JP2587127Y2 - Shallow draft double ender ship - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a ship capable of navigating in shallow waters such as rivers and lakes, and more particularly to shallow drafts, in which propulsion devices are provided on both the bow and stern sides. The present invention relates to a so-called double-ender ship capable of sailing in the same longitudinal direction.

[0002]

2. Description of the Related Art Conventionally, a ship navigating a river or lake has often been forced to sail shallowly because of the topography, weather, and other factors. In addition, such a water area is often a narrow water area at the same time, and it is actually difficult to freely operate a large, deep-draft ship.

[0003] Japanese Patent Application Laid-Open No.
In the invention described in this publication, by raising the bow and placing only the draining rod in the water, the draft line was lowered to reduce the wave-making resistance applied to the bow, thereby enabling speedup. Japanese Patent Application Laid-Open No. 56-157892 is another prior art, and the invention described in this publication discloses a propulsion efficiency that enables high transportation efficiency in a shallow draft boat. The purpose of each is different from that of the ship in the present invention.

[0004]

[Problems to be Solved by the Invention] As described above, it is extremely difficult to operate large vessels freely in the water area where shallow draft navigation is inevitable, and there is a danger of grounding and so on. difficult. Furthermore, since the area is often in a narrow water area, it is difficult to change the traveling direction of a large vessel, so maneuvering in such an area requires much time and skill.

[0005] As described above, it is difficult for a conventional ship to navigate on rivers and lakes, and there are many restrictions on the size of the ship and the ship maneuvering technique.

Further, the prior arts described in the above-mentioned publications all require propeller propulsion and therefore require a certain depth of submersion, making it impossible to make such a shallow draft.

[0007] In view of the above problems, the present invention aims at improving the economics of marine transportation in such waters by providing a double-ender ship that can sail at shallow draft and does not need to be inverted. It is another object of the present invention to provide a ship in which the above problems are improved.

[0008]

In order to achieve the above object, a shallow draft double ender ship according to the present invention has a rigid hull having a hull shape having an opening at the bottom and a bulging portion on both sides.
It is formed so as to have a space having an airtight structure except for the bottom of the hull, and the hull can be lifted by applying air pressure to the space. substantially with the same shape, the
A water jet propulsion device having substantially the same ability is disposed on the bow and stern of the bulging portion formed on both sides so as to face each other, and a deflector that functions as a rudder by inclining the direction of the water jet is provided on the water jet propulsion device. And water jet propulsors provided at the bow and stern are bulged on both sides.
It is characterized in that it is configured to be driven via one main engine provided in each section and a clutch for fitting and disengaging the power of the main engine.

[0009]

According to the above construction, the hull shape is substantially the same as the bow and stern, and the hulls are respectively provided on the bulging portions provided on both sides.
Since the water jet propulsors having substantially the same capacity are arranged so as to face each other at the bow and stern driven by the main engine, they can have almost the same propulsion function at the bow or stern side. It will be a double-ender ship that can sail in the same direction in both stern directions.

[0010] In addition, a shallow draft, which is a concave shape having an opening at the bottom of the ship and has a hermetic structure except for the bottom of the ship, which is made to float by applying air pressure to the hull, so that it is possible to navigate in shallow waters. It becomes a double-ender ship.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual view of a shallow draft double ender ship showing one embodiment of the present invention, (a) is a plan view, (b) is a side view,
(c) is a half sectional view in front view.

In FIG. 1, reference numeral 1 denotes a hull, the bow and stern of which are formed in substantially the same hull form. And it is formed so as to have a space 2 having an airtight structure except for the ship bottom, which has a concave cross section having an opening in the ship bottom. This space 2
Then, high pressure air from an air compressor (not shown) is sent out to apply air pressure to lift the hull, thereby achieving shallow draft of the hull 1. Further, partition plates 3 are provided on the bow side and the stern side in order to prevent the waves from getting into the space 2 and the communication between the space 2 and the outside air.

Since the hull 1 does not need to consider large waves because of navigating in rivers and lakes, hovercraft and SES (surface effect)
Ship) It is not necessary to equip a soft skirt like a hull form, and the economy is improved by making the whole hull a rigid hull. Further, the hull 1 is lightened as a whole in order to achieve shallow draft.

The propulsion shaft system of the hull 1 thus constructed is
The hull 1 is formed in a concave shape and is disposed on the bulging portion 1a on both sides of the hull. This propulsion shaft system is composed of a pair of propulsors and the like on both sides, and a main engine 4 equipped with output shafts at both ends is provided at the center of the hull 1, and the main engine 4 (for example, a relatively lightweight diesel engine) The clutch 5 is disposed on both output shafts. One clutch 5 is provided for each of the two output shafts of the main engine 4, and engages and disengages in accordance with the propulsion direction of the ship, and controls the propulsion direction.

