Independent storage cabin saddle with floating stopping component

Abstract

An independent storage cabin saddle with a floating stopping component is provided with a movable saddle and a fixed saddle, the movable saddle and the fixed saddle are provided with supporting structures, and the lower portions of the supporting structures are fixed to a ship body structure through laminated wood. The movable saddle and the fixed saddle are each provided with two pairs of floating stopping components, the two pairs of floating stopping components are symmetrically arranged, and each pair of floating stopping components is symmetrically arranged on the two sides of the web. The bottom of a floating-stopping frame of the floating-stopping component is fixed to the ship body structure, a pressing component extends out of the top of the floating-stopping frame and is located above a transition flange at the bottom of the supporting structure, a floating-stopping wood block is fixed to the transition flange, and a distance exists between the pressing component and the floating-stopping wood block. A floating stopping device and a ship body reinforcing structure which are independently arranged are omitted, and on the basis that the requirement for supporting the tank body and the liquid cargo load is met, the buoyancy borne by the tank body under the accidental water inflow working condition is balanced, the structural stress is optimized, the structural weight is reduced, and the construction period is shortened.

Description

Technical Field

[0001] The invention belongs to the field of construction and design of shipping LNG storage tanks, and in particular relates to an independent storage tank saddle with an anti-floating component. Background Art

[0002] Driven by the transportation needs of LNG, LCO2, and other fuels, independent tanks are now widely used in shipbuilding projects. These tanks are connected to the ship's hull structure via support saddles, transferring the tank and liquid cargo loads during normal ship operation to the hull structure. To ensure the safety of the hull structure in the event of accidental flooding, an anti-floating device is installed on the top of the tank to transfer the tank's buoyancy to the hull structure. In current engineering applications, the tank saddle and anti-floating device are designed separately, necessitating the design of corresponding hull support structures for the saddle and anti-floating device.

[0003] Currently, commonly used anti-floating devices are complex, split-piece welded structures, requiring extensive welding and complex construction. For C-tank LCO2 carriers, the high density and pressure of LCO2 often restrict the diameter of the independent tanks. Furthermore, to ensure the vessel's load capacity and overall performance, the primary structural dimensions are typically large, leaving a significant gap between the independent tanks and the hull structure. Using the commonly used saddle and anti-floating device design approach in this situation would result in extremely large structural components, resulting in significant structural waste and increased complexity in hull construction. Summary of the Invention

[0004] To solve the above problems, the present invention provides an independent tank saddle with an anti-floating member, which aims to support the tank body and liquid cargo load, balance the buoyancy of the tank body under accidental water ingress conditions, optimize structural stress, reduce structural weight, and shorten construction period. The technical solution adopted is:

[0005] The utility model relates to an independent storage tank saddle with an anti-floating component. The independent storage tank is placed on the saddle. The saddle near one end of the independent storage tank close to the bow is a movable saddle, and the saddle near one end of the independent storage tank close to the stern is a fixed saddle.

[0006] The movable saddle and the fixed saddle are both composed of supporting structure, laminated wood and anti-floating components. The anti-floating components are located on both sides of the laminated wood. The supporting structure of the fixed saddle includes arc-shaped reinforced pads, transition flanges and webs. The curvature of the reinforced pads is adapted to the curvature of the surface of the independent storage tank, and the reinforced pads are fitted with the surface of the independent storage tank. The transition flanges are continuously arranged along the length direction of the reinforced pads under the reinforced pads. The transition flanges include a straight section in the middle and inclined sections on both sides. The shape after the straight section and the inclined section are connected is fitted with the hull structure. The width of the transition flange is greater than the width of the laminated wood and the reinforced pads. A web is fixed between the reinforced pads and the transition flanges, and reinforced brackets are symmetrically fixed on both sides of the webs. The reinforced brackets are right-angled trapezoids, and the right-angled sides of the reinforced brackets are welded to the webs.

[0007] Laminated wood is arranged between the transition flange and the hull structure, and limit baffles are fixed on both sides of the laminated wood. The limit baffles are continuously arranged from one end of the laminated wood to the other end. The limit baffles are divided into a first upper baffle and a first lower baffle. The top of the first upper baffle is fixed on the transition flange, and the bottom of the first lower baffle is fixed on the hull structure. There is a distance between the first upper baffle and the first lower baffle.

