CN204659960U

CN204659960U - A kind of midship cross section structure of large-scale ore carrier

Info

Publication number: CN204659960U
Application number: CN201520112652.4U
Authority: CN
Inventors: 陈灏; 王亮; 曾小芬; 韩国骏
Original assignee: Guangzhou Shipyard International Co Ltd
Current assignee: Cssc Offshore & Marine Engineering Group Co ltd; Guangzhou Shipyard International Co Ltd
Priority date: 2015-02-16
Filing date: 2015-02-16
Publication date: 2015-09-23
Anticipated expiration: 2025-02-16

Abstract

A midship cross section structure for large-scale ore carrier, tank top is provided with loading platform, and the below of loading platform is set to ballast tank, and the both sides of cargo hold are then set to sky cabin. The structure of this large-scale ore carrier improves the stressing conditions of tank top structure; The load between hatch deck can be effectively reduced, alleviate construction weight, add stability simultaneously; Ballast tank is located at below cargo hold, arranges continuously, and during ballast water displacement, there will not be left-right asymmetry situation, continuous uniform is arranged the bending and shearing that greatly reduce hull beam; Further, this kind of structure is that LNG tank and auxiliary device thereof have been reserved parking space, do not affect again cargo hold, and volume of compartment and the use of ballast tank also can not be reduced, and requirement to longitudinal strength etc. more advantageously can not be add because of the use of LNG.

Description

A kind of midship cross section structure of large-scale ore carrier

Technical field

The utility model relates to large-scale ore carrier, particularly relates to a kind of midship cross section structure of large-scale ore carrier.

Background technology

Large-scale ore carrier (Very Large Ore Carrier), mainly transports various ores in sand form, coal, or the boats and ships of steel, fertilizer, grain etc. large amount bulk cargo, and deadweight tonnage is generally more than 200,000 tons.

Existing large-scale ore carrier adopts double bottom structure, and the height of double bottom is less, and as the empty cabin of boats and ships, the both sides of cargo hold are then along ballast tank and empty cabin are alternately set on bow stern direction. The horizontal section of its ship midship, as shown in Figure 1, what the middle part degree of depth was large is cargo hold 101, and cargo hold is inverted trapezoidal, and two longitudinal bulkheads are intilted hypotenuse from top to bottom; Cargo hold 101 bottom is double bottom structure, and the height of double bottom is less, is to be empty cabin 102, and the both sides in cargo hold and empty cabin are along ballast tank 103 and empty cabin are alternately set on bow stern direction, and cargo hold top is deck 104; Fig. 2 is ship deck top view, and multiple holdhatch 105 compartment of terrain is along arranging on bow stern direction.