A drive shaft 6 from the clutch 5 is connected to a water jet propulsion device 7. The water jet propulsion unit 7 is comprised of a water jet propulsion unit 7 and intake port 7a for supplying water, by tilting the direction of the water jet ejected from the water jet propulsion unit 7 and the deflector 7b serve rudder. Further, the water jet propulsion device 7 can be operated at a shallower draft than a conventional propulsion device. Note that the water jet propulsion device 7 usually has a reverse device called a reverser, and generates a reverse force by directing the water jet from the water jet propulsion device 7 to the reverse direction. By using the thruster 7 properly, forward and backward can be switched, so that a reverser is not required.

The operation state of the thus constructed ship will be described below. Compressed air is previously delivered to the space 2 of the hull 1 by an air compressor (not shown), and the draft is made shallow by applying air pressure to the hull 1.

For example, when the ship is propelled to the left in FIG. 1, the right water jet propulsion unit 7 is driven by fitting the right clutch 5 of the main engine 4, and the left clutch 5 is disengaged. By doing so, the hull 1 can be propelled to the left.

When the hull 1 is to be moved sideways, FIG.
As shown in the plan view showing the state in which the shallow draft double ender ship is moved to the side as shown in FIG. 3, both the clutches 5 of the upper main engine 4 are disengaged and the clutch 5 of the lower main engine 4 is removed.
Are fitted together, the two water jet propulsors 7 located below can be operated at the same time to enable lateral movement.

As described above, according to the present invention, as in the SES hull form, a shallow draft is realized by a ship having a structure in which the hull is levitated by air pressure, and there is no protrusion on the bottom of the ship. In this embodiment, the operable water jet propulsion device 7 is arranged at the bow and stern on both sides to form a double-ender ship, so that
Since almost the same propulsion function can be provided in the stern direction, it is possible to provide a ship having good navigation performance even in a narrow water area with a shallow water depth.

It is also conceivable that the ship of the present invention saves energy by stopping the air compressor and stopping when the ship stops.

In the above embodiment, two main engines 4 and four water jet propulsors 7 are used. However, one main engine 4 and two water jet propulsors 7 are used. It is also possible, in this case, to arrange on the hull center line.

[0022]

[Effect of the Invention] According to the ship of the present invention, the hull is lifted by air pressure to achieve shallow draft, and a water jet propulsion device that can be operated at shallow draft is provided by facing the bow and stern. Since the ender ship is constructed, the water depth is shallow, and navigation in lakes and rivers in narrow water areas can be easily performed.

Moreover, the clutch at the bow and stern is provided by the clutch.
If you use water jet propulsion properly, with deflector
It functions as a rudder and can switch between forward and backward without a reverser.
it can.

As a result, the economics of shipping can be improved, and there is an effect that it can greatly contribute to the development of shipping.

Also, by making the hull shape concave, the propulsion shaft system can be arranged at the bulging portion on both sides of the hull, and the hull space can be effectively used.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a shallow draft double ender ship showing an embodiment of the present invention, (a) is a plan view, (b) is a side view,
(c) is a half sectional view in front view.

FIG. 2 is a plan view showing a state in which the shallow draft double-ender ship of the present invention is moved to the side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Hull 1a ... Swelling part 2 ... Space 3 ... Partition plate 4 ... Main engine 5 ... Clutch 6 ... Drive shaft system 7 ... Water jet propulsion device 7a ... Water intake 7b ... Deflector WL ... Water surface

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B63H 25/46 B63H 11/00-11/08

Claims (1)

(57) [Scope of request for utility model registration] The hull of a rigid hull is formed in a concave shape having an opening in the bottom of the hull and a bulging portion formed on both sides, and having a space having an airtight structure except for the bottom of the hull. The hull can be levitated by applying air pressure to the space, and the hull shape is made substantially the same as the bow and stern, and the bulge formed on both sides has almost the same capacity as the bow and stern. disposed to confront the water jet propulsion unit having provided a deflector which serves rudder by tilting the direction of the water jet in the water jet propulsion unit, ship neck, the water jet propulsion unit provided in the stern, the A shallow-draft double-ender ship characterized in that it is configured to be driven via one main engine provided in each of the bulges on both sides and a clutch for engaging and disengaging the power of the main engine.