A giant cover structure and support components for VLEC gas carriers

Abstract

This utility model relates to the field of shipbuilding and provides a giant cover plate structure and support assembly for VLEC gas carriers. The cover plate structure includes a cover plate section and a support section. The support assembly includes ground supports that cooperate with the two support sections respectively and support frames that cooperate with the cover plate section. By placing a pair of channel steels on the ground in the construction area and fixing the pair of channel steels with flat steel, the stability and accuracy of the support are ensured. The pair of channel steels clamp the two bottom sides of the support section of the cover plate structure to achieve positioning and limitation, preventing deformation during placement. Two rows of symmetrical support frames support the cover plate section of the cover plate structure, preventing deformation of the pot-shaped cover plate structure during placement, ensuring the precision control of the giant section. The ground supports and support frames can be reused, saving construction costs.

Description

Technical Field

[0001] This utility model relates to the field of shipbuilding, specifically to a giant cover plate structure and support components for a VLEC gas carrier. Background Technology

[0002] VLEC gas carriers are used to transport various liquefied gases such as ethane, ethylene, and LPG. They offer advantages such as low energy consumption, low evaporation rate, no liquid level loading restrictions, and low maintenance costs, making them the optimal vessel type for long-distance ethane transport. However, because this vessel type is for gas transport, the cargo hold opening is sealed with a cover plate. The cover plate section has a pot-lid structure, with a width of 36.5 meters, a length of 31 meters, and a height of 9.2 meters. Deformation is prone to occur during the assembly, transport, placement, and hoisting of the cover plate sections, affecting accuracy. Existing construction site embedded parts are of a conventional type, only suitable for the assembly and placement requirements of container ships and bulk carriers. They are not suitable for the construction conditions of assembling the large cover plate sections of gas carriers, and cannot meet the requirements for precision control during the assembly, transport, placement, and hoisting processes. Summary of the Invention

[0003] To ensure that the giant cover plate of the VLEC gas carrier does not deform during the segment assembly, transportation, placement, and hoisting process, and to achieve precise control, this utility model provides a giant cover plate structure and support components for the VLEC gas carrier.

[0004] The technical solution adopted by this utility model is as follows: a giant cover plate structure and support assembly for a VLEC gas carrier. The cover plate structure includes a cover plate part and a support part. The support assembly includes ground supports that cooperate with the two support parts respectively and a support frame that cooperates with the cover plate part. The ground supports include two parallel channel steels, the length of which corresponds to the length of the support part. Multiple evenly distributed flat steels are welded and installed between the two channel steels along their length direction. The flat steels are fixed to the ground. The inner sides of the two vertical surfaces of the channel steels respectively limit the two sides of the support part in the width direction. The support frame is a rectangular frame composed of welded round tubes. A support column is welded to the center of the top surface of the support frame. The support column supports the bottom surface of the cover plate part. Two rows of support frames are arranged below the cover plate part along the length direction of the cover plate. The two rows of support frames are symmetrically distributed along the center surface of the cover plate length direction.

[0005] Furthermore, the cover plate includes a horizontal section and inclined sections symmetrically distributed on both sides of the horizontal section. The cover plate consists of an outer steel plate, vertical support plates evenly distributed along the length of the bottom of the outer steel plate, and T-shaped plates evenly distributed along the width of the outer steel plate. The vertical support plates are provided with T-shaped grooves corresponding to the cross-section of the T-shaped plates. The T-shaped plates are simultaneously welded to the outer steel plate and the vertical support plates.

[0006] Furthermore, the support portion includes a cavity formed by a top plate, a bottom plate, and side plates on both sides. The side plate near the cover plate includes a vertical surface and an inclined surface parallel to the inclined portion of the cover plate. Support plates are evenly spaced along the length of the cavity. The edges of the support plates are welded to the corresponding inner surfaces of the cavity. T-shaped plates are welded to the inner surfaces of the top plate, the bottom plate, and the side plates on both sides. The T-shaped plates are fitted with and welded to the T-grooves at the edges of the support plates.

[0007] Furthermore, a pad is installed inside the channel steel, and the pad supports the bottom surface of the support plate of the support part.

[0008] Furthermore, a row of auxiliary support rods is provided on one side of the channel steel near the cover plate. The bottom of the auxiliary support rods is fixed to the ground, and a support plate is welded to the top of the auxiliary support rods. The support plate supports the inclined surface of the side plate of the support part.