[0008] The supporting structure of the movable saddle is the same as that of the fixed saddle. The laminated wood of the movable saddle is divided into an upper laminated wood and a lower laminated wood. The upper laminated wood is located on one side of the lower laminated wood. A stainless steel plate is placed between the upper laminated wood and the lower laminated wood. The stainless steel plate is fixed to the lower laminated wood by bonding and rivets, and the upper laminated wood can slide along the stainless steel plate; a second upper baffle is fixed on both sides of the upper laminated wood, and a second lower baffle is fixed on both sides of the lower laminated wood. The width of the transition flange is greater than the width of the upper laminated wood, the lower laminated wood and the reinforced pad.

[0009] The movable saddle and the fixed saddle are each provided with two pairs of anti-floating components, which are symmetrically arranged at 1 / 3 to 1 / 2 of the tank diameter from the center line of the tank body, and each pair of anti-floating components are symmetrically arranged on both sides of the web; the anti-floating components include an anti-floating frame and a steel groove, the steel groove is fixed to the edge of the upper surface of the transition flange, and an anti-floating wooden block is placed in the steel groove, the anti-floating frame is arranged upright, the bottom of the anti-floating frame is fixed to the hull structure, and a pressing component protrudes from the top, and the pressing component is a frame type with a hollow interior. The pressing component is located above the anti-floating wooden block, and there is a gap between the pressing component and the anti-floating wooden block.

[0010] The above-mentioned independent storage tank saddle with an anti-floating component, further, has an angle α formed by the end of the web plate of 150~160°, a distance D1 between the end of the reinforced pad and the end of the reinforced bracket on the web plate of 100mm~200mm, and a distance D2 between the end of the transition flange and the end of the reinforced bracket plate of not less than 25mm; an angle γ formed between the boundary of the reinforced pad and the boundary of the web plate of 2.5°~5°, and a length of the reinforced pad within the range of γ of not less than 100mm.

[0011] The above-mentioned independent storage tank saddle with an anti-floating component further has a spacing between the first upper baffle and the first lower baffle of 50 mm.

[0012] The above-mentioned independent storage tank saddle with anti-floating component can further have an angle β between the free edge of the bracket plate and the transition flange ranging from 45° to 90°.

[0013] The above-mentioned independent storage tank saddle with anti-floating component further has a distance between the steel groove and the edge of the transition flange of 25 mm.

[0014] The above-mentioned independent storage tank saddle with an anti-floating component further has the anti-floating wooden block of 10mm to 15mm.

[0015] The above-mentioned independent storage tank saddle with anti-floating component further has the following advantages: the distance between the fixed saddle end anti-floating frame and the transition flange boundary is not less than 50 mm, and the distance between the movable saddle end anti-floating frame and the transition flange boundary is not less than ΔL + 50 mm.

[0016] The above-mentioned independent storage tank saddle with anti-floating component further has the anti-floating wooden block bonded to the steel groove and the transition flange.

[0017] The above-mentioned independent storage tank saddle with an anti-floating member, further, has the same width of the laminated wood of the fixed saddle and the upper laminated wood of the movable saddle, which is B1; the width of the lower laminated wood of the movable saddle is B2; the distances between the edge of the upper laminated wood and the edge of the lower laminated wood are D3 and D4, respectively, B2=B1+D3+D4, wherein △L+20mm ≤D3≤△L+30mm, D4 is 20mm~30mm, and △L is the cold shrinkage between the two saddles calculated based on the storage tank and the loading liquid cargo state.

[0018] The above-mentioned independent storage tank saddle with anti-floating components, further, has a top pressing component of the anti-floating frame with a width greater than a width of the anti-floating wooden block, and a top pressing component of the movable saddle is not less than 2△L away from a boundary D5 of the anti-floating wooden block in the direction of the ship length.

[0019] The beneficial effects of the present invention are:

[0020] 1. The saddle design can make full use of the hull structure and tank layout features. Anti-floating wooden blocks are set on the tank saddle, and the buoyancy of the tank under accidental water inflow conditions is balanced by anti-floating frames. This greatly simplifies the design of the anti-floating device and eliminates the additional anti-floating support reinforcement structure design of the hull. The structural weight of the saddle and anti-floating device is greatly reduced, the construction period is shortened, and the construction difficulty is reduced.

[0021] 2. The present invention balances the anti-floating load through the anti-floating frame at the bottom of the tank body, rather than the traditional anti-floating device at the top of the tank body, so that the force path is shorter, the buoyancy of the tank body is more effectively balanced, and the impact on the tank body design caused by the additional anti-floating device on the top is avoided.

[0022] 3. Since there is no need to install an additional anti-floating device on the upper end of the tank, it provides space for optimizing the cabin layout for LCO2 ships where the layout space is limited by the anti-floating device, thereby improving the overall performance of the ship.

