Leakage guide channel based fixed type b-type cabin heat insulation system and construction method thereof

Abstract

A fixed type B cabin heat insulation system based on a leakage guide channel and a construction method thereof, which has prefabricated insulation plates, the shapes of the prefabricated insulation plates are different according to the positions of the installed areas, the prefabricated insulation plate installed at the plane of the cabin wall of the B cabin is a plane insulation plate, the prefabricated insulation plate installed at the intersection of two surfaces of the B cabin is a two-surface corner area insulation plate, and the prefabricated insulation plate installed at the intersection of three surfaces of the B cabin is a three-surface corner area insulation plate; during installation, the plane insulation plate is installed first, then the two-surface corner area insulation plate is installed after the installation of the plane insulation plate, and finally the three-surface corner area insulation plate is installed. The guide channel groove of the insulation plate is cooperatively designed with the leakage guide channel, so that the insulation plate can be conveniently divided into the specified position during installation, the installation operation is simple, the stud welding work of a large area is reduced, and the material cost of the insulation system such as studs and cushion blocks is reduced.

Description

Technical Field

[0001] This invention belongs to the field of B-type cabin design, specifically relating to a fixed B-type cabin insulation system based on a leakage diversion channel and its construction method. Background Technology

[0002] With the growth of global energy demand and the booming development of the energy transportation industry, the need for efficient and safe liquid cargo transportation equipment is becoming increasingly urgent. In the field of liquid cargo transportation, Type B tanks, as a key liquid cargo storage and transportation container, directly affect the transportation safety, energy loss, and transportation costs of liquid cargo through the performance of their insulation systems. A good insulation system can effectively reduce heat exchange between the liquid cargo and the external environment, prevent temperature fluctuations in the liquid cargo, and ensure the quality and stability of the liquid cargo.

[0003] Currently, traditional Type B cabin insulation systems mostly employ panel-type insulation structures. This structure has revealed several shortcomings in practical applications:

[0004] First, traditional plate insulation requires welding a large number of studs to the outer surface of the cargo tank to secure the insulation plates. Welding a large number of studs is an extremely tedious and time-consuming process, requiring not only skilled welders but also strict quality control over the welding of each stud. A weak weld on any single stud can affect the stability of the entire insulation system. This significantly extends the construction period, increasing both the project's time and labor costs.

[0005] Secondly, during liquid cargo transportation, Type B tanks are subject to various environmental factors, among which thermal expansion and contraction is unavoidable. Because the insulating plate, secured by studs, is tightly connected to the outer surface of the cargo tank, significant localized stress is generated at the contact point between the insulating plate and the studs when the cargo tank expands and contracts due to temperature changes. Under long-term cycles of thermal expansion and contraction, this localized stress can easily lead to cracking and detachment of the insulating plate, thereby reducing the performance of the insulation system. In severe cases, it may even affect the structural integrity of the cargo tank, posing a safety hazard.

[0006] Secondly, the primer on the cargo hold surface needs to be sanded at each stud welding point, and repairs are required after welding. This process is not only complicated, but each sanding and welding operation may damage the paint in the corresponding position inside the hold, affecting the anti-corrosion performance of the hold.

[0007] In addition to the welding work for fixing the insulation board, some designs require additional leakage diversion channels to be fixed separately under the insulation board. This undoubtedly further increases the complexity and workload of construction, and makes the entire system structure more complex, which is not conducive to later maintenance and repair. Moreover, excessive welding work also brings more risks, thereby affecting the stability of the entire insulation system.

[0008] In summary, existing traditional plate-type insulation systems for Type B tanks suffer from problems such as long construction periods, high localized stress during thermal expansion and contraction, and severe primer damage, making them unable to meet the current demands of the liquid cargo transportation industry for efficient, safe, and low-cost transportation. Therefore, developing a novel fixed Type B tank insulation system based on leakage diversion channels is of significant practical importance and is urgently needed. Summary of the Invention

[0009] To address the above problems, this invention proposes a fixed Type B cabin insulation system based on a leakage diversion channel and its construction method. The aim is to reduce the amount of welding required in the insulation system, lower construction risks and workload, while achieving rapid and precise installation. The technical solution adopted is as follows:

[0010] A fixed B-type compartment insulation system based on a leakage diversion channel and its construction method are disclosed. The system includes prefabricated insulation panels. The shape of the prefabricated insulation panels varies depending on the installation location. Prefabricated insulation panels installed on the flat surfaces of the B-type compartment walls are planar insulation panels. Prefabricated insulation panels installed at the intersection of two surfaces of the B-type compartment are bifacial corner insulation panels, with the curvature matching the curvature formed by the intersection of the two surfaces. Prefabricated insulation panels installed at the intersection of three surfaces of the B-type compartment are trifacial corner insulation panels, with the curvature matching the curvature formed by the intersection of the three surfaces.

