CN102490860A

CN102490860A - Double-tail-fin self-discharging cement ship

Info

Publication number: CN102490860A
Application number: CN2011104336200A
Authority: CN
Inventors: 孙家鹏; 曹山林
Original assignee: Shanghai Merchant Ship Design and Research Institute
Current assignee: Shanghai Merchant Ship Design and Research Institute
Priority date: 2011-12-21
Filing date: 2011-12-21
Publication date: 2012-06-13
Anticipated expiration: 2031-12-21
Also published as: CN102490860B

Abstract

The invention relates to a structure of a cargo ship, in particular to a double-tail-fin self-discharging cement ship, which is used for transporting bulk cement and has a ship structure and a ship tail shape. A rear body of the cement ship is symmetrical right and left; tail fins are formed by a tail fin outer knuckle line and a tail fin inner knuckle line and have a forward water drop shape; an outer plate of which the tail is not provided with the tail fins is formed by connecting an inclined flat plate which is arranged upwards from the bottom of the ship with an arc-shaped plate arranged upwards through a tail knuckle line; all numerical values of the shape of the rear body comprising the tail fins, which are described in an offset table, are in a range of +/-5 percent; and the moulded depth of the cement ship is 11m, and the half width is 11.25m, or the deadweight capacity of the cement ship is 15,000t. By the ship, the resistance can be reduced by 5 percent while propulsive efficiency is not reduced. Simultaneously, due to the design of separated forward water drop type tail fins, the ship is convenient to process and manufacture; and in a propulsion mode of double paddles and double rudders, the ship has low draught depth, is flexibly operated, can conveniently sail in most of rivers in China, saves operating cost, contributes to promotion of development of capital construction and increases the pace of economic construction.

Description

A kind of double tail fins self-unloading concrete ship

Technical field

The present invention relates to the structure of shipping boats and ships, particularly relate to a kind of ship structure and the hull tail shape of shipping bulk cement.

Background technology

Cement all needs a large amount of the use as the important foundation material of nation-building in fields such as each item economic construction, national defence industry, people's livelihood capital constructions.The transportation of a large amount of cement now almost will rely on the sea-freight that cost is low, freight volume is big entirely and accomplish.

Being widely used in the art integrates the self-unloading concrete ship of mechanical type and pneumatic type, and this boats and ships have characteristics such as safety and environmental protection, high efficiency, high automation.

But also there is deficiency in prior art, mainly is that the self-unloading concrete ship road-holding property of single oar and single rudder structure is relatively poor, generally is suitable for navigation transportation in great river, ocean.Yet the place of production of cement in China, manufacturer distribute very inhomogeneous; Particularly a lot of manufacturers establish interiorly; Because the single oar and single rudder boats and ships of equal tonnage is handling relatively poor relatively, can not navigate by water or handle flexibly and caused traffic cost to improve greatly in the inland river, influenced the speed of whole capital construction.How to consider to improve economy from the integral body operation cycle is the urgent problem of a pendulum in face of vast ship design worker.

Summary of the invention

The objective of the invention is to provide a kind of structure that can change present self-unloading concrete ship, thereby the road-holding property that improves boats and ships can get into the purpose that more river course reaches reduction transport of cement cost.Thereby the structure that adopts simultaneously can shorten production cycle and reduce laid down cost.

The object of the invention is realized by following technical scheme.

A kind of double tail fins self-unloading concrete ship is characterized in that:

Body left-right symmetric behind the said concrete ship;

Two tail fins are made up of knuckle line in outer knuckle line of tail fin and the tail fin wherein, and are positive droplet-shaped;

Afterbody does not comprise that the outside plate of tail fin is connected and composed through tail knuckle line and the arc that makes progress then by the oblique flat board that makes progress from hull bottom;

Build value such as following table behind the said self-unloading concrete ship:

All values is all in ± 5% scope.

Further, the moldeed depth of said concrete ship is 11 meters, and half-breadth is 11.25 meters.

Further, said concrete ship is 15000 deadweight cargo tonnagies.

Environmental protection and high efficiency, high automation are the principal features of self-unloading concrete ship of new generation.Yet to improve economy but be the problem that design side is ignored easily through improving road-holding property.Before this, this area still no-trump double tail fins is used for the instance on the self-unloading concrete ship, and being used on the other types ship tail fin also has deficiencies such as resistance is big, constructional difficulties.

According to technical scheme provided by the invention, the positive droplet-shaped tail fin of separation type that promptly is complementary with two-shipper, two oar, Twin Rudders propulsion mode is the self-unloading concrete ship that an at present unique in the world type adopts the double tail fins molded lines.