[0009] Furthermore, the support plate is provided with passage holes.

[0010] Furthermore, the flat steel is fixed to the ground by steel nails or welded to the ground embedded parts.

[0011] After adopting the above technical solution, the beneficial effects of this utility model are as follows: By placing a pair of channel steels on the ground in the construction area and fixing the pair of channel steels with flat steel, the stability and accuracy of the support are ensured. The pair of channel steels clamp the bottom two sides of the support part of the cover plate structure to achieve positioning and limitation, avoiding deformation during placement. Two rows of symmetrical support frames support the cover plate part of the cover plate structure, preventing the pot lid-shaped cover plate structure from deforming during placement. At the same time, two rows of auxiliary supports support the inner slope of the support part of the cover plate structure, achieving full support and precision control of the cover plate structure, ensuring the precision control of the giant section. The ground support and support frame can be reused, saving construction costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the segmented structure of the cover plate.

[0013] Figure 2 This is a sectional view of the cover plate structure.

[0014] Figure 3 This is a schematic diagram of the support structure for the cover plate.

[0015] Figure 4 This is a schematic diagram of the structure supported by the ground.

[0016] In the diagram: 1. Cover plate, 11. Outer steel plate, 12. Inclined part, 13. Vertical support plate, 14. T-shaped plate, 2. Support part, 21. Top plate, 22. Bottom plate, 23. Outer plate, 24. Side plate, 25. Inclined surface, 26. T-shaped plate, 27. Positioning plate, 28. Support plate, 3. Ground support, 31. Channel steel, 32. Flat steel, 33. Pad, 4. Support frame, 41. Rectangular frame, 42. Support column, 5. Auxiliary support rod, 6. Support plate. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings: like Figure 1-4 As shown, a giant cover plate structure and support components for a VLEC gas carrier are disclosed. The cover plate structure is installed at the hatch of the gas carrier to seal the gas tanks inside the tank. The support components are prefabricated structures used to support the cover plate structure and control its dimensional accuracy during the processing, hoisting and other stages.

[0018] The cover plate structure is shaped like an inverted pot lid, with a raised cover plate section 1 in the middle and support sections 2 on all four sides to fit with the hatch and deck. The middle of the cover plate section 1 is flat, and the four sides slope downwards to transition to the support sections.

[0019] The cover plate section 1 includes a horizontal section and an inclined section transitioning from the horizontal section to the deck. The cover plate section includes an outer steel plate 11, the four sides of which are bent downward to form inclined sections 12. Multiple vertical support plates 13 are evenly distributed along the length of the bottom of the outer steel plate 11. The vertical support plates 13 correspond to the cross-section of the cover plate section and are welded to the bottom of the outer steel plate 11 and the inner surface of the inclined section 12. To increase the stability of the welding, multiple T-shaped plates 14 are evenly welded along the width of the outer steel plate. The vertical support plates 13 are provided with T-shaped grooves corresponding to the cross-section of the T-shaped plates 14. The T-shaped plates 14 are simultaneously welded to the outer steel plate 11 and the vertical support plates 13.

[0020] The support section 2 includes a cavity formed by a top plate 21, a bottom plate 22, an outer side plate 23, and an inner side plate 24. The top plate 21 and the bottom plate 22 are horizontally arranged, and the outer side plate 23 is vertically arranged. The inner side plate 24 near the cover plate includes a vertical surface and an inclined surface 25 that is parallel to and coplanar with the inclined portion 12 of the cover plate. Support plates 25 are evenly spaced along the length of the cavity. The edges of the support plates 25 are welded to the corresponding inner surfaces of the cavity. The support plates 25 are provided with passage holes to facilitate personnel passage within the cavity. T-shaped plates 26 are welded to the inner surfaces of the top plate, the bottom plate, and the two side plates. The T-shaped plates 26 are fitted with and welded to the T-grooves at the edges of the support plates 25.

[0021] The two side plates 23 extend downwards to form positioning plates 27, and the support plate 25 extends downwards to form a support plate 28. The positioning plates 27 and the support plates 28 are used to cooperate with the support assembly.

