodying the present invention. FIG. 1 shows a main body of the water jet propulsion boat, and B shows a water jet outboard motor mounted on the stern. .

Next, the configuration of the water jet outboard motor B will be described with reference to FIG. In FIG.
Reference numeral 1 denotes a driving device of a jet generating pump, 2 denotes a driving shaft hanging down from the driving device 1, 3 denotes an impeller mounted on a lower end portion of the driving shaft 2, and 4 denotes its blade. Reference numeral 5 denotes a rectifying plate for partitioning the inner cavity 6a of the suction casing 6 in the front and rear direction. The rectifying plate is formed in a plate shape including the axis of the inner cavity of the suction casing 6, and the lower edge thereof is connected to the suction port 6b. It has been extended to.

As shown in FIGS. 4 and 5, the outlet edge of the water flow of the current plate 5 is brought close to the inlet edge 4a of the water flow of the blade 4 of the impeller 3, and the outlet edge thereof. A cutting edge is formed at 5a. In the illustrated example, this cutting blade is formed in a saw blade shape, and its blade body is inclined toward the blade 4 approaching with the rotation of the pump. That is, for example, the blade 4 of the right-rotating pump approaches the cutting blade from above when rotating the right half, and approaches from below when rotating the left half. And the left half of the blade body are inclined in the opposite direction. (See Fig. 5)

In FIG. 2, reference numeral 7 denotes a screen provided at the suction port 6b, 8 denotes a suction scoop, 9 denotes a cover for shielding a lower end of a clearance between the propulsion boat A and the outboard motor B, and 10 denotes a water. A jet injection nozzle, 11 is a reverser, and 12 is a reverse nozzle.

The device according to the present invention is constructed as described above, and the water flow sucked into the suction casing 6 is
The suction casing 6
2 can be prevented from being split and the drift in the suction casing 6 can be prevented.

The water flow passing through the straightening plate 5 is
The air is smoothly sucked into the pump by the blades 4, pressurized, and jetted from the jet nozzle 10 as a jet. At this time, the dust contained in the suction water flow is sucked into the pump along the current plate 5;
Since the outlet side edge 5a of the blade 4 and the inlet side edge 4a of the blade 4 are close to each other, the blade is cut by the rotating blade 4 at the outlet of the rectifying plate 5, and is entangled with the blade 4 or wrapped around the hub of the impeller 3. It is discharged with the jet without any interruption.

That is, according to the present invention, the straightening plate 5 serves as a fixed blade, and the rotating blades 4 serve as operating blades to constitute a cutting device in the suction casing 6. The operation of the cutting device is carried out along the hull 1. It is done automatically by running.

As shown in FIG. 5, when the cutting blade provided on the current plate 5 is formed into a saw blade shape as shown in FIG. It is possible to further enhance the cutting effect.

Further, by inclining the cutting blade provided on the current plate 5 toward the rotation direction of the blade 4, dust is caught on the cutting blade portion, and the blade 4 can cut and crush more efficiently.

[0019]

As described above, the device according to the present invention is capable of automatically cutting and removing dust in the suction casing which could not be removed unless the ship was stopped, while traveling.
Naturally, the operation efficiency of the pump is improved by rectifying the suction water flow, and the conventional problem can be completely solved.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a water jet propulsion ship according to the present invention.

FIG. 2 is a side view of the water jet propulsion unit shown in FIG. 1 with a part thereof cut away.

FIG. 3 is a rear view of FIG. 2;

FIG. 4 is a vertical sectional side view of a suction portion of the jet water.

FIG. 5 is a schematic plan view similarly cut along the line XX of FIG. 4;

FIG. 6 is a vertical side view of a jet water suction portion of a conventional machine.

[Explanation of symbols]

 2 Drive shaft 3 Impeller 4 Blade 4a Suction side edge 5 Rectifier plate 5a Exit side edge 6 Suction casing 6a Lumen 6b Suction port

Claims (3)

[Claims] In a water jet propulsion boat using a water jet device as an outboard motor, a pump impeller 3 is attached to a lower portion of a drive shaft 2 suspended in a pump casing, and a suction casing below the impeller 3 is provided. 6
Is provided with a plate-shaped rectifying plate 5 for dividing the inner cavity 6a of the suction casing 6 back and forth, and the outlet side edge 5a of the rectifying plate 5 for the water flow is sucked into the blade 4 of the impeller 3. Side edge 4
a crushing device for dust in a water jet outboard motor, wherein a cutting edge is formed at the outlet edge 5a of the current plate 5 on the outlet side of the water flow. 2. The dust crushing apparatus for a water jet outboard motor according to claim 1, wherein the cutting blade provided on the water flow outlet side of the current plate 5 is formed in a saw blade shape. 3. An apparatus for crushing dust in a water jet outboard motor according to claim 1, wherein said straightening plate 5 extends to a suction port 6b of a suction casing 6.