Efficient installation method of LNG carrier cargo containment system compression piece

Abstract

The application discloses a high-efficiency installation method for a LNG transport ship cargo containment system compression piece, which utilizes joint actions of multiple electric push rods, combines a redesigned compression piece installation sequence and an installation method, and solves the following problems commonly existing in the compression piece installation, such as difficulty in disassembling and assembling a frame tool during traditional compression piece installation, non-standard assembly gap of a mechanical compression rod, damage of a thread of a bolt by a force sleeve, pollution of corrugated plate welding caused by hydraulic cylinder oil leakage, low efficiency of manual repeated push-pull compression rod adjustment stroke and the like. The method replaces the traditional installation method of fixing a frame tool and then applying pressure after the compression piece is installed, reduces the number of workers during the compression piece installation, reduces the operation process, improves the overall efficiency of the compression piece installation, realizes high-efficiency installation of the compression piece, effectively compresses the construction period of the LNG transport ship cargo containment system, and ensures smooth realization of the LNG transport ship node.

Description

Technical Field

[0001] This invention belongs to the field of marine shipbuilding and design, and specifically relates to an efficient installation method for the clamping components of the cargo containment system of an LNG carrier. Background Technology

[0002] LNG carriers employing the Mark III membrane-type cargo containment system technology form a secondary shielding layer after the installation of the internal insulation panels and roof bridge panels. The primary shielding layer inside the hold is made of 1.2mm thick 304L stainless steel corrugated plates. In the flat areas of the hold, the 1.2mm flat corrugated plates are continuously welded together by plasma automatic welding. In the corner areas of the hold, the 1.2mm corrugated plates are welded to 8mm steel corner pieces by manual argon arc welding. These corrugated plates welded to the corner areas of the hold are collectively referred to as clamping components. According to the angle, clamping components can be divided into 90° angle connectors and 135° angle connectors. Before welding the clamping component onto the 8mm steel corner, it must be ensured that both ends of the clamping component are in close contact with the boundary corrugated plate and the steel corner, respectively. Therefore, to ensure the assembly clearance of the clamping component, the LNG carrier industry currently uses mechanical pressure rods or hydraulic cylinders to squeeze the surface of the clamping component to make it in close contact with the boundary corrugated plate and the steel corner, thus ensuring the assembly clearance of the clamping component. However, the clamping component installation methods currently used in the cargo containment system field of the LNG carrier industry generally have many problems such as low clamping component installation efficiency, substandard assembly clearance, or hydraulic oil contamination of the work station.

[0003] The specific reasons are as follows: The number of clamping components in the cargo containment system of LNG carriers is enormous. Traditional assembly methods require using frame fixtures fixed to bolts on both sides of the clamping component, followed by the use of mechanical clamping rods or hydraulic cylinders to press the surface of the clamping component into close contact with the boundary corrugated plate and steel corner pieces. The mechanical clamping rods require manual tightening with wrenches and other tools to extend them, which is time-consuming and labor-intensive. Secondly, insufficient manual tightening with wrenches and other tools can lead to poor contact between the clamping components and the boundary corrugated plate and steel corner pieces, resulting in substandard assembly clearances and potential welding quality defects. Thirdly, it is difficult to control the tightening force on-site using extension sleeves; excessive tightening can damage the threads on the bolts on both sides of the clamping component, making disassembly of the mechanical clamping rod difficult. Fourthly, the use of wrenches and extension sleeves during operation can easily cause scratches and dents to the corrugated plate near the workstation, resulting in defective products and requiring corrugated plate repairs, further reducing the efficiency of clamping component installation and increasing material and labor costs. The traditional use of hydraulic cylinders has several disadvantages. First, the repeated extension and retraction of the cylinder weakens the sealing effect, and hydraulic oil dripping from the cylinder onto the corrugated plates near the work station causes welding contamination. This requires manual cleaning with specialized cleaning agents, reducing the efficiency of clamping component installation and increasing material and labor costs. Second, the hydraulic cylinder requires manual adjustment of the cylinder stroke by repeatedly pushing and pulling the lever, resulting in very low clamping component installation efficiency and consequently affecting the construction cycle of the entire LNG carrier cargo containment system.

