C-shaped independent storage cabin saddle with floating stopping component

Abstract

A C-shaped 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 at the positions away from the center line of the tank by 1 / 3-1 / 2 of the diameter of the tank, 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 a C-type independent storage tank saddle with an anti-floating component. Background Art

[0002] Based on the transportation needs of LNG, LCO2, etc., C-type independent tanks have been widely used in actual ship engineering. The independent tank is connected to the hull structure through a supporting saddle, which is used to transfer the tank and liquid cargo load during normal operation of the ship to the hull structure; at the same time, in order to ensure the safety of the hull structure under accidental water inflow conditions, an anti-floating device is installed on the top of the tank to transfer the buoyancy of the tank to the hull structure. In current engineering applications, the tank saddle and the anti-floating device are designed separately, so it is necessary to design the hull support structure corresponding to the saddle and the anti-floating device.

[0003] At present, the commonly used anti-floating devices are all complex split-type welded structures with large welding volume and complex construction. For C-type tank LCO2 transport ships, due to the high density and pressure of LCO2, the diameter of the independent storage tank is usually limited; at the same time, in order to ensure the ship's load capacity and overall performance, the main scale of the structure is usually large, leaving a large gap between the independent storage tank and the hull structure. At this time, if the saddle and anti-floating device design method commonly used in engineering is adopted, the matching saddle and anti-floating device related structural parts will be very large, resulting in serious structural waste and increasing the complexity of the hull structure construction. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a C-type independent tank saddle with an anti-floating member, which aims to balance the buoyancy of the tank under accidental water inflow conditions on the basis of supporting the tank and liquid cargo load, optimize the structural stress, reduce the structural weight, and shorten the construction period. The technical solution adopted is: The utility model relates to a C-type independent storage tank saddle with an anti-floating component. The C-type independent storage tank is placed on the saddle. The saddle of the C-type independent storage tank near one end of the bow is a movable saddle, and the saddle near one end of the stern is a fixed saddle.

[0005] 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 C-type storage tank, the reinforced pad is fitted with the surface of the C-type 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 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 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 brackets are right-angled trapezoids, and the right-angle sides of the reinforced brackets are welded to the web.

[0006] 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 to the other end of the laminated wood. 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.

[0007] 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.

[0008] 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 is symmetrically arranged on both sides of the web. The anti-floating components include an anti-floating frame and a steel groove, which 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 vertically, and the bottom of the anti-floating frame is fixed to the hull structure, and a pressure plate is protruded from the top to press on the anti-floating wooden block.

[0009] The above-mentioned C-type independent storage tank saddle with 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.

[0010] The above-mentioned C-type independent storage tank saddle with anti-floating component, further, the spacing between the first upper baffle plate and the first lower baffle plate is 50 mm.

[0011] The above-mentioned C-type independent storage tank saddle with anti-floating component, further, the angle β between the free edge of the bracket and the transition flange ranges from 45° to 90°.

[0012] The above-mentioned C-type 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.

[0013] The above-mentioned C-type independent storage tank saddle with anti-floating component, further, the first upper baffle plate, the first lower baffle plate, the second upper baffle plate, and the second lower baffle plate are bonded with laminated wood.

[0014] The above-mentioned C-type independent storage tank saddle with anti-floating components, further, the distance between the fixed saddle end anti-floating frame and the transition flange boundary is not less than 50mm, and the distance between the movable saddle end anti-floating frame and the transition flange boundary is not less than △L + 50mm, △L is the cold shrinkage between the two saddles calculated according to the storage tank and the loading liquid cargo state.

[0015] The above-mentioned C-type independent storage tank saddle with anti-floating components, further, the anti-floating wooden block is bonded to the steel groove and the transition flange, and there is a distance of 10mm~15mm between the anti-floating wooden block and the pressure plate.

[0016] The above-mentioned C-type independent storage tank saddle with anti-floating component, further, 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, wherein, △L+20mm ≤D3≤△L +30mm, and D4 is 20mm~30mm.

[0017] The above-mentioned C-type independent storage tank saddle with anti-floating components, further, the width of the top pressure plate of the anti-floating frame is greater than the width of the anti-floating wooden block, and the top pressure plate 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 length.

[0018] The specific implementation process is as follows: 1) The tank body is constructed and the reinforcement pad is installed on the outer wall of the tank body.

[0019] 2) After the transition flange, web plate and reinforcing bracket of the saddle support structure are constructed, the transition flange, laminated wood upper baffle and laminated wood are installed.

[0020] 3) Lift and install the tank onto the saddle support structure.

