Oil tanker cargo hold structure without platform on bilge bottom side tank upper bevel

Abstract

The utility model relates to the technical field of ship manufacturing, and discloses a bilge bottom side tank upper bevel platform-free oil tanker cargo hold structure which comprises a main deck, a longitudinal bulkhead, an inner shell, an outer shell, a double-layer bottom and a transverse bulkhead which are connected with one another to form a cargo hold. A bilge bottom side tank is arranged at the joint of the inner shell and the outer shell and the double-layer bottom, a bottom side tank inclined plate is arranged on the side, located in the cargo hold, of the bilge bottom side tank, a horizontal aggregate is arranged at the upper break angle where the bottom side tank inclined plate is connected with the inner shell and the outer shell, and a T-shaped profile for heightening a web is arranged on the broadside of the bilge bottom side tank. And a middle platform is arranged between the horizontal permanent inspection channel and the height of the inner bottom of the double-layer bottom in the vertical direction of the transverse bulkhead. No platform is arranged on the bilge bottom side cabin upper break angle, and no horizontal truss is arranged at the height position of the transverse bulkhead bottom side cabin upper break angle, so that the structural weight can be reduced, the construction process is saved, the operation cost is reduced, and the economical efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shipbuilding, in particular to a cargo hold structure of an oil tanker without a platform at the upper fold of the bilge bottom tank. Background Art

[0002] As a traditional type of transport ship, the traditional cargo hold structure of an oil tanker is as Figures 5 to 7 shown, which consists of a main deck 1, one or two longitudinal bulkheads 2, and a double bottom 9. Its outer shell 3 is composed of a vertical side shell plate, an arc-shaped bilge, and a flat bottom. The inner shell 4 is composed of a vertical inner shell plate, a bilge bottom tank inclined plate 11, and a horizontal inner bottom. The inner shell 3 and the outer shell 4 are connected by horizontal girders and bottom longitudinal girders.

[0003] For an oil tanker, the traditional layout of the cargo hold structure generally sets a platform at the height of the upper fold 7 of the bilge bottom tank 10, and the platform is connected to the horizontal girder 24 of the transverse bulkhead 8. However, it is found in the design process that the stress level of the platform at the upper fold of the bilge bottom tank is relatively low. Considering the requirements of the PMA (Permanent Means of Access) passage rules, the platform at the upper fold of the bilge bottom tank is relatively close to the inner bottom, which limits the design height of the platforms and the horizontal girders of the transverse bulkheads at other positions. As a result, traditional oil tankers generally require three horizontal girders, with a large number of parts, increasing the weight of the hull structure and being unfavorable for the cost control of the shipyard. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is that there are a large number of parts in the bilge bottom tank of the existing cargo hold, the weight of the hull structure is large, and the cost of the shipyard is high.

[0005] To solve the above technical problems, the technical solution of the utility model is to provide a cargo hold structure of an oil tanker without a platform at the upper fold of the bilge bottom tank, which includes a main deck, longitudinal bulkheads, an inner shell, an outer shell, a double bottom, and transverse bulkheads. The main deck, longitudinal bulkheads, inner shell, outer shell, double bottom, and transverse bulkheads are connected to each other to form a cargo hold. Among them, the double bottom is arranged at the bottom, the longitudinal bulkheads are arranged on one side, the inner shell and the outer shell are arranged on the other side opposite to the longitudinal bulkheads, the transverse bulkheads are arranged on the remaining two side surfaces, the main deck is arranged at the top. A bilge bottom tank is provided at the connection of the inner shell and the outer shell with the double bottom. A bilge bottom tank inclined plate is provided on one side inside the cargo hold of the bilge bottom tank. Horizontal stiffeners are arranged at the upper fold where the bilge bottom tank inclined plate is connected to the inner shell and the outer shell. A T-shaped section with a raised web is provided on the side of the bilge bottom tank. A horizontal PMA is provided below the main deck. An intermediate platform is provided vertically on the transverse bulkhead between the height of the horizontal PMA and the inner bottom of the double bottom.

[0006] Optionally, the intermediate platform includes an inboard platform between double hulls on the ship's side, horizontal girders of transverse bulkheads, and horizontal girders of longitudinal bulkheads. The inboard platform between double hulls on the ship's side is arranged on the inner hull, the horizontal girders of transverse bulkheads are arranged on the transverse bulkheads, and the horizontal girders of longitudinal bulkheads are arranged on the longitudinal bulkheads.

[0007] Optionally, the horizontal PMA is not more than 3 m away from the longitudinal members of the main deck, and the angle between the inclined plate of the bottom side tank and the horizontal plane is 35° to 60°.

