JP2000289694A - Propeller observation hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To visually judge the damage or pollution level of a propeller and to facilitate a maintenance plan by arranging a pipe of a proper size above the propeller of a hull to above a draft line, providing a flange at the upper end of the pipe, covering it with a reinforced glass, and bleeding the inside air with a bleeding device. SOLUTION: An observation pipe is normally filled with air to prevent a water hammer by waves, the sticking of marine organisms and the intrusion of refuse such as floating objects into the observation pipe. Bubbles around a propeller 3 tend to stagnate in the pipe during navigation, a reinforced glass is not directly applied with the water hammer by waves. When the air in the pipe is bled by a bleeding device, the sea surface rises to the reinforced glass of an observation hole 1, and the surrounding of the propeller 3 can be visually observed. When there is some fear for the occurrence of torque rich of the propeller 3 or the entanglement of a net or a rope during navigation, the propeller 3 and its surrounding can be directly confirmed easily without relying on the dangerous work such as diving.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION In the present invention, damage to a propeller, a degree of dirt, and the like, and entrapment of a net or a rope can be confirmed by visually observing a propeller and a periphery of a propeller shaft of a ship. By doing so, problems caused by the propellers are discovered early, and maintenance plans, navigation safety, and economical driving are supported.

[0002]

2. Description of the Related Art Conventionally, small boats and the like have a viewing lid from above a deck. However, detailed observations were difficult due to sea surface reflection and sea conditions.

[0003]

SUMMARY OF THE INVENTION The present invention sucks seawater of a waterline into a pipe by bleeding air in the pipe, which is difficult to see, in the vicinity of the propeller, so that the water can be drawn as close as box glasses on the water surface. Observation was made possible. In the propulsion unit, torque rich caused by the propeller, or abnormal vibration of the hull, etc. can also be observed
The cause can be narrowed down. Further, the visual inspection enables the user to judge the degree of damage and dirt on the propeller, thereby facilitating the maintenance plan.

[0004]

Means for Solving the Problems (1) A pipe of an appropriate size is piped above the propeller of the hull up to the waterline, the upper end of the pipe is provided with a flange, and the pipe is covered with tempered glass. (2) A pipe is provided inside the pipe by an air extraction device so that air inside the pipe is extracted. (3) In order to prevent water hammer due to waves, prevent marine organisms from adhering, and discharge dust such as suspended matter out of the pipe, air pipes can be connected to the pipes of the bleeding device, and valves can be attached to each pipe for switching. To do. The apparatus is constructed as described above.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (1) Water is usually filled with air to prevent water hammer due to waves, to prevent marine organisms from adhering, and to prevent dust such as suspended matter from entering a viewing pipe. During the voyage, air bubbles tend to stay in the pipe from around the propeller, so the tempered glass does not receive water hammer directly due to the waves. (2) Open the valve connected to the bleeding device when looking around the propeller To gradually remove air from the tube. (3) The sea surface rises to the tempered glass of the viewing window, and the propeller periphery can be visually observed. (4) Each wing can be inspected by turning the propeller wing.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (1) During a voyage, when a propeller generates torque rich, or when there is a concern that a net or rope may be involved, the propeller and the surrounding area of the propeller can be easily moved without danger of diving or other dangerous work. You can check directly. (2) If the bleeding device of the present device is used, in the case of a peep glass of a seabed pleasure boat, etc., a clean state can always be maintained, and dust such as floating substances can be immediately eliminated. (3) The present device can be equipped with a simple device not only in a ship but also in a place that requires visual observation below the water surface, and is used for various purposes.

[0007]

(1) By providing the propeller viewing window, when torque-rich vibration or the like caused by the propeller is generated, the condition thereof can be easily checked, and it is economical without cost. (2) Visual inspection becomes possible, and the degree of damage and dirt on the propeller can be determined, so that the maintenance plan becomes easy. (3) In a large ship, the propeller inspection is a diving method, but the present invention makes it possible to easily inspect the propeller. (4) Existing ships can be equipped with simple devices regardless of whether they are large ships or small ships, and the above advantages can be utilized.

[Brief description of the drawings]

FIG. 1 is a side view of the present invention.

[Explanation of symbols]

 1 is a propeller viewing window 2 is a bleed tube 3 is a propeller

Claims (1)

[Claims] (1) A pipe of an appropriate size is piped above the propeller of the hull up to the waterline, and an upper end of the pipe is provided with a flange and covered with tempered glass. (2) A pipe is provided inside the pipe by an air extraction device so that air inside the pipe is extracted. The propeller viewing window configured as above.