JP6804109B2 - Work boat pontoon - Google Patents

Description

The present invention relates to a pontoon of a work vessel, which is provided with a tunnel penetrating from the rear end of the hull to the bow material.

Conventionally, some work boat pontoons have or do not have self-propelled capability, and some have a tunnel that penetrates from the rear end of the hull of the pontoon to the bow material.

As the pontoon of such a work vessel, for example, the technique disclosed in Patent Document 1 or Patent Document 2 is used.

Japanese Unexamined Patent Publication No. 2016-185800 Japanese Unexamined Patent Publication No. 2016-185801

In the conventional technique, Patent Document 1 states that the front end of a tunnel penetrating from the rear end of the hull constituting the pontoon to the bow material is below the waterline, and air bubbles are introduced into the flat bottom material of the pontoon. A plurality of bubble promoters for generating and accumulating to form an air layer between the water and the ship bottom material are connected in the width direction of the hull, and the ship bottom material is covered over the entire hull. A technique provided so as to project downward is disclosed.

In Patent Document 2, the front end of the tunnel penetrating from the rear end of the hull of the pontoon to the bow material is below the waterline, and the tunnel is provided so as to have a straight cross-sectional shape with a flat upper edge. The technology is disclosed.

However, in the above-mentioned conventional technique, an air layer is formed between the water and the bottom material of the ship, but since the front end of the part where air should be taken in is in the water below the waterline, sufficient air is taken in. There was a problem that it could not be done.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a hull of a work ship capable of efficiently forming an air layer between water and a ship bottom material.

The present invention is a pontoon of a work vessel configured to operate by installing a push vessel at the rear end of a non-self-propelled hull that is operated by another force without having a propulsion device, and is behind the hull. A tunnel that penetrates the bottom of the ship from the end to the nose material is provided, the front end of the tunnel is opened above the waterline, and the bottom of the tunnel, that is, the tunnel ceiling, is formed in a tapered shape that widens at the front end in the bottom material area. From its base, it extends parallel to the rear at the left and right edges, the position of the hull at the bottom of the tunnel rises at a steep angle, and the ceiling that becomes the bottom of the tunnel behind the raised hull is at a steeper angle than the bottom. An inclined surface that rises entirely from the rear end of the rising bow to the rear of the bottom is formed , and the inclined surface at the bottom of the tunnel that rises to the end of the tunnel is configured to be located in the water below the waterline during operation. It is characterized by that.

In the present invention, a tunnel that penetrates the bottom of the ship from the rear end of the hull to the bow material is provided, and the front end of the tunnel is opened above the waterline , so that air can be effectively aired from the opening due to wind pressure during navigation. Is sucked in and then flows in together with the water flow to form bubbles at the bottom of the tunnel, which has the effect of reducing navigation resistance.

Further, in the present invention, the bottom of the tunnel, that is, the ceiling of the tunnel is formed in a tapered shape that widens at the front end in the bottom material area, and extends from the base in parallel to the rear at the left and right edge edges, and the bow of the bottom of the tunnel. The position is raised at a steep angle, and the ceiling, which is the bottom of the tunnel behind the raised bow, forms an inclined surface that rises from the rear end of the bow, which rises at a steep angle from the bottom, to the rear of the bottom . Due to the tapered shape of the bottom material area, air effectively flows in from the opening at the front end of the tunnel, air bubbles smoothly flow to the bottom of the ship from the front that rises at a linear angle from the bottom, and the slope rises toward the rear. Bubbles are accelerated on the surface, which has the effect of reducing navigation resistance.

The present invention is a pontoon of a work vessel configured to operate by installing a pusher at the rear end of a non-self-propelled hull that is operated by another force without having a propulsion device, and is behind the hull. By providing a tunnel that penetrates the bottom of the ship from the end to the bow material and opening the front end of the tunnel above the waterline, the air that flows in with the water flow becomes bubbles, reducing the navigation resistance and further pushing the ship. It has the effect of improving propulsion efficiency.

Furthermore, the bottom of the tunnel, that is, the ceiling of the tunnel, is formed in a tapered shape that spreads toward the front end in the bottom material area, and extends parallel to the rear at the left and right edge edges from the base, and the bow position of the bottom of the tunnel is The ceiling, which is the bottom of the tunnel after the bow is raised at a steep angle, forms an inclined surface that rises from the rear end of the bow, which rises at a steep angle from the bottom, to the rear of the bottom . Air effectively flows in from the front end of the tapered tunnel, and the bubbles flowing in from the front end of the tunnel are accelerated by the inclined surface rising toward the rear of the tunnel, causing the effect of reducing the navigation resistance as much as possible. It has the effect of saving money and increasing the speed of the ship.