[0004] This invention provides a method for the efficient installation of clamping components in the cargo containment system of LNG carriers. The invention redesigns the installation sequence, method, and supporting pressure-applying fixtures for the clamping components, solving common industry problems such as difficulties in disassembling and assembling frame fixtures, substandard mechanical pressure rod assembly clearances, damage to bolt threads by force-applying sleeves, hydraulic cylinder oil leakage causing corrugated plate welding contamination, and low efficiency of manual repeated pushing and pulling of pressure rods for stroke adjustment. This method redesigns the clamping component installation process by using multiple electrically controlled push rods in conjunction with each other, replacing the inefficient traditional method of applying pressure after fixing the clamping components with frame fixtures. This reduces the number of personnel required for clamping component installation, streamlines the workflow, and improves overall installation efficiency, achieving efficient installation of clamping components. This shortens the construction cycle of the LNG carrier cargo containment system, ensures the smooth completion of LNG carrier milestones, and increases the profits of shipbuilding companies in terms of both cost and efficiency. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an efficient installation method for clamping components in the cargo containment system of LNG carriers. This method aims to resolve issues such as difficulties in disassembling and assembling frame tooling during traditional clamping component installation, substandard mechanical clamping rod assembly clearance, damage to bolt threads by the force-applying sleeve, hydraulic cylinder oil leakage causing welding contamination of the corrugated plate, and low efficiency of manually adjusting the stroke by repeatedly pushing and pulling the clamping rod. The technical solution adopted is as follows:

[0006] A method for efficiently installing clamping components of a cargo containment system on an LNG carrier is provided, wherein steel corner pieces are provided in the corner area inside the hold, and corner pieces are installed between two steel corner pieces using tooling.

[0007] The fixture includes a transversely arranged beam with three electric actuators slidably connected to it. The middle actuator has a clamping component hinged to its head, while the two side actuators have corner connectors hinged to their heads. The clamping component has an L-shaped clamping plate that presses against the corner connector. The corner connector's main body is L-shaped, with its outer curvature matching the steel corner. A screw hole is located in the center of the flange of the L-shaped corner connector's main body.

[0008] The steel corner piece located in the corner area is L-shaped. Bolts are installed on the panel of the steel corner piece. The bolts pass through the screw holes on the wing plate of the corner piece connector and are fixed with nuts.

[0009] During installation, first connect and fix the corner connector to the steel corner with bolts. Then, press the clamping plate of the clamping member into the corner connector to hold it in place. Next, hinge the electric push rod to the corner connector and the clamping member. Place the three electric push rods on the crossbeam and operate them to make the electric push rods on both sides retract inward and the electric push rod in the middle extend outward, forcing the clamping member to squeeze the corner connector and tightly fit the corner connector to the steel corner. Weld the corner connector to the steel corner together along the edge of the corner connector.

[0010] Furthermore, in the above-mentioned efficient installation method for the clamping component of the cargo containment system of an LNG carrier, a reinforcing elbow plate is fixed between the two wing plates of the clamping component. The reinforcing elbow plate is square and has an eye plate, which is hinged to the end of the electric push rod.

[0011] Furthermore, in the above-mentioned efficient installation method for the clamping components of the cargo containment system of an LNG carrier, a connecting eye plate is provided between the two wing plates of the corner connector, which is hinged to the end of the electric push rod.

[0012] Furthermore, in the above-mentioned efficient installation method for the clamping components of the cargo containment system of an LNG carrier, a sliding sleeve is provided at the tail end of the electric push rod, and the sliding sleeve is fitted onto the crossbeam.

[0013] The above-mentioned efficient installation method for the cargo containment system clamping components of an LNG carrier is further described in the following specific steps:

[0014] S1: Use a grinder to grind the surface of the steel corner to be installed, clean the debris in the area to be welded on the steel corner surface, and ensure that the steel corner surface is clean and free of grinding dust, glue, and oil residue.

[0015] S2: Place the two corner connectors on top of the steel corner, pass the bolts through the screw holes of the corner connectors, and secure them with nuts.

[0016] S3: Connect the head connectors of the electric push rods on both sides to the corner connectors via pins and pins, and connect the head connector of the electric push rod in the middle to the clamping component via pins and pins. Place the three sliding sleeves on the crossbeam.

[0017] S4: The operator controls the electric push rod device, which retracts the electric push rods on both sides while extending the electric push rod in the middle.

[0018] S5: Observe the degree of compression of the clamping parts by the three electric push rods. When the corner connector to be installed is in close contact with the boundary corrugated plate and the steel corner, and the gap at the corner position of the corner connector to be installed is ≤0.3mm, operate the electric push rod device to stop the extension and retraction action.