[0021] 4) Lay an insulating layer on the outside of the tank body and the outside of the web and bracket of the saddle support structure.

[0022] 5) The hull structure is completed and the laminated wood fenders on one side of the hull are installed on the hull structure.

[0023] 6) The tank body and saddle are hoisted as a whole, and the laminated wood is glued to the lower baffle of the hull side and the hull structure.

[0024] 7) Install the connecting bolts.

[0025] The beneficial effects of the present invention are: 1. The saddle design can make full use of the hull structure and tank layout characteristics, set anti-floating wooden blocks on the tank saddle, and balance the buoyancy of the tank under accidental water inflow conditions through anti-floating frames, which greatly simplifies the design of the anti-floating device and cancels the additional anti-floating support reinforcement structure design of the hull, greatly reducing the structural weight of the saddle and anti-floating device, shortening the construction period and reducing the construction difficulty.

[0026] 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 influence of the additional anti-floating device on the top on the tank body design is avoided.

[0027] 3. Since there is no need to install an additional anti-floating device on the upper end of the tank, for LCO2 ships whose layout space is limited by the anti-floating device, space is provided for optimizing the cabin layout, which is conducive to improving the overall performance of the ship.

[0028] 4. The tank can be assembled with the supporting structure in advance 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; 5. The final loading support structure can also serve as a temporary saddle during the tank construction phase and can be transported and installed together with the tank, eliminating the design of the temporary saddle and improving economic efficiency; 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 plane 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

[0029] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is the schematic diagram of the cross-section structure of the fixed saddle AA; Figure 3 It is the schematic diagram of the cross-section structure of the movable saddle AA; Figure 4 This is a schematic diagram of the structure of the anti-floating component at the movable saddle BB; Among them, 1-C type 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-proof wooden block. DETAILED DESCRIPTION

[0030] The present invention will be further described in conjunction with the accompanying drawings.

[0031] like Figure 1 A C-type independent storage tank saddle with an anti-floating component is shown, and the C-type independent storage tank is placed on the saddle. The saddle of the C-type independent storage tank near the bow end is a movable saddle, and the saddle near the stern end is a fixed saddle.

[0032] 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 supporting structure of the fixed saddle includes an arc-shaped reinforcement pad, a transition flange and a web. The curvature of the reinforcement pad matches the curvature of the surface of the C-type tank. The reinforcement pad is concentric with the C-type tank and fits the surface of the C-type tank. The transition flange is continuously arranged below the reinforcement pad along the length direction of the reinforcement 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.

[0033] In this embodiment, the wrap angle α formed by the web end is 156°, thereby ensuring the load transfer and structural safety between the independent storage tank and the saddle during the voyage of the ship. The wrap angle γ formed by the distance between the end of the reinforcement pad and the end of the web is 3.5°, and the length A of the reinforcement pad within the γ range is 450mm, which can meet the load transfer requirements while reducing the layout range of the laminated wood.

[0034] like Figure 2As shown, laminated wood is arranged between the transition flange and the hull structure. The laminated wood is arranged along the entire length of the flange plate to transfer the tank load to the hull structure. The width of the laminated wood meets the pressure-bearing requirements of the independent tank to transfer the load, and at the same time, the insulation of the liquid cargo temperature is achieved. Limit baffles are fixed on both sides of the laminated wood. The laminated wood is bonded to the limit baffles and the transition flange. The limit baffles are continuously arranged from one end of the laminated wood to the other end. The limit baffles for fixing the saddle 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 gap between the first upper baffle and the first lower baffle. The gap H between the first upper baffle and the first lower baffle is 50mm. The movement of the laminated wood along the length direction of the ship can be limited by the first upper baffle and the first lower baffle, thereby limiting the movement of the C-type tank along the length direction of the ship.

[0035] 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. Reinforced brackets are symmetrically fixed on both sides of the web. The reinforced brackets are right-angled trapezoids. The right-angled sides of the reinforced brackets are welded to the web. The brackets are used to reinforce the web to meet the load transfer requirements. In this embodiment, the laminated wood width B1 is 300mm, the reinforced 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.

[0036] like Figure 3 As shown, 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. The upper laminated wood can slide along the stainless steel plate. The distance between each boundary of the stainless steel plate and the outer boundary of the lower laminated wood is 25mm. The stainless steel plate is used to reduce the friction resistance at the interface of the laminated wood, so as to facilitate the telescopic movement of the tank body along the length direction under temperature load. 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 reinforcing pad.