It is a bottom view which shows the structural example of the pontoon which concerns on one Embodiment of this invention. FIG. 2 is a sectional view taken along line II-II in FIG. FIG. 3 is a cross-sectional view taken along the line III-III in FIG.

Next, a mode for carrying out the present invention (hereinafter, referred to as an embodiment) will be described with reference to the drawings. In the drawings below, the same or similar parts are designated by the same or similar reference numerals. However, the drawings are schematic, and the ratio of dimensions of each part does not always match the actual ones. In addition, it goes without saying that the drawings include parts having different dimensional relationships and ratios from each other.

As shown in FIG. 2 which is a cross-sectional view taken along line II-II of FIGS. 1 and 1, the present embodiment is a non-self-propelled pontoon 10 which does not have a propulsion device and is operated by another force. It goes without saying that the pontoon includes a self-propelled pontoon that has a propulsion device and can be operated by itself, and the present invention can also be applied to a self-propelled pontoon. The non-self-propelled pontoon 10 is operated by installing push vessels T1 and T2 at the rear end. There is also a method of using one push ship.

The pontoon 10 of the work vessel is provided with tunnels 30 and 30 penetrating from the rear end portion 21 of the hull 20 to the bow member 22. The front end 31 of the tunnels 30 and 30 is open above the waterline WL, and the bottom 32 of the tunnels 30 and 30 is an inclined surface 33 that rises rearward.

As shown in FIG. 3 which is a cross-sectional view taken along the line III-III of FIGS. 2 and 1, the pontoon 10 is provided with a deck 23 at the upper part, and ship side members 24 and 24 are provided on both sides connected to the deck 23. There is. The front region of the deck 23 is formed in a substantially arcuate plane shape, the front end portion thereof is provided with a bow member 22, and the rear end portion 21 of the deck 23 has a linear plane shape in the width direction as shown in FIG. A stern member 25 is provided. As shown in FIG. 2, the bottom 26 of the hull 20 of the pontoon 10 changes from front to back, and the bottom material 26c is formed forward and downward from the stern material 25 to the front region of about 30% of the hull 20, and the bottom material 26c. A ship bottom material 26b formed substantially horizontally is formed from the front end portion of the hull 20 to approximately 30% of the front region of the hull 20, and the ship bottom material 26a is formed in a forward ascending curve from the front end portion of the ship bottom material 26b to the front end portion of the hull 20. The tip 26d, which is the front end of the hull 20, rises vertically.

The bow material 22, deck 23, ship side materials 24, 24, ship bottom materials 26a, 26b, 26c, tip 26d, and stern material 25 are watertightly connected. Further, notch-shaped pusher recesses 27 and 27 for fitting the pusher T1 and T2 on the port side parallel to the center line of the hull 20 are provided on the deck 23 and the stern material 25 at the stern, as shown in FIG. In addition, the lower ends of the pushboat recesses 27 and 27 are open. Further, the pusher T1 has a screw S that generates a propulsive force by rotating. The screw S is provided in the lower rear part of the pusher T2.

As shown in FIGS. 1 to 3, groove-shaped tunnels 30 and 30 are provided which penetrate from the front part of the pusher recesses 27 and 27 to the bow member 22 region and open downward along the bottom members 26a, 26b and 26c. Has been done. The ceilings of the tunnels 30 and 30 face the ship bottom members 26a, 26b and 26c and change in height direction, and are formed in a front-spreading shape in the front ship bottom member 26a region. The tunnels 30 and 30 are provided symmetrically, the front end 31 thereof opens above the waterline WL, the bow 34 along the bottom member 26a rises at a steep angle from the bottom, and the front end 31 is the waterline WL. The tip 28 of the hull 20 of the pontoon 10 in the traveling direction is formed into a tapered shape 29 that opens in the air above and widens toward the tip, and the base 29a of the tapered shape 29 is located behind the taper shape 29.

In the non-self-propelled type pontoon 10, two push vessels T1 and T2 are fitted and installed in the push vessel recesses 27 and 27 of the pontoon 10, respectively, and in the push vessels T1 and T2, the screw S is rotationally driven by power. The pontoon 10 is driven forward by the propulsive force. The waterline WL shown in FIG. 2 represents the one during operation. Although resistance is generated in the pontoon 10 during operation, the resistance of the pontoon 10 is reduced by the action of the tunnels 30 and 30, and the propulsion efficiency of the push vessels T1 and T2 is further improved. The output of the pushers T1 and T2 is reduced as compared with the case of not having 30, and the pontoon 10 is operated.

Here, the efficiency is further improved by devising the tunnels 30 and 30. That is, when the pontoon 10 advances at a speed, the water flow and air hit the hull 20 relative to this forward operation, and the front end 31 of the tunnels 30 and 30 opens above the waterline WL, and the hull of the pontoon 10 The tip 28 in the traveling direction of 20 is formed in a tapered shape 29 that widens toward the tip, and the base 29a of the tapered shape 29 is located behind the tapered shape 29, so that air is introduced to the front ends of the tunnels 30 and 30. Effectively flows in through the opening of 31.