[0019] S6: Check the gaps around the edges of the corner connector to be installed. If there are gaps ≥0.3mm around the edges, use a hammer and chisel to tap and repair the gaps to ≤0.3mm to meet the requirements for subsequent welding.

[0020] S7: Use argon arc welding to start wide-gap tack welding from the corner of the corner connector, and ensure that the interval between adjacent wide-gap tack welds is 50mm.

[0021] S8: Use argon arc welding to complete the narrow gap tack welding of the corner connector. The interval of the narrow gap tack welding is 10-15mm. If there is a gap of ≥0.3mm after the narrow gap tack welding, adjust the interval of the narrow gap tack welding to 5mm.

[0022] S9: Adjust the parameters of the argon arc welding machine according to the requirements of the Welding Procedure Specification (WPS) and perform continuous welding on the folded area and edge of the corner connector.

[0023] S10: After the corner connector is welded, the operator uses an electric actuator to retract the middle electric actuator and remove the fixture.

[0024] S11: Place the fixture on the next steel corner surface to be installed, and repeat steps S4 to S10 to complete the installation of the diagonal connector.

[0025] Furthermore, in step S7, the wide-gap tack welding sequence of the aforementioned efficient installation method for the clamping components of the LNG carrier cargo containment system is as follows: the contact position between the corner connector and the steel corner bead, the contact position between the corner connector and the boundary corrugated plate, and the other edge positions around the corner connector.

[0026] Furthermore, the aforementioned efficient installation method for the clamping components of the cargo containment system of an LNG carrier further includes corner connectors comprising 90° corner connectors and 135° corner connectors.

[0027] The beneficial effects of this invention are:

[0028] 1. This invention changes the traditional method of using nuts to fix the frame fixture to the bolts on both sides of the clamping component before assembly. Instead, the nuts are pre-fabricated on the bolts on both sides of the clamping component, and corner connectors are used to attach to the bolts with nuts. This replaces the industry practice of using nuts to lock the frame fixture to the bolts on both sides of the clamping component. On the one hand, it reduces the time spent on manual installation of the frame fixture and improves the installation efficiency of the clamping component. On the other hand, this invention eliminates the need to repeatedly disassemble and reassemble the nuts fixing the frame fixture, reducing the damage to the threads on the bolts on both sides of the clamping component caused by frequent nut disassembly and reassembly, and improving the construction quality of the cargo containment system for LNG carriers.

[0029] 2. This invention uses an electric push rod to replace the traditional method of using mechanical pressure rods or hydraulic cylinders to compress and clamp the surface of the component, ensuring tight contact between it and the boundary corrugated plate and steel corners. The electric push rod solves the problem of time-consuming and labor-intensive manual tightening of mechanical pressure rods using wrenches and other tools to extend them. It also solves the problem of insufficient clamping force from mechanical pressure rods leading to substandard assembly clearances. Furthermore, the electric push rod avoids the problem of corrugated plates being bumped and scratched near the workstation due to the need for secondary force application from mechanical pressure rods. In addition, the electric push rod avoids the problem of hydraulic oil leakage and contamination of the corrugated plate when using hydraulic cylinders.

[0030] 3. This invention uses multiple electric actuators working in tandem to replace the traditional method of directly fixing the frame fixture to the bolts on both sides of the clamping component. By electrically controlling the two electric actuators fixed to the bolts on both sides of the clamping component to retract synchronously, and simultaneously electrically controlling the electric actuators that squeeze the surface of the clamping component to extend, the time for the clamping component to reach the assembly gap with the boundary corrugated plate and steel corner can be quickly reduced. In addition, the electric actuators can be individually controlled to extend and retract on the side with the straightness deviation of the corrugations on both sides of the clamping component, thereby accurately controlling the assembly gap on the side of the clamping component with the straightness deviation.

[0031] 4. The multiple electric push rods of this invention can slide freely on the crossbeam, and the crossbeam span can be freely selected according to the work station length. Thus, it only needs to be fixed once on the bolts on both sides of the clamping component. Up to one corner area of ​​the cabin can be installed, breaking the constraint that the fixed span of the traditional frame tooling can only install a fixed number of clamping components in one corner area. This greatly improves the assembly efficiency of the clamping components, thereby realizing the efficient installation of the clamping components of the cargo containment system of LNG carriers. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a 90° angle connector structure;

[0033] Figure 2 This is a schematic diagram of the steel corner structure at the corner area;

[0034] Figure 3 This is a schematic diagram of a 90° angle connector located between two steel corner pieces;

[0035] Figure 4 This is a schematic diagram of a corner connector;

[0036] Figure 5 This is a schematic diagram of the clamping component structure;

[0037] Figure 6 This is a schematic diagram of the equipment and tooling assembly involved in the efficient installation of clamping components;

[0038] Among them, 1-boundary corrugated plate, 2-steel corner, 3-crossbeam, 4-electric push rod, 5-clamping part, 6-corner connector, 7-screw hole, 8-bolt, 9-eye plate, 10-connecting eye plate, 11-sliding sleeve. Detailed Implementation

[0039] The present invention will be described in detail with reference to specific embodiments.