[0023] 4. The tank can be pre-assembled with the supporting structure and then directly hoisted and installed on the laminated wood of the hull structure, which improves the integration of the tank product and reduces the difficulty of assembly;

[0024] 5. The final support structure for loading onto the ship can also serve as a temporary saddle during the tank construction phase. It can be transported and installed together with the tank, eliminating the need for a temporary saddle and improving economic efficiency.

[0025] 6. The laminated wood is directly connected to the transition flange of the supporting structure and the hull structure. The laminated wood is arranged in a flat surface instead of the traditional curved surface along the surface of the tank, which reduces the construction difficulty and improves the construction accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the present invention;

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of the fixed saddle at AA;

[0028] Figure 3 It is a schematic diagram of the cross-sectional structure of the movable saddle at AA;

[0029] Figure 4 It is a structural diagram of the anti-floating component BB at the movable saddle;

[0030] Among them, 1-independent storage tank, 2-reinforced pad, 3-web, 4-elbow plate, 5-laminated wood, 6-first upper baffle, 7-first lower baffle, 8-second upper baffle, 9-second lower baffle, 10-upper laminated wood, 11-lower laminated wood, 12-hull structure, 13-transition flange, 14-stainless steel plate, 15-floating frame, 16 steel groove, 17 float-stopping wooden block. DETAILED DESCRIPTION

[0031] The present invention will be further described with reference to the accompanying drawings.

[0032] like Figure 1 An independent storage tank saddle with an anti-floating component is shown. The independent storage tank is placed on the saddle. The saddle near the bow end of the independent storage tank is a movable saddle, and the saddle near the stern end is a fixed saddle.

[0033] Both the movable saddle and the fixed saddle are composed of a supporting structure, laminated wood and anti-floating components. The anti-floating components are located on both sides of the laminated wood, such as Figure 2 As shown, the support structure of the fixed saddle includes a curved reinforcement pad, a transition flange, and a web. The curvature of the reinforcement pad matches the curvature of the independent tank surface, and the reinforcement pad and the independent tank are concentric and conform to the independent tank surface. The transition flange is arranged continuously along the length of the reinforcement pad below the reinforcement pad. The transition flange includes a straight section in the middle and inclined sections on both sides. The shape of the straight and inclined sections after connection conforms to the hull structure.

[0034] In this embodiment, the wrap angle α formed by the web ends is 156°, ensuring load transfer and structural safety between the independent tanks and the saddle during navigation. The wrap angle γ formed by the distance between the ends of the reinforcement pads and the web ends is 3.5°. The reinforcement pad length A within γ is 450mm, meeting load transfer requirements while reducing the range of laminated wood layout.

[0035] like Figure 2 As shown, laminated timber is installed between the transition flange and the hull structure. The timber runs along the entire length of the flange plate, transferring tank loads to the hull structure. The width of the timber meets the pressure-bearing requirements of the independent tanks while also providing insulation against liquid cargo temperature. Limit baffles are fixed on both sides of the timber. The timber is bonded to the baffles and the transition flange, and the baffles are arranged continuously from one end of the timber to the other. The baffles that secure the saddle are divided into a first upper baffle and a first lower baffle. The top of the first upper baffle is fixed to the transition flange, while the bottom of the first lower baffle is fixed to the hull structure. There is a gap between the first upper baffle and the first lower baffle, and the gap H between the first upper baffle and the first lower baffle is 50 mm. The first upper baffle and the first lower baffle restrict the movement of the timber along the length of the ship, thereby limiting the movement of the independent tanks along the length of the ship.

[0036] The width of the transition flange is greater than that of the laminated lumber and the reinforcing pad. A web is fixed between the reinforcing pad and the transition flange. Reinforcing brackets are symmetrically fixed on either side of the web. The reinforcing brackets are trapezoidal in shape, with their right-angled sides welded to the web. They reinforce the web to meet load transfer requirements. In this embodiment, the laminated lumber width B1 is 300mm, the reinforcing bracket length L1 is 500mm, the bracket length L2 is 280mm, the angle β between the free edge of the bracket and the transition flange is 67°, and the distance D2 between the edge of the bracket and the edge of the transition flange is 25mm.