By the present technique scheme, this tail fin alone becomes one, does not comprise that promptly the afterbody lines of tail fin is complete, has solved the difficult problem of constructional difficulties and engine room arrangement;

The shape size of the positive droplet-shaped tail fin of separation type of the present invention has taken into full account the position of main frame and shaft generator, and compact conformation is reasonable.Two-shipper, two oar, Twin Rudders propulsion mode not only can navigate by water in Unlimited Navigation Areas boats and ships, but also can get into and handle flexibly the various inland waters shallow in the waters, that the navigation channel is narrow, have saved traffic cost greatly.

Beneficial effect of the present invention: the tail fin line style is when having taken all factors into consideration engine room arrangement; Through the CFD instrument; Studied tail fin different shape parameter such as size, position, shape, turn round to the influence to resistance and propelling such as, distance between shafts, screw propeller hand of rotation, various schemes are compared.Final molded lines can reduce resistance 5% through model experiment and real ship trial voyage or flight result proof.Simultaneously, the tail fin of separation type of the present invention is convenient to processing and manufacturing; The propelling form of two oar Twin Rudders, shallow draft, manoeuvrable can navigate by water in the most domestic rivers easily, have saved operating cost, and the economic construction paces are accelerated in the development of favourable promotion capital construction.

Description of drawings

Fig. 1 is one of embodiment of double tail fins self-unloading concrete ship of the present invention, is body body plan behind the self-unloading concrete ship;

Fig. 2 is the lateral plan of Fig. 1 self-unloading concrete ship;

Fig. 3 is the birds-eye view of Fig. 1 self-unloading concrete ship;

Fig. 4 is a body body plan behind the existing conventional shape double tail fins ship.

Knuckle line, flat line in stern transom plate, tail knuckle line, the outer knuckle line of tail fin, the tail fin have been shown among the figure.

The practical implementation method

Specify structure of the present invention below in conjunction with accompanying drawing.

The objective of the invention is in order to improve the economy of self-unloading concrete ship of new generation, proposed design concept, thereby audaciously the double tail fins line style has been used for the self-unloading concrete ship through shallow draft, superpower road-holding property.Simultaneously tail fin is optimized, reached the purpose that reduces resistance, raising propulsion coefficient, and solved the difficult problem of constructional difficulties and engine room arrangement.

Double tail fins is with respect to the r Zweier of routine, and back body is equivalent to " decomposition " and becomes three thinner parts, thereby maximum profile position can move later on, increased entrance of vessel, helps improving the wave making situation of bow; In addition, from advancing viewpoint, because screw propeller is placed after two urosomes, residing viscosity wake is bigger, and can be supplied water fully again, thereby can obtain higher propulsion coefficient.

Fig. 4 is traditional outer Eight characters tail fin, and as can be seen from the figure, tail fin is bigger, extends in the ship basically.Because the inner space of tail fin can not make full use of, therefore outer splayed configuration tail fin can only be arranged main frame and shaft generator through strengthening tail fin.In addition, tail fin and after plating merge one (afterbody lines that does not promptly comprise tail fin is not complete), have therefore strengthened the difficulty of construction, have prolonged construction period.

The positive droplet-shaped tail fin of the separation type of Fig. 1 of the present invention is less relatively, and shape " just " is easy to main frame and shaft generator and arranges, simultaneously because tail fin is a separation type and shorter, therefore is easy to construction and has shortened production cycle greatly.

It is 11 meters that present embodiment has adopted the concrete ship moldeed depth, and half-breadth is 11.25 meters, 15000 deadweight cargo tonnagies.The wheelbase of tail fin of the present invention correspondingly widens, and has strengthened the wake behind the urosome, has reduced the viscosity wake, thereby has improved propulsion coefficient.Through reducing tail fin and it being arranged along vertical flow path direction, reduced resistance effectively.Final molded lines can reduce resistance 5% through model experiment and real ship trial voyage or flight result proof.

The contriver has adopted technical scheme of the present invention at 15000 tons of self-unloading concrete ships of new generation.Warp with the contrast of the self-unloading concrete ship of tonnage, road-holding property improves greatly, can navigate by water smoothly in most of at home inland rivers, thereby has improved economy.And,, caused the decline of economy owing to can not in rivers, navigate by water perhaps increasing of accident smoothly with the self-unloading concrete ship of the single oar and single rudder of tonnage.In addition, the tail fin that this ship adopts from test results, also has certain superiority with respect to the tail fin with the other types boats and ships of tonnage.

The ship of other tonnages will pass through the line style conversion, and for example simple spindle conversion just can be used this molded lines, builds the double tail fins self-unloading concrete ship with effect same of the present invention.

Claims

1. double tail fins self-unloading concrete ship is characterized in that:

Body left-right symmetric behind the said concrete ship;

All values is all in ± 5% scope.

2. according to the said double tail fins self-unloading of claim 1 concrete ship, the moldeed depth that it is characterized in that said concrete ship is 11 meters, and half-breadth is 11.25 meters.

3. according to the said double tail fins self-unloading of claim 1 concrete ship, it is characterized in that said concrete ship is 15000 deadweight cargo tonnagies.