[0040] A method for efficiently installing a clamping component 5 in the cargo containment system of an LNG carrier includes steel corner brackets 2 in the corner area inside the hold. A corner connector is installed between two steel corner brackets 2 using tooling. The corner connector includes a 90° angle connector (such as...). Figure 1 (As shown) and 135° angle connector. In this embodiment, the corner connector is described using a 90° angle connector, and the installation method of the 135° angle connector is the same as that of the 90° angle connector.

[0041] The fixture used for installation includes a horizontally arranged beam 3, on which three electric push rods 4 are slidably connected. The head of the middle electric push rod 4 is hinged to a clamping element 5. Figure 5 As shown, the electric push rods 4 on both sides are hinged at their heads with corner connectors 6, such as... Figure 4As shown, the clamping member 5 has an L-shaped clamping plate that presses against the corner connector. The corner connector 6 is L-shaped, and its outer curvature matches that of the steel corner 2. The center of the wing plate of the L-shaped corner connector 6 has a screw hole 7.

[0042] like Figure 2 As shown, bolts 8 are fixed on the panel of the steel corner 2, and bolts 8 are connected to screw holes 7 on the wing plate of the corner connector 6.

[0043] The specific steps are as follows:

[0044] S1: Use a grinder to grind the surface of the steel corner 2 where the 90° angle connector is to be installed, and clean the debris in the welding area of ​​the steel corner 2 surface that is in contact with the 90° angle connector by grinding.

[0045] Use a dedicated vacuum cleaner for steel corner 2 to vacuum the surface of the polished steel corner 2 to ensure that there is no polishing dust residue left on the surface of the steel corner 2.

[0046] Wipe the surface of the polished steel corner 2 with alcohol to ensure that the surface of the steel corner 2 is free of glue and oil and meets the requirements for welding 90° angle connectors.

[0047] Based on the number of 90° angle connectors to be installed in any corner area and their distribution on the steel corner 2, assemble matching nuts on the bolts 8 of the steel corner 2 on both sides of the 90° angle connectors to be installed, and screw the nuts in so that the height of the bottom surface of the nut is 1-3 mm higher than the thickness of the corner connector 6.

[0048] S2: Place the two corner connectors 6 above the steel corner 2 with bolts 8 respectively. The bolts 8 pass through the screw holes 7 on the wing plate of the corner connector 6 and are fixed with nuts.

[0049] S3: Connect the heads of the two electric push rods 4 to the connecting eye plate 10 on the corner connector 6 via pins and clips.

[0050] Select a suitable length of connecting beam 3 based on the distance between the two corner connectors 6, and pre-fit the three sliding sleeves 11 onto the beam 3. The tail ends of the two electric push rods 4 are hinged to the sliding sleeves 11 on both sides via pins and pins.

[0051] According to the installation drawings for corner connectors, select the specified model of 90° corner connector and place it at the installation position between the boundary corrugated plate 1 and the steel corner 2. Figure 3 As shown.

[0052] Place the clamping element 5 on the surface of the 90° angle connector, and ensure that the center of the clamping element 5 is aligned with the center of the 90° angle connector.

[0053] The head of the third electric push rod 4 is connected to the eye plate 9 on the clamping part 5 via a pin and a safety pin, and its tail is connected to the sliding sleeve 11 sleeved in the middle of the crossbeam 3 via a pin and a safety pin.

[0054] S4: The electric actuator 4, which is electrically controlled by the operator, retracts back when connected to the corner connector 6, while simultaneously extending outward when connected to the 90° corner connector.

[0055] S5: Observe the degree of compression of the three electric push rods 4 against the 90° angle connectors. When the 90° angle connectors are in close contact with the boundary corrugated plate 1 and the steel corner 2, and the gap at the corner position of the 90° angle connectors is ≤0.3mm, control the electric push rods 4 to stop the telescopic action.