Since the bottom 32 of the tunnels 30 and 30 is an inclined surface 33 that rises rearward, air effectively flows in from the opening of the front end 31 during navigation, and air bubbles are formed on the bottom 26 of the tunnels 30 and 30. When the air bubbles flow from the front part to the rear part of the tunnels 30 and 30, they are accelerated by the inclined surface 33 rising toward the rear side, which has an effect of reducing the navigation resistance.

As described above, since the front end 31 of the tunnels 30 and 30 penetrating from the rear end 21 of the hull 20 to the bow material 22 is opened above the waterline WL, it is more effective than the opening due to wind pressure during navigation. It sucks in air and is introduced into the bottom 32 of the tunnels 30 and 30 to form bubbles, which has the excellent effect of reducing cruising resistance, saving fuel and increasing the speed of the ship.

Further, the front end 31 of the tunnels 30 and 30 penetrating from the rear end 21 of the hull 20 to the bow material 22 is opened above the waterline WL, and the inclined surface of the tunnel 30 and 30 rising rearward. Since it is set to 33, when air effectively flows in from the opening of the front end 31 during cruising, bubbles are formed on the bottom 26 of the tunnels 30 and 30, and the bubbles flow from the front to the rear of the tunnels 30 and 30. , Accelerated by the inclined surface 33 rising toward the rear, and the accelerated water flow is sent to the screw S. As a result, the navigation resistance can be reduced, the power can be reduced, or the speed can be increased, which has an excellent effect of contributing to energy saving and speeding up.

Further, the front end portions 31 of the tunnels 30 and 30 are opened above the waterline WL, and the tip portion 28 of the hull 20 of the pontoon 10 in the traveling direction is formed into a tapered shape 29 that widens toward the tip. Combined with the base 29a located behind it, air effectively flows in through the openings in the front ends 31 of the tunnels 30, 30. As a result, less power is required or the speed can be increased, which has an excellent effect of contributing to energy saving and speeding up.

As shown in FIGS. 1 and 2, the push boats T1 and T2 are positioned so as to fit into the push boat recesses 27 formed in the rear end portion of the hull 20. The pushboat recess 27 is bored so as to penetrate from the deck 23 to the bottom 26, and the pushboats T1 and T2 are fitted in a floating state in the pushboat recess 27. The push boats T1 and T2 have an arc-shaped tip, and the hull 20 side linearly contacts the non-push portion 27a formed in the push boat recess 27 in an arc shape over the entire width, and the push boat T1 , Both sides of T2 are sandwiched between the side walls 27b and 27b of the pusher recess 27.

As a result, the push ships T1 and T2 can generate forward thrust without swinging sideways while being sandwiched between the side walls 27b and 27b of the push ship recess 27. Then, the tip portions of the push boats T1 and T2 abut linearly over the entire width on the non-push portion 27a formed in an arc shape, and the thrust can be transmitted to the hull 20 without difficulty without the thrust being concentrated in a point shape. it can. Further, the direction of the hull 20 can be changed by making the thrusts of the push ships T1 and T2 different.

In the present embodiment, those having two tunnels 30 and 30 are shown, but it goes without saying that one tunnel may be used.

Finally, the description of each embodiment described above is an example of the present invention, and the present invention is not limited to the above-described embodiment. Therefore, it goes without saying that various changes can be made according to the design and the like as long as the technical idea of the present invention is not deviated from the above-described embodiments.

10 Hull 20 Hull 21 Rear end 22 Bow neck material 23 Deck 24 Ship side material 25 Stern material 26 Ship bottom 27 Pushing ship recess 28 Tip part 29 Tapered shape 29a Base 30 Tunnel 31 Front end 32 Ship bottom 33 Inclined surface 34 Stern Deck S screw WL water line

Claims (1)

It is a pontoon of a work vessel that is configured to operate by installing a pusher at the rear end of a non-self-propelled hull that is operated by other power without having a propulsion device.
A tunnel that penetrates the bottom of the hull from the rear end of the hull to the bow material is provided.
The front end of the tunnel should be opened above the waterline and
The bottom of the tunnel, that is, the ceiling of the tunnel, is formed in a tapered shape that widens at the front end in the bottom material area, extends parallel to the rear at the left and right edge edges from the base, and the bow position of the bottom of the tunnel is steep. A tunnel that rises to the rear of the bow, and the ceiling, which is the bottom of the ship, forms an inclined surface that rises from the rear end of the bow to the rear of the bottom at a steep angle from the bottom, and also rises to the end of the tunnel. The sloping surface at the bottom of the vessel is a pontoon of a work vessel configured to be located in the water below the waterline during operation.

Images