[0037] The width of the laminated wood of the fixed saddle is the same as that of the upper laminated wood of the movable saddle, which is 300 mm. In this embodiment, the shrinkage amount △L of the upper laminated wood along the lower laminated wood in the ship length direction obtained by temperature field analysis is 30 mm. Under normal temperature conditions, the distance D3 from the edge of the upper laminated wood to the edge of the lower laminated wood is 50 mm, and D4 is 20 mm, which can meet the telescopic movement requirements of the tank body along the ship length direction under temperature load.

[0038] like Figure 4As shown, 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 at 2 / 5 of the tank body diameter from the center line of the tank body. Figure 4 As shown, the anti-floating component includes an anti-floating frame and a steel groove. The steel groove is fixed on the edge of the upper surface of the transition flange. An anti-floating wooden block is placed in the steel groove. The anti-floating frame is arranged vertically. The bottom of the anti-floating frame is fixed on the hull structure. A pressure plate is protruded from the top and pressed on the anti-floating wooden block. In this embodiment, the distance between the steel groove and the edge of the transition flange is 25mm, the distance between the top of the anti-floating wooden block and the lower boundary of the top pressure plate is 10mm, the distance between the fixed saddle end anti-floating frame and the transition flange boundary is 50mm, and the distance between the movable saddle end anti-floating frame and the transition flange boundary is 80mm. Under the condition of ship flooding, the independent storage tank has a tendency to move upward under the action of buoyancy. The storage tank drives the transition flange to move upward through the saddle support structure, thereby driving the anti-floating wooden block to move upward. The anti-floating frame contacts the anti-floating wooden block to balance the buoyancy of the storage tank.

[0039] The width of the top pressure plate of the anti-floating frame is greater than the width of the anti-floating wood block, and the distance between the top pressure plate of the movable saddle and the boundary D5 of the anti-floating wood block in the ship length direction is not less than 2△L. In this embodiment, the distance between the top pressure plate of the anti-floating frame at the fixed saddle end and the boundary of the anti-floating wood block is 50mm, and the distance between the top pressure plate of the movable saddle end and the boundary of the anti-floating wood block is 100mm, which meets the requirements of the telescopic movement of the tank body along the ship length direction under temperature load.

[0040] The present invention provides an independent tank saddle with anti-floating function, which eliminates separately arranged anti-floating devices and hull reinforcement structures, balances the buoyancy of the tank under accidental water inflow conditions on the basis of satisfying the support for the tank body and liquid cargo load, optimizes the structural stress, and reduces the structural weight; the present invention designs the connection interface between the tank and the hull into a plane form, 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 in the tank construction stage, and improves the economy.

Claims

1. A C-type independent storage tank saddle with an anti-floating member, characterized in that: The C-type independent storage tank is placed on a saddle. The saddle near the bow end of the C-type 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 C-type tank. The reinforced pad fits the surface of the C-type tank. The transition flange is continuously arranged along the length direction of the reinforced pad below 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. Reinforced brackets are symmetrically fixed on both sides of the web. The reinforced bracket is a right-angle trapezoid, and the right-angle side of the reinforced bracket is welded to the web. Laminated wood is arranged between the transition flange and the hull structure, and limited baffles are fixed on both sides of the laminated wood. The limited baffles are arranged continuously from one end of the laminated wood to the other end, and the limited 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 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. 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 reinforcing pad. The movable saddle and the fixed saddle are each provided with two pairs of anti-floating components, which are symmetrically arranged at 1 / 3 of the tank body diameter to 1 / 2 of the tank body diameter away from the center line of the tank body. Each pair of anti-floating components is 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. 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 on the hull structure. A pressure plate is protruding from the top and pressed on the anti-floating wooden block.

2. A C-type independent 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 reinforced pad and the end of the reinforced bracket on the web is 100mm~200mm, and the distance D2 between the end of the transition flange and the end of the reinforced bracket is not less than 25mm; the wrap angle γ formed between the boundary of the reinforced pad and the boundary of the web is 2.5°~5°, and the length A of the reinforced pad within the range of γ is not less than 100mm.

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

4. A C-type independent 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. A C-type independent 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. A C-type independent tank saddle with an anti-floating member according to claim 1, characterized in that: The first upper baffle, the first lower baffle, the second upper baffle and the second lower baffle are bonded to the laminated wood.

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

8. A C-type independent 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, and there is a distance of 10mm~15mm between the anti-floating wooden block and the pressure plate.

9. A C-type independent 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. A C-type independent tank saddle with an anti-floating member according to claim 7, characterized in that: The width of the pressure plate on the top of the anti-floating frame is greater than the width of the anti-floating wooden block, and the distance between the pressure plate on the top of the movable saddle and the boundary D5 of the anti-floating wooden block in the direction of the ship's length is not less than 2△L.

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