[0056] S6: Check the gaps around the edges of the 90° angle connector. If there are gaps ≥0.3mm around the edges, use a hammer and chisel to tap and repair the gaps to ≤0.3mm to meet the requirements for subsequent welding.

[0057] S7: Use argon arc welding to start wide gap tack welding from the corner position of the 90° angle connector. The interval between adjacent wide gap tack welds should be 50mm. The wide gap tack welding sequence is: the contact position between the corner and the steel corner 2, the contact position between the 90° angle connector and the boundary corrugated plate 1, and the other edge positions around the 90° angle connector.

[0058] S8: Use argon arc welding to complete the narrow gap tack welding of 90° angle connectors. The interval of the narrow gap tack welding is 10-15mm. If there is a gap ≥0.3mm after the narrow gap tack welding, adjust the interval of the narrow gap tack welding at the gap ≥0.3mm position to 5mm.

[0059] S9: Adjust the parameters of the argon arc welding machine according to the requirements of the Welding Procedure Specification (WPS) to continuously weld the folded edge area of ​​the 90° angle connector.

[0060] Adjust the parameters of the argon arc welding machine according to the requirements of the Welding Procedure Specification (WPS) to complete the continuous welding of the four edges of the 90° angle connector.

[0061] S10: The operator uses the electric actuator 4 to retract the electric actuator 4 connected to the 90° angle connector pressure fixture, and removes the 90° angle connector pressure fixture.

[0062] S11: Place the 90° angle connector pressure fixture on the surface of the next 90° angle connector to be installed, and ensure that the center of the clamping part 5 is aligned with the center of the 90° angle connector. Repeat steps S4 to S10 to complete the installation of all 90° angle connectors in the corresponding corner area.

[0063] Remove the sliding sleeve 11, three electric push rods 4, corner connector 6, clamping piece 5.

[0064] Through the above detailed technical solutions, this invention enables the efficient installation of the clamping components 5 in the cargo containment system of LNG carriers. Compared to the traditional industry method of assembling clamping components 5, which uses rigid spacer frame fixtures to fix them to the bolts 8 on both sides of the clamping component 5, and then uses mechanical pressure rods or hydraulic cylinders to squeeze the surface of the clamping component 5 to make it in close contact with the boundary corrugated plate 1 and the steel corner 2, this invention innovatively designs corner connectors 6 that are easy to disassemble and assemble. By utilizing the positional relationship between the corner bolts 8 and the matching nuts and the steel corner 2, a quick insertion and removal space is constructed, reducing the damage to the threads on the bolts 8 on both sides of the clamping component 5 caused by the frequent disassembly and assembly of nuts in the traditional method. The innovative design of the crossbeam 3, which is not constrained by the number of 90° angle connectors to be installed or their distribution in the steel corner 2, allows for the installation of all clamping components 5 in any corner area of ​​the hold in one go, with the bolts 8 on both sides of the clamping component 5 being fixed at one time. The innovative design of the sliding sleeve 11 and the The arbitrary distance of the crossbeams 3 allows for the installation of clamping components 5 at any position. Furthermore, by increasing the number of corner connectors 6, multiple clamping components 5 can be installed simultaneously at multiple workstations, significantly improving the installation efficiency of clamping components 5 in the LNG carrier cargo containment system. The innovative design of three electric push rods 4 operating synchronously greatly reduces the time required for the clamping component 5 to reach the assembly gap with the boundary corrugated plate 1 and the steel corner 2. Additionally, the electric push rods 4 can be independently extended and retracted on the side with the straightness deviation of the corrugations on both sides of the clamping component 5, thus precisely controlling the assembly gap on that side. The innovative use of electric push rods 4 to replace traditional mechanical pressure rods or hydraulic cylinders solves common industry problems in clamping component 5 installation, such as substandard assembly gaps with mechanical pressure rods, damage to the threads of bolts 8 by the force-applying sleeve, oil leakage from hydraulic cylinders causing welding contamination of the corrugated plate, and low efficiency of manually pushing and pulling pressure rods to adjust the stroke.