[0037] like Figure 3As shown, the support structure of the movable saddle is identical to that of the fixed saddle. The laminated timber of the movable saddle is divided into an upper layer of laminated timber and a lower layer of laminated timber. The upper layer of laminated timber is located to one side of the lower layer of laminated timber. A stainless steel plate is placed between the upper and lower layers of laminated timber. The stainless steel plate is fixed to the lower layer of laminated timber by bonding and rivets, and the upper layer of laminated timber can slide along the stainless steel plate. The distance between each edge of the stainless steel plate and the outer edge of the lower layer of laminated timber is 25 mm. The stainless steel plate is used to reduce frictional resistance at the laminated timber interface, facilitating the expansion and contraction movement of the tank along the length of the ship under temperature loads. A second upper baffle is fixed on both sides of the upper layer of laminated timber, and a second lower baffle is fixed on both sides of the lower layer of laminated timber. The width of the transition flange is greater than the width of the upper and lower layers of laminated timber, as well as the reinforcing pad.

[0038] The width of the laminated timbers in the fixed saddle and the upper laminated timbers in the movable saddle are the same, 300 mm. In this embodiment, the shrinkage ΔL of the upper laminated timber along the length of the vessel along the length of the lower laminated timber, as determined by temperature field analysis, is 30 mm. At room temperature, the distance D3 from the edge of the upper laminated timber to the edge of the lower laminated timber is set to 50 mm, and D4 is set to 20 mm, which can meet the requirements for expansion and contraction of the tank along the length of the vessel under temperature loads.

[0039] like Figure 4 As shown, the movable saddle and the fixed saddle are each provided with four anti-floating members, which are arranged at 2 / 5 of the tank diameter from the center line of the tank body and are arranged symmetrically about the web and the center of the tank body. Figure 4 As shown, the anti-floating structure includes an anti-floating frame and a steel groove. The steel groove is fixed to the upper edge of the transition flange. A anti-floating wooden block is placed in the steel groove. The anti-floating frame is arranged upright, with its bottom fixed to the hull structure and a pressing member protruding from the top, pressing against the anti-floating wooden block. In this embodiment, the distance between the steel groove and the edge of the transition flange is 25 mm, the top of the anti-floating wooden block is 10 mm from the lower edge of the top pressing member, the distance between the fixed saddle end anti-floating frame and the transition flange edge is 50 mm, and the distance between the movable saddle end anti-floating frame and the transition flange edge is 80 mm. When the ship is flooded, the independent storage tank tends to move upward due to buoyancy. The storage tank drives the transition flange upward through the saddle support structure, thereby driving the anti-floating wooden block upward. The anti-floating frame contacts the anti-floating wooden block, balancing the buoyancy of the storage tank.

[0040] The width of the top pressing member of the anti-floating frame is greater than the width of the anti-floating wooden block, and the top pressing member of the movable saddle is at least 2ΔL away from the edge D5 of the anti-floating wooden block in the ship's length direction. In this embodiment, the top pressing member of the anti-floating frame at the fixed saddle end is 50mm away from the edge of the anti-floating wooden block, and the top pressing member at the movable saddle end is 100mm away from the edge of the anti-floating wooden block, meeting the requirements for the telescopic movement of the tank along the ship's length under temperature loads.

[0041] The present invention provides an independent tank saddle with an anti-floating function, which eliminates separately set anti-floating devices and hull reinforcement structures. On the basis of meeting the support requirements for the tank body and liquid cargo load, it balances the buoyancy of the tank body under accidental water inflow conditions, optimizes the structural stress, and reduces the structural weight. The present invention designs the connection interface between the tank and the hull into a flat form, which improves the integration of the tank, reduces the construction difficulty, and shortens the construction period. The integrated tank saddle provided by the present invention eliminates the temporary saddle during the tank construction stage, thereby improving the economy.