Existing double bottom structure form, because depth of hold is large, goods is very large to the pressure of the bilge, and floor creates very large bending stress, creates very large shearing force in floor end, bottom simultaneously. in order to meet yield strength requirement, floor cryptographically need to be set in bottom, the pressure that single floor bears is reduced by increasing the quantity of bottom floor, on floor, increase a large amount of flexing muscle or improved the frame flexion capabilities of structure by increasing floor thickness simultaneously, and bear huge cargo pressure and total longitudinal stress because of inner bottom plating simultaneously, need to use thicker sheet material. when certain cargo hold zero load, but absorb water when darker, seawater pressure outside port and starboard is very large, this pressure is by deck and polycrystalline substance transmission, but because they are all away from hydraulic pressure center, therefore very large moment of flexure on ship side structure, is create, according to the arrow of Fig. 3 and camber line, the direction of arrow is Center of Pressure height, the Bending moment distribution that camber line bears for topside, therefore require larger to the dimensions of corresponding construction, the outer seawater pressure of port and starboard is balanced by polycrystalline substance and deck, deck has again very large hatch, cause the compression on deck between hatch very large, as indicated by the arrows of fig. 2, it is very high that this causes flexing to require, a large amount of reinforcement need to be done, and when fully loaded, center of gravity is lower, roll frequency is high, and acceleration is comparatively large, makes goods comparatively large to the lateral pressure of board structure, also causes goods more easily to rock, be unfavorable for safety, moreover ballast tank is located at wing tank, and alternate with empty cabin, when ballast water is replaced, larger moment of torsion will be produced, higher to dependency structure requirement of strength, use the boats and ships of prior art in operation, generally to occur the situation that transversary destroys, this shows the version of prior art, and stressing conditions is more severe in actual use. in addition, liquefied natural gas (liquefied natural gas) be future source of energy main user to, according to existing regulation, topside apart within the scope of outside plate one fixed width (beam 1/5th or 11.5 meters, get in the two to obtain smaller value) forbid placing LNG tank, but at present due to not reserved LNG fuel parking space, when using LNG fuel later, cargo hold capacity need be taken, this must cause the minimizing of useful load, and LNG is comparatively applicable to being placed on and disembarks cabin the most nearby, because LNG proportion is little, volume of compartment utilization rate is low, compared with filling goods, decrease the load of tens thousand of tons, be equivalent to add afterbody buoyancy, vertical moment of flexure in whole ship is improved greatly, longitudinal strength is had higher requirement, strengthen on a large scale, useful load must be reduced again, and easily cause trim by head, and according to shipping transport convention, when boats and ships leave the port, trim by head is not allow to occur, if use the cargo hold of repacking to deposit LNG, the weight at former cargo hold place reduces, and whole ship center of gravity reach, easily causes trim by head, the moment of flexure of hanging down in full ship strengthens, and the requirement of longitudinal strength is improved, and decrease charging burden, refitting engineer is large, expense is many.

Summary of the invention

The utility model aims to provide a kind of midship cross section structure of large-scale ore carrier, to solve the excessive problem of deck loads between hatch, alleviates construction weight.

The midship cross section structure of large-scale ore carrier described in the utility model, comprise the cargo hold at middle part, the empty cabin of cargo hold both sides, and the ballast tank of tank top, the sidewalls orthogonal in empty cabin, the sidewalls orthogonal that cargo hold is adjacent with empty cabin, the below of the loading platform of tank top is ballast tank, the sidewalls orthogonal that ballast tank is adjacent with empty cabin.

The midship cross section structure of large-scale ore carrier described in the utility model, at boats and ships middle part, loading platform is set, and the top of platform is cargo hold, and below is then ballast tank, and both sides are empty cabin. Because of the ballast capacity requirement needed for ballast tank larger, so the double bottom of its highly relative existing structure is much bigger, and on the other hand, because of the space needed for empty cabin relatively little, so the empty cabin width of both sides is less relative to the both sides of double bottom structure, although so the height of cargo hold reduces to some extent than the height of hold of double bottom structure, add compartment width accordingly. So, under ensureing hold space nondecreasing prerequisite, the degree of depth of cargo hold effectively can be reduced, reduce the pressure of goods at the bottom of to cargo hold; Because height at the bottom of cargo hold improves, make at the bottom of cargo hold to heavens near natural axis, the total longitudinal stress bearing significantly reduces, and the dimensions of cargo hold bottom structure therefore can be reduced, and decreaseds whole bilge structure goods and the pressure differential of seawater below simultaneously. And, cargo hold center of gravity is moved, reduce the frequency of ship rolling, decrease acceleration when goods shakes with ship, can effectively prevent goods from toppling over to one side of cargo hold, concentrating, add stability, reduce risk. Moreover ballast tank and corresponding rib structure thereof make more large-area seawater pressure come and cargo pressure balance, improve the stressing conditions of tank top structure; Side plate hydraulic pressure center when height at the bottom of cargo hold approaches shipful drinking water more, the pressure of port and starboard seawater can better by transmitting and balance at the bottom of cargo hold, and wing tank structure can not be allowed to bear very large moment of flexure, and the pressure that between hatch, bear on deck significantly reduces. After wing tank is set to sky cabin, the pressure that the wing tank inner structure that full cabin ballast water pressure originally need be born is born will obviously reduce, and the bottom floor span of wing tank diminishes, and the bending and shearing that pressure produces all will reduce; Further, ballast tank is located at below cargo hold, arranges continuously, and during ballast water displacement, there will not be left-right asymmetry situation, continuous uniform is arranged the bending and shearing that greatly reduce hull beam; Finally, this kind of structure is that LNG tank and auxiliary device thereof have been reserved parking space, under the cargo hold of rising, be enough to arrange, and sufficient space is had can to arrange more even, only one to two ballast tank near cabin need be changed into LNG tank and deposit place, the wing tank of these positions is set to ballast tank simultaneously, cargo hold does not need to make any change, so both solve LNG tank storage problem, do not affect again cargo hold, also volume of compartment and the use of ballast tank can not be reduced, requirement to longitudinal strength etc. more advantageously can not be add because of the use of LNG.