Claims

1. A method for efficient installation of a LNG carrier cargo containment system compression piece, characterized in that, The corner area in the cabin is provided with a steel corner, and the corner connecting piece is installed between the two steel corners through a tool; The tool comprises a transversely arranged cross beam, three electric push rods are slidably connected to the cross beam, a pressing piece is hingedly connected to the head of the middle electric push rod, corner connecting pieces are hingedly connected to the heads of the two side electric push rods, the pressing piece is provided with an L-shaped pressing plate, the pressing plate is pressed on the corner connecting piece, the corner connecting piece has an L-shaped main body, the outer curvature of the main body is matched with the steel corner, and a screw hole is formed in the center of the wing plate of the L-shaped main body; The steel corner located at the corner area has an L shape, and a bolt is arranged on the surface plate of the steel corner, the bolt is matched with a nut to be fixed through the screw hole in the wing plate of the corner connecting piece; During installation, the corner connecting piece is fixedly connected with the steel corner through the bolt, the pressing plate of the pressing piece is pressed into the corner connecting piece and abuts against the corner connecting piece, and then the electric push rods are hingedly connected with the corner connecting pieces and the pressing piece; the three electric push rods are sleeved on the cross beam, the three electric push rods are operated, the two side electric push rods are inwardly retracted, the middle electric push rod is outwardly expanded, the pressing piece is forced to press the corner connecting piece, the corner connecting piece is tightly attached to the steel corner, the corner connecting piece is welded with the steel corner along the edge of the corner connecting piece, and the specific installation process is as follows: S1: use a grinder to polish the surface of the steel corner to be installed, clean the welding area of the steel corner, and ensure that the surface of the steel corner is clean, free of polishing dust, glue and oil residues; S2: place the two corner connecting pieces above the steel corner, pass the bolts through the screw holes of the corner connecting pieces, and fix the corner connecting pieces by using nuts; S3: connect the head joints of the two side electric push rods with the corner connecting pieces through a pin shaft and a pin, connect the head joint of the middle electric push rod with the pressing piece through a pin shaft and a pin, and sleeve the three sliding sleeves on the cross beam; S4: operate the electric push rod device to retract the middle electric push rod while making the two side electric push rods retract; S5: observe the pressing degree of the three electric push rods on the pressing piece, when the corner connecting piece to be installed is tightly attached to the boundary corrugated plate and the steel corner, and the gap between the corner positions of the corner connecting piece to be installed is less than or equal to 0.3 mm, stop the extension and retraction of the electric push rod device; S6: check the gap of the edge of the corner connecting piece to be installed, if the gap of the edge of the corner connecting piece to be installed is greater than or equal to 0.3 mm, use a hammer and a chisel to knock the position with the gap greater than or equal to 0.3 mm to make the gap less than or equal to 0.3 mm to meet the subsequent welding requirements; S7: use argon arc welding to perform wide gap positioning welding from the corner position of the corner connecting piece, and the interval between adjacent wide gap positioning weldings is ensured to be 50 mm; S8: use argon arc welding to complete narrow gap positioning welding of the corner connecting piece, the interval between the narrow gap positioning weldings is 10-15 mm, if the gap after the narrow gap positioning welding is greater than or equal to 0.3 mm, adjust the interval between the narrow gap positioning weldings to 5 mm; S9: adjust the parameters of the argon arc welding machine according to the welding procedure specification WPS, and continuously weld the edge area and the edge of the corner connecting piece; S10: after the corner connecting piece is welded, the middle electric push rod is retracted by operating the electric push rod device, and the tool is removed. S11: The tool is placed on the next steel corner surface to be installed, and steps S4-S10 are repeated to complete the installation of the corner connecting piece.

2. The LNG carrier containment system compression member efficient installation method of claim 1, wherein, The two wing plates of the pressing part are fixed with a reinforcing elbow plate in the middle, the reinforcing elbow plate is square, and an eye plate is arranged on the reinforcing elbow plate and is hinged with the end of the electric push rod.

3. The LNG carrier containment system compression member efficient installation method of claim 1, wherein, The two wing plates of the corner connecting piece are provided with a connecting eye plate in the middle, and the connecting eye plate is hinged with the end of the electric push rod.

4. The LNG carrier containment system compression member efficient installation method of claim 1, wherein, The tail end of the electric push rod is provided with a sliding sleeve, and the sliding sleeve is sleeved on the cross beam.

5. The LNG carrier containment system compression member efficient installation method of claim 1, wherein, In step S7, the wide gap positioning welding sequence is the contact position of the corner connecting piece corner and the steel corner, the contact position of the corner connecting piece and the boundary corrugated plate, and other edge positions around the corner connecting piece.

6. The LNG carrier containment system compression member efficient installation method of claim 1, wherein, The corner connecting piece includes a 90° corner connecting piece and a 135° corner connecting piece.

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