[0008] Optionally, the height of the upper fold angle of the inclined plate of the bottom side tank is determined according to the tank capacity, and the size of the horizontal stiffeners is determined by code calculation and finite element analysis to meet the structural strength requirements.

[0009] Optionally, the T-section is horizontally arranged within 6 m from the baseline, and the height of the T-section is 600 mm to 1000 mm.

[0010] Optionally, the height H of the intermediate platform, the height H1 of the horizontal PMA, and the height H2 of the inner bottom satisfy the following relationship:

[0011] H = (H1 + H2) / 2 × (1 ± 10%).

[0012] In summary, the present utility model has at least one of the following beneficial effects:

[0013] 1. In the present utility model, no platform is provided at the upper fold angle of the bilge bottom side tank, and no horizontal girder is provided at the height of the upper fold angle of the bottom side tank of the transverse bulkhead, reducing one side platform and one horizontal girder of the transverse bulkhead, which can reduce the structural weight, lower the construction cost, save the construction process, and at the same time reduce the operation cost and improve the economy.

[0014] 2. The present utility model places the height of the intermediate platform in the middle of the vertical stiffeners of the transverse bulkhead, playing a role in evenly distributing the span of the vertical stiffeners, which is beneficial to controlling the deformation of the transverse bulkhead.

[0015] 3. The present utility model reduces one horizontal girder, improving the convenience of cargo hold cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the weak frame structure of the cargo hold of an oil tanker without a platform at the upper fold angle of the bilge bottom side tank of the present utility model;

[0017] Figure 2 It is a structural diagram of the transverse bulkhead of the cargo hold of an oil tanker without a platform at the upper fold angle of the bilge bottom side tank of the present utility model;

[0018] Figure 3 For Figure 2 at the A-A section in

[0019] Figure 4It is a horizontal structural diagram of the intermediate platform without a platform at the upper corner of the bilge hopper tank of the utility model;

[0020] Figure 5 This is a weak frame structure diagram of a conventionally arranged tanker cargo hold;

[0021] Figure 6 This is the transverse bulkhead structure diagram of the cargo hold of a conventionally arranged oil tanker;

[0022] Figure 7 for Figure 6 The middle BB section is the horizontal plane structure diagram of the upper corner of the hopper tank in the traditional arrangement;

[0023] In the figure: 1. main deck; 2. longitudinal bulkhead; 3. inner hull; 4. outer hull; 7. upper angle; 8. transverse bulkhead; 9. double bottom; 10. bilge tank; 11. hopper tank sloping plating; 12. horizontal frame; 13. T-section; 21. horizontal PMA; 22. intermediate platform; 23. inner bottom; 24. horizontal girder. DETAILED DESCRIPTION

[0024] The following combination Figures 1 - 7 The utility model is described in further detail.

[0025] The utility model discloses a cargo tank structure of an oil tanker with a folded corner and no platform on the bilge tank. Figure 1 and Figure 2 , comprising a main deck 1, a longitudinal bulkhead 2, an inner hull 3, an outer hull 4, a double bottom 9 and a transverse bulkhead 8, which are interconnected to form a cargo hold, wherein the double bottom 9 is arranged at the bottom, the longitudinal bulkhead 2 is arranged at one side, the inner hull 3 and the outer hull 4 are arranged at the other side opposite to the longitudinal bulkhead 2, the transverse bulkhead 8 is arranged at the remaining two sides, the main deck 1 is arranged at the top, a bilge hopper tank 10 is arranged at the connection between the inner hull 3 and the outer hull 4 and the double bottom 9, and a bilge hopper tank inclined plate 11 is arranged on one side of the bilge hopper tank 10 located inside the cargo hold.

[0026] In a further embodiment, referring to Figure 3 and Figure 4 , a horizontal frame 12 is arranged at the upper corner 7 where the hopper tank sloping plate 11 is connected with the inner shell 3 and the outer shell 4, a T-section 13 with a heightened web is arranged on the side of the bilge hopper tank 10 as a permanent inspection channel, a horizontal PMA 21 is arranged under the main deck 1, the double bottom 9 includes an inner bottom 23 located inside the cargo hold, and an intermediate platform 22 is arranged between the horizontal PMA 21 and the height of the inner bottom 23 of the double bottom 9 in the vertical direction of the transverse bulkhead 8, the intermediate platform 22 includes a side double shell inner platform, a transverse bulkhead horizontal girder and a longitudinal bulkhead horizontal girder, the side double shell inner platform is arranged on the inner shell 3, the transverse bulkhead horizontal girder is arranged on the transverse bulkhead 8, and the longitudinal bulkhead horizontal girder is arranged on the longitudinal bulkhead 2.