[0011] The planar insulation board, the two-sided corner area insulation board, and the three-sided corner area insulation board are all composed of a main insulation layer and a secondary insulation layer. The main insulation layer and the secondary insulation layer are stacked in a staggered manner and bonded together with low-temperature resistant adhesive. A corrugated aluminum foil is bonded to the outer surface of the main insulation layer, and a splash-proof layer is bonded to the outer surface of the secondary insulation layer. Fixing holes are provided on the edges of the secondary insulation layer that are not connected to the main insulation layer.

[0012] The outer surface of the Type B cabin is equipped with a transverse leakage guide channel parallel to the horizontal plane and a longitudinal leakage guide channel perpendicular to the horizontal plane. The longitudinal leakage guide channel is located on the longitudinal centerline of the cabin surface, and the cross-section of the transverse leakage guide channel is dovetail-shaped.

[0013] The planar insulating plate has a main shield and a secondary shield that are both square. The secondary shield has multiple dovetail grooves below it. The multiple dovetail grooves are parallel to the diagonal of the square. The two ends of the dovetail grooves are located at the edges of the planar insulating plate and are open. The dovetail grooves cooperate with the transverse leakage guide channels and can slide on the adjacent transverse guide channels.

[0014] During installation, first install the flat insulating board. On the protruding side of the secondary insulation layer of the insulating board to be installed, first adhere the glass wool block to it. After the insulating board to be installed is in the designated installation position, the glass wool block is pressed into the expansion joint of the secondary insulation layer of the adjacent insulating board. The flat insulating board slides into the transverse leakage channel from one end. After sliding into place, it is fixed by screws passing through the fixing holes, or by low-temperature resistant adhesive. First, install one row of flat insulating boards in the flat area, with the first row adjacent to the longitudinal leakage channel. After installing the first row, install the second and third rows outwards in sequence until reaching the edge of the flat area.

[0015] After the flat insulating board is installed, install the two-sided corner insulating board and the three-sided corner insulating board. Use the two-sided corner insulating board and the three-sided corner insulating board to seal the edges, and fix them by passing screws through the fixing holes.

[0016] The gaps between the main insulation layers are filled with insulating blocks, the width of which is smaller than the width of the gaps between the main insulation layers. For the variable gaps between the main insulation layers, foam insulation is used to fill them. The outside of the foam insulation is sealed with aluminum foil tape with glass mesh, the width of which is greater than the total width of the gaps between the main insulation layers.

[0017] Furthermore, in the aforementioned fixed B-type cabin insulation system based on leakage diversion channels and its construction method, the longitudinal and transverse leakage diversion channels of each cabin surface are interconnected. The longitudinal leakage diversion channels converge at the top surface air dome and connect to the receiving device at the bottom surface.

[0018] Furthermore, in the aforementioned fixed type B-type cabin insulation system based on leakage diversion channels and its construction method, the length of the dovetail groove of each planar insulation plate is half the diagonal of the square.

[0019] Furthermore, in the aforementioned fixed type B-type cabin insulation system based on leakage diversion channel and its construction method, the main insulation layer and the secondary insulation layer are made of polystyrene foam, polyurethane foam, or phenolic foam.

[0020] Furthermore, in the aforementioned fixed B-type compartment insulation system based on leakage diversion channel and its construction method, the splash-proof layer is made of aluminum or stainless steel with a thickness of 0.5-0.8mm.

[0021] Furthermore, in the aforementioned fixed type B-type cabin insulation system based on leakage diversion channels and its construction method, the thickness of the corrugated aluminum foil is 0.2-0.35mm.

[0022] Furthermore, the aforementioned fixed B-type cabin insulation system based on leakage diversion channels and its construction method further include a planar insulation plate located in the central area of ​​the plane, which is provided with transverse dovetail grooves and longitudinal dovetail grooves. The transverse dovetail grooves and longitudinal dovetail grooves are respectively matched with the transverse leakage diversion channels and the longitudinal leakage diversion channels, and are fixed by adhesion or bolts.

[0023] Furthermore, in the aforementioned fixed B-type compartment insulation system based on leakage diversion channels and its construction method, during installation in the central area of ​​the plane, studs are first welded to the outer surface of the hull. Then, the transverse dovetail grooves and longitudinal dovetail grooves of the central area plane insulation plate are aligned with the transverse leakage diversion channels and longitudinal leakage diversion channels, respectively. After the splash-proof layer is tightly attached to the leakage diversion channels, the extension studs and screws are installed on the existing studs in the fixing holes, and the cover plate is placed on the screws and tightened with nuts.