[0022] The support assembly includes ground supports 3 that cooperate with each support section and support frames 4 that cooperate with the cover plate section. The ground supports 3 include two parallel channel steels 31, the length of which corresponds to the length of the support section. Multiple evenly distributed flat steels 32 are welded and installed between the two channel steels 31 along their length, the positions of which correspond to the positions of the support plate 25. The welded joints of the flat steels 32 and the channel steels are fixed to the ground with steel nails or welded to embedded parts in the ground. A pair of positioning plates 27 below the bottom plate of the support section 2 are inserted between the two vertical surfaces of the channel steels 31 to form positioning and limiting. Pads 33 are installed inside the channel steels 31, supporting the support plate 28 extending below the bottom plate from the support plate 25.

[0023] The support frame 4 is a rectangular frame 41 composed of welded round tubes, including four vertical support rods, horizontal bars between the four vertical support rods, and cross diagonal bracing. A support column 42 is welded to the center of the top surface of the support frame 4, and the support column 42 supports the bottom surface of the cover plate 1. Two rows of support frames 4 are arranged along the length of the cover plate below the cover plate 1. The two rows of support frames 4 are symmetrically distributed along the center surface of the cover plate 1 to ensure the accuracy of the middle part of the giant cover plate section and the overall stability and safety of the section.

[0024] A row of auxiliary support rods 5 is provided on one side of each channel steel 31 near the cover plate. The bottom of the auxiliary support rods 5 is fixed to the ground, and the top of the auxiliary support rods 5 is welded with a support plate 6. The support plate 6 supports the inclined surface 25 of the side plate of the corresponding support part 2. This prevents the support part from deforming due to center offset.

[0025] The support components provide sufficient positioning and limiting during the assembly, transportation, placement, and hoisting of the cover plate structure segments, ensuring construction accuracy.

Claims

1. A giant cover plate structure and support assembly for a VLEC gas carrier, characterized in that, The cover plate structure includes a cover plate portion and a support portion. The support assembly includes ground supports that cooperate with the two support portions and a support frame that cooperates with the cover plate portion. The ground supports include two parallel channel steels, the length of which corresponds to the length of the support portion. Multiple evenly distributed flat steels are welded and installed between the two channel steels along their length direction. The flat steels are fixed to the ground. The inner sides of the two vertical surfaces of the channel steels respectively limit the movement of the two sides of the support portion in the width direction. The support frame is a rectangular frame composed of welded round tubes. A support column is welded to the center of the top surface of the support frame, and the support column supports the bottom surface of the cover plate portion. Below the cover plate portion, two rows of support frames are arranged along the length direction of the cover plate, and the two rows of support frames are symmetrically distributed along the center surfaces of the cover plate length direction.

2. The giant cover plate structure and support assembly for a VLEC gas carrier according to claim 1, characterized in that, The cover plate includes a horizontal section and inclined sections symmetrically distributed on both sides of the horizontal section. The cover plate consists of an outer steel plate, vertical support plates evenly distributed along the length of the bottom of the outer steel plate, and T-shaped plates evenly distributed along the width of the outer steel plate. The vertical support plates are provided with T-shaped grooves corresponding to the cross-section of the T-shaped plates. The T-shaped plates are welded to both the outer steel plate and the vertical support plates.

3. The giant cover plate structure and support assembly for a VLEC gas carrier according to claim 1, characterized in that, The support part includes a cavity formed by a top plate, a bottom plate, and side plates on both sides. The side plate near the cover plate includes a vertical surface and an inclined surface parallel to the inclined part of the cover plate. Support plates are evenly spaced along the length of the cavity. The edges of the support plates are welded to the corresponding inner surfaces of the cavity. T-shaped plates are welded to the inner surfaces of the top plate, the bottom plate, and the side plates on both sides. The T-shaped plates are fitted with the T-grooves at the edges of the support plates and welded to fix them.

4. The giant cover plate structure and support assembly for a VLEC gas carrier according to claim 3, characterized in that, A pad is installed inside the channel steel, and the pad supports the bottom surface of the support plate of the support part.

5. The giant cover plate structure and support assembly for a VLEC gas carrier according to claim 3, characterized in that, A row of auxiliary support rods is provided on one side of the channel steel near the cover plate. The bottom of the auxiliary support rods is fixed to the ground, and a support plate is welded to the top of the auxiliary support rods. The support plate supports the inclined surface of the side plate of the support part.

6. The giant cover plate structure and support assembly for a VLEC gas carrier according to claim 3, characterized in that, The support plate is provided with passage holes.

7. The giant cover plate structure and support assembly for a VLEC gas carrier according to claim 1, characterized in that, The flat steel is fixed to the ground by steel nails or welded to the ground embedded parts.

Images