Accompanying drawing explanation

Fig. 1 is the double bottom structure schematic diagram of existing large-scale ore carrier.

Fig. 2 is deck and the hatch structure schematic diagram of the shown large-scale ore carrier of Fig. 1.

Fig. 3 is the stressed schematic diagram of moment of flexure of the shown large-scale ore carrier of Fig. 1.

Fig. 4 is the midship cross section structure schematic diagram of large-scale ore carrier described in the utility model.

Fig. 5 is the stressed schematic diagram of the large-scale ore carrier of the shown midship cross section structure of Fig. 4.

Detailed description of the invention

As shown in Figure 4, a kind of midship cross section structure of large-scale ore carrier, comprise the cargo hold 1 at middle part, the empty cabin 4 of cargo hold both sides, and the ballast tank 3 of tank top, the sidewalls orthogonal in empty cabin 4, the sidewalls orthogonal that cargo hold 1 is adjacent with empty cabin, the below of the loading platform 2 of tank top is ballast tank 3, the sidewalls orthogonal that ballast tank 3 is adjacent with empty cabin 4.

The height of the loading platform at the bottom of cargo hold taking side plate hydraulic pressure center when absorbing water with shipful quite as good, the pressure of port and starboard seawater just in time can by transmitting and balance at the bottom of cargo hold, wing tank structure can not be allowed to bear very large moment of flexure, and the pressure that between hatch, bear on deck significantly reduces.

Be illustrated in figure 5 the stressed schematic diagram of large-scale ore carrier, this large-scale ore carrier structural response be pressurized, instead of be subject to curved. Stress level greatly can be reduced, and in figure, arrow is depicted as Center of Pressure height.

The longitudinal bulkhead 5 of cargo hold 1 vertically arranges; The middle part of loading platform 2 is horizontally disposed with, and both sides are the unloading plates 6 that are inclined upward to longitudinal bulkhead 5. Vertically disposed longitudinal bulkhead can improve the force structure of boats and ships, reduces deck loads between hatch; The setting of unloading plate then has the loading of being convenient to goods.

Claims

1. the midship cross section structure of a large-scale ore carrier, it is characterized in that: the cargo hold (1) that comprises middle part, the empty cabin (4) of cargo hold both sides, and the ballast tank of tank top (3), the sidewalls orthogonal in its sky cabin (4), the sidewalls orthogonal that cargo hold (1) is adjacent with empty cabin, the below of the loading platform (2) of tank top is ballast tank (3), the sidewalls orthogonal that ballast tank (3) is adjacent with empty cabin (4).

2. the midship cross section structure of large-scale ore carrier according to claim 1, is characterized in that: when the height of the loading platform (2) of tank top and shipful drinking water, side plate hydraulic pressure center is suitable.

3. the midship cross section structure of large-scale ore carrier according to claim 1 and 2, is characterized in that: the middle part of loading platform (2) is horizontally disposed with, and both sides are the unloading plates (6) that are inclined upward to longitudinal bulkhead (5).