[0024] Furthermore, the aforementioned fixed type B-type cabin insulation system based on leakage diversion channel and its construction method further include a recessed groove at the top of the fixing hole, with a receiving plate adhered inside the recessed groove.

[0025] The beneficial effects of this invention are:

[0026] 1. The design of the flow channel groove and leakage flow channel of the insulation board of the present invention makes it easy to slide the insulation board into the designated position during installation and fix it relatively in the direction perpendicular to the cabin surface. The installation operation is simple, greatly reducing the welding work of studs and reducing the material cost of insulation systems such as studs and pads.

[0027] 2. The planar area insulation board adopts a diamond-shaped butt joint form. The central area is installed first, followed by the two sides. Adjacent insulation boards can limit each other, which makes it easier for workers to control the installation accuracy and improves the installation efficiency. In contrast, the traditional insulation board installation method is complicated and requires high installation skills from workers.

[0028] 3. For insulation boards in different areas, this invention designs targeted installation and fixing methods, such as flexible selection of bolt fixing and adhesive fixing, as well as reasonable overlapping and gap filling methods between insulation boards in different areas, ensuring the integrity of the entire insulation layer and the installation quality. Traditional insulation system designs lack such systematicness and targetedness. Attached Figure Description

[0029] Figure 1 This is an overall view after the side insulation is installed;

[0030] Figure 2. Layout of the leakage diversion channel in the liquid cargo tank;

[0031] Figure 3 This is a cross-sectional view of the flow guide channel;

[0032] Figure 4 It is a standard flat insulating board;

[0033] Figure 5 It is an irregularly shaped planar insulating board;

[0034] Figure 6 This is a top view of a bolt-fixed central area planar insulating plate;

[0035] Figure 7 This is a top view of an adhesively fixed central area planar insulating board;

[0036] Figure 8 This is a front view of a bolt-fixed central area planar insulating plate;

[0037] Figure 9 This is an enlarged view of section A in the front view of the bolt-fixed central area planar insulating plate;

[0038] Figure 10 It is a trihedral corner area insulation board;

[0039] Figure 11 It is a standard dihedral corner insulation board;

[0040] Figure 12 It is a two-sided corner end insulation board;

[0041] Figure 13 This is a standard planar insulating board mounting view;

[0042] Figure 14 This is a schematic diagram of the insulating components;

[0043] Figure 15 This is an exploded view of the insulation board installation;

[0044] Among them, 1-air dome, 2-longitudinal leakage diversion channel, 3-lateral leakage diversion channel, 4-two-sided corner area insulation board, 5-three-sided corner area insulation board, 6-flat insulation board, 7-hull, 8-splashproof layer, 9-dovetail groove, 12-receiving plate, 13-fixing hole, 16-main insulation layer, 17-secondary insulation layer, 18-cover plate, 19-screw, 20-nut, 21-extension stud, 22-stud, 25-foamed insulation, 26-aluminum foil tape with glass mesh cloth, 27-low temperature resistant adhesive, 28-glass wool block. Detailed Implementation

[0045] A fixed B-type compartment insulation system based on leakage diversion channels and its construction method are disclosed. Each compartment face of the B-type compartment is welded from multiple steel plates. In this design, the longitudinal plate seams of the compartment are located at the vertical centerline, and the transverse plate seams are parallel to the horizontal centerline, with a transverse plate seam spacing of 1300-1500 mm. Depending on the plate seam location, transverse leakage diversion channels 3 and longitudinal leakage diversion channels 2 are arranged above the outer plate seams of the compartment. The leakage diversion channels are inverted trapezoidal and are fixed to the compartment wall by welding or adhesive, and are completely sealed to the compartment body 7. The longitudinal leakage diversion channel 2 of each compartment face communicates with the transverse leakage diversion channel 3. The longitudinal leakage diversion channels converge at the top surface air dome 1 and connect to the receiving device at the bottom surface. If a cryogenic LNG leak occurs at the plate seam, the cryogenic liquid can be collected through the transverse leakage channel 3 to the longitudinal leakage diversion channel 2. The liquid natural gas flows rapidly to the drip receiving device at the bottom of the cargo hold, while the vaporized LNG can be quickly discharged to the outlet of the air dome 1, preventing the cryogenic liquid from spreading to other areas.

[0046] The insulating panels are designed according to the geometry of the cabin and the arrangement of leakage diversion channels. Each insulating panel consists of two layers: a main insulating layer 16 and a secondary insulating layer 17. Each insulating layer has a square cross-section, and the two layers are prefabricated and bonded together using low-temperature resistant adhesive 27. The insulating panels can be made of polystyrene foam, polyurethane foam, phenolