JP3476329B2 - Hull structure of high-speed ship - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hull structure for a high-speed ship, and more particularly to a hull structure capable of preventing exhaust gas discharged from an engine from flowing backward and staying in the vicinity of the stern part of the high-speed ship. .

[0002]

2. Description of the Related Art As shown in FIGS.
At the stern of the first hull 52, exhaust pipes 53 for exhausting exhaust gas emitted from the engine to the atmosphere are provided on the left and right.

By the way, when navigating at high speed, the upper hull portion on the deck, for example, the rear space portion 55 of the passenger compartment portion 54 is in a windless state, and the exhaust gas discharged from the exhaust stack 53 flows back to this portion. Therefore, there is a problem in that the workers who work in the stern are adversely affected because they are retained.

Therefore, in order to forcibly remove the exhaust gas accumulated in the rear space 55, guides such as fins for guiding the air to the rear space 55 are provided on both sides of the hull 52, for example. A plate 56 was provided.

Further, instead of providing the guide plate, there is also a device in which a blower fan is provided on the deck of the stern to forcibly blow off the accumulated exhaust gas rearward.

[0006]

The guide plate 56 described above is used.
According to the configuration in which the natural wind is guided to the rear space portion 55 by providing the air, the air guided by the guide plate 56 inevitably gathers in the center of the hull 52 as shown by an arrow a in FIG. There is a problem that the exhaust gas flows backward because a windless portion 57 is formed.

In addition, when a blower fan is provided, special consideration must be given to the design of the hull, and the manufacturing cost is high. Therefore, an object of the present invention is to provide a hull structure for a high-speed ship that can blow out exhaust gas to the rear of the hull using natural wind without using a fan for blowing air.

[0008]

In order to solve the above-mentioned problems, the hull structure of a high-speed ship according to the present invention is a high-speed ship in which engine exhaust pipes are provided on the left and right of the stern of the hull.
An air ejection duct having a widened ejection port toward the rear is provided between both exhaust tubes of the stern of the hull, and an air intake port for taking in air is formed in the front part of the air ejection duct. It was done.

Further, another hull structure of a high-speed boat according to the present invention is a high-speed boat in which engine exhaust pipes are provided on the left and right of the stern of the hull. In addition, an air ejection duct having a wide ejection port is provided, and an air intake for taking in air to the air ejection duct via a communication passage is provided on the outer surface of the hull.

According to the above-mentioned structure of each hull structure, air is taken in by the air ejection duct during navigation and is ejected rearward from the ejection port and widely between both exhaust tubes, so that a blower fan is used. The exhaust gas can be reliably blown back to the rear.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A hull structure of a high-speed ship according to an embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

1 and 2, reference numeral 1 denotes a hull of a high-speed ship, for example, a catamaran, and an exhaust pipe 3 for exhausting exhaust gas from an engine is provided at the stern of each body 2. ing.

An air ejection duct 5 having an ejection port 5a having a wide width and a low height is provided below the central deck portion 4 which is arranged in a crotch position between the two body portions 2. An air intake port 5b is formed in the front part of the air ejection duct 5.

The width of the air ejection duct 5 is set to be, for example, the entire width between the left and right exhaust pipes 3. Needless to say, the width does not have to span the entire width between the exhaust pipes 3 (may be narrow).

According to the above-mentioned hull structure, during high speed navigation, air naturally flows into the air ejection duct 5 from the air intake port 5b and is blown out to the rear of the hull 1 from the ejection port 5a at the rear end thereof. The exhaust gas discharged from the exhaust stack 3,
It will be actively blown back.

That is, the exhaust gas discharged from the exhaust stack 3 does not flow backward to the stern side of the hull 1, and therefore, even when working on the stern side of the hull 1, the worker is not adversely affected. .

As described above, since the natural air is taken in by the air ejection duct 5 and is widely ejected rearward and between the two exhaust tubes 3, the exhaust gas is surely discharged without using a blower fan. Not only can it be blown away backward, but the exhaust stack 3 itself can also be cooled.

Further, since the air intake port 5b is provided below the central deck portion 4, the appearance is not spoiled. By the way, in the above-mentioned embodiment, the air intake port 5b of the air ejection duct 5 is provided below the central deck portion 4,
As shown by the phantom line in FIG. 2, the air intake 11 is connected to the hull 1
It may be provided on the side of the. In this case, the air intake 11 and the air ejection duct 5 are communicated with each other via the communication duct (communication passage) 12.

Also in this case, the same effect as that of the above embodiment can be obtained.

[0020]

As described above, according to the respective hull structures of the present invention, air is taken in by the air ejection duct and is widely ejected rearward and between both exhaust pipes during navigation, so that a blower fan is used. The exhaust gas can be surely blown off to the rear without doing so, and therefore work on the stern is not adversely affected. Also,
Because I tried to blow out air widely between both exhaust stacks,
The exhaust stack itself can be cooled.

[Brief description of drawings]

FIG. 1 is a side view of essential parts showing a hull structure in an embodiment of the present invention.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a side view of an essential part showing a schematic configuration of a conventional hull structure.

FIG. 4 is a plan view of relevant parts showing a schematic configuration of a conventional hull structure.

[Explanation of symbols] 1 hull 3 exhaust stack 4 Central deck section 5 Air ejection duct 5a spout 5b air intake 11 air intake 12 Communication duct

Claims (2)

(57) [Claims] 1. A high-speed ship in which engine exhaust pipes are provided on the left and right of the stern of the hull, and between the exhaust pipes of the stern of the hull, a jet port widened rearward is formed. A hull structure for a high-speed ship, characterized in that an air ejection duct is provided and an air intake for taking in air is formed in a front portion of the air ejection duct. 2. A high-speed ship in which engine exhaust pipes are provided on the left and right sides of the stern of the hull, and between the exhaust pipes of the stern of the hull, a jet port widened rearward is formed. A hull structure for a high-speed ship, characterized in that an air ejection duct is provided, and an air inlet for taking in air through the communication passage is provided on the outer surface of the hull.