[0027] Specifically, the horizontal PMA21 is no more than 3 m away from the longitudinal frame 1 of the main deck, does not participate in the hull structural strength, meets the requirements of the inspection passage. The included angle between the inclined bottom plate 11 of the double bottom tank and the horizontal plane is 35° to 60°. The height of the upper fold angle 7 of the inclined bottom plate 11 of the double bottom tank is determined according to the tank volume. The size of the horizontal stiffener 12 is determined by code calculation and finite element analysis to meet the structural strength requirements. The T-section 13 is horizontally arranged within 6 m from the baseline. The height of the T-section 13 is 600 mm to 1000 mm. The web can be stiffened and the face plate can be eccentric, serving as a permanent inspection passage.

[0028] The height H of the intermediate platform 22, the height H1 of the horizontal PMA21, and the height H2 of the inner bottom 23 satisfy the following relationship:

[0029] H = (H1 + H2) / 2 × (1 ± 10%).

[0030] In the present utility model, no platform is provided at the upper fold angle 7 of the bilge double bottom tank 10, and no horizontal girder is provided at the height of the upper fold angle of the double bottom tank of the transverse bulkhead 8. One side platform and one horizontal girder of the transverse bulkhead are reduced, which can reduce the structural weight, lower the construction cost, save the construction process, and at the same time reduce the operation cost and improve the economy.

[0031] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model.

Claims

1. An oil tanker cargo hold structure with a folded corner without a platform at the bottom of the bilge, comprising a main deck (1), longitudinal bulkheads (2), inner hull (3), outer hull (4), double bottom (9) and transverse bulkheads (8), characterized in that, The main deck (1), longitudinal bulkhead (2), inner hull (3), outer hull (4), double bottom (9) and transverse bulkhead (8) are interconnected to form a cargo hold. Among them, the double bottom (9) is arranged at the bottom, the longitudinal bulkhead (2) is arranged on one side, the inner hull (3) and the outer hull (4) are arranged on the other side opposite to the longitudinal bulkhead (2), the transverse bulkhead (8) is arranged on the remaining two side surfaces, the main deck (1) is arranged at the top. At the connection of the inner hull (3) and the outer hull (4) with the double bottom (9), a bilge hopper tank (10) is provided. On one side inside the cargo hold of the bilge hopper tank (10), a hopper tank sloping plate (11) is provided. At the upper fold angle (7) where the hopper tank sloping plate (11) is connected to the inner hull (3) and the outer hull (4), horizontal stiffeners (12) are arranged. On the side of the bilge hopper tank (10), a T-section with a heightened web is provided (13). Below the main deck (1), a horizontal PMA (21) is provided. Vertically, an intermediate platform (22) is provided on the transverse bulkhead (8) between the height of the horizontal PMA (21) and the inner bottom (23) of the double bottom (9).

2. The cargo hold structure of an oil tanker without a platform at the upper fold of the bilge bottom tank according to claim 1, characterized in that, The intermediate platform (22) includes an inner platform between double hulls on the side, a horizontal girder on the transverse bulkhead and a horizontal girder on the longitudinal bulkhead. The inner platform between double hulls on the side is arranged on the inner hull (3), the horizontal girder on the transverse bulkhead is arranged on the transverse bulkhead (8), and the horizontal girder on the longitudinal bulkhead is arranged on the longitudinal bulkhead (2).

3. The cargo hold structure of an oil tanker without a platform at the upper fold of the bilge bottom tank according to claim 1, characterized in that, The horizontal PMA (21) is not more than 3 m away from the longitudinal stiffeners of the main deck (1). The angle between the hopper tank sloping plate (11) and the horizontal plane is 35° to 60°.

4. The cargo hold structure of an oil tanker without a platform at the upper fold of the bilge bottom tank according to claim 3, characterized in that, The height of the upper fold angle (7) of the hopper tank sloping plate (11) is determined according to the calculation of the cargo hold volume. The size of the horizontal stiffeners (12) is determined by code calculation and finite element analysis to meet the requirements of structural strength.

5. The cargo hold structure of an oil tanker without a platform at the upper fold of the bilge bottom tank according to claim 1, characterized in that, The T-section (13) is horizontally arranged within a range of 6 m from the baseline, and the height of the T-section (13) is 600 mm to 1000 mm.

6. The cargo hold structure of an oil tanker without a platform at the upper fold of the bilge bottom tank according to claim 1, characterized in that, The height H of the intermediate platform (22), the height H1 of the horizontal PMA (21) and the height H2 of the inner bottom (23) satisfy the following relationship: H = (H1 + H2) / 2×(1 ± 10%).

Images