Claims

1. An independent storage tank saddle with an anti-floating member, characterized in that: The independent storage tank is placed on a saddle. The saddle near the bow end of the independent storage tank is a movable saddle, and the saddle near the stern end is a fixed saddle. The movable saddle and the fixed saddle are both composed of a supporting structure, laminated wood and anti-floating components. The anti-floating components are located on both sides of the laminated wood. The supporting structure of the fixed saddle includes an arc-shaped reinforced pad, a transition flange and a web. The curvature of the reinforced pad is adapted to the curvature of the surface of the independent storage tank, and the reinforced pad fits the surface of the independent storage tank. The transition flange is continuously arranged below the reinforced pad along the length direction of the reinforced pad. The transition flange includes a straight section in the middle and inclined sections on both sides. The shape of the straight section and the inclined section after connection fits the hull structure. The width of the transition flange is greater than the width of the laminated wood and the reinforced pad. A web is fixed between the reinforced pad and the transition flange, and reinforced brackets are symmetrically fixed on both sides of the web. The reinforced bracket is a right-angled trapezoid, and the right-angled sides of the reinforced bracket are welded to the web. An insulating layer is laid on the outside of the tank body, the outside of the web, and the outside of the reinforced bracket. Laminated wood is provided between the transition flange and the hull structure, and limit baffles are fixed on both sides of the laminated wood. The limit baffles are continuously provided from one end of the laminated wood to the other end. The limit baffles are divided into a first upper baffle and a first lower baffle. The top of the first upper baffle is fixed on the transition flange, and the bottom of the first lower baffle is fixed on the hull structure. There is a distance between the first upper baffle and the first lower baffle. The support structure of the movable saddle is the same as that of the fixed saddle. The laminated wood of the movable saddle is divided into an upper laminated wood and a lower laminated wood. The upper laminated wood is located on one side of the lower laminated wood. A stainless steel plate is placed between the upper and lower laminated wood layers. The stainless steel plate is fixed to the lower laminated wood layer by bonding and rivets, and the upper laminated wood layer can slide along the stainless steel plate. A second upper baffle is fixed on both sides of the upper laminated wood layer, and a second lower baffle is fixed on both sides of the lower laminated wood layer. The width of the transition flange is greater than the width of the upper laminated wood layer, the lower laminated wood layer and the reinforcing pad. The movable saddle and the fixed saddle are each provided with two pairs of anti-floating components, and the two pairs of anti-floating components are symmetrically arranged, and each pair of anti-floating components are symmetrically arranged on both sides of the web; the anti-floating components include an anti-floating frame and a steel groove, the steel groove is fixed to the edge of the upper surface of the transition flange, and an anti-floating wooden block is placed in the steel groove. The anti-floating frame is arranged upright, and the bottom of the anti-floating frame is fixed to the hull structure, and a pressing component protrudes from the top. The pressing component is a frame type with a hollow interior. The pressing component is located above the anti-floating wooden block, and there is a gap between the pressing component and the anti-floating wooden block.

2. The independent storage tank saddle with an anti-floating member according to claim 1, characterized in that: The wrap angle α formed at the end of the web is 150~160°, the distance D1 between the end of the reinforcing pad and the end of the reinforcing bracket on the web is 100mm~200mm, and the distance D2 between the end of the transition flange and the end of the reinforcing bracket is not less than 25mm; the wrap angle γ formed between the boundary of the reinforcing pad and the boundary of the web is 2.5°~5°, and the length A of the reinforcing pad within the range of γ is not less than 100mm.

3. The independent storage tank saddle with an anti-floating member according to claim 1, characterized in that: The distance between the first upper baffle and the first lower baffle is 50 mm.

4. The independent storage tank saddle with an anti-floating member according to claim 1, characterized in that: The included angle β between the free edge of the bracket and the transition flange ranges from 45° to 90°.

5. The independent storage tank saddle with an anti-floating member according to claim 1, characterized in that: The distance between the steel groove and the edge of the transition flange is 25mm.

6. The independent storage tank saddle with an anti-floating member according to claim 1, characterized in that: The top of the anti-floating wooden block is 10mm~15mm away from the lower edge of the top pressing member.

7. The independent storage tank saddle with an anti-floating member according to claim 1, characterized in that: The distance between the fixed saddle end stop and the transition flange edge is not less than 50mm, and the distance between the movable saddle end stop and the transition flange edge is not less than △L + 50mm, where △L is the cold shrinkage between the two saddles calculated based on the storage tank and liquid cargo loading conditions.

8. The independent storage tank saddle with an anti-floating member according to claim 1, characterized in that: The anti-floating wooden block is bonded to the steel groove and the transition flange.

9. The independent storage tank saddle with an anti-floating member according to claim 7, characterized in that: The width of the laminated wood of the fixed saddle is the same as the width of the upper laminated wood of the movable saddle, which is B1. The width of the lower laminated wood of the movable saddle is B2. The distances between the edge of the upper laminated wood and the edge of the lower laminated wood are D3 and D4 respectively. B2=B1+D3+D4, among which △L +20mm≤D3≤△L +30mm, and D4 is 20mm~30mm.

10. The independent storage tank saddle with an anti-floating member according to claim 7, characterized in that: The width of the top pressing component of the anti-floating frame is greater than the width of the anti-floating wooden block, and the top pressing component of the movable saddle is not less than 2△L away from the boundary D5 of the anti-floating wooden block in the direction of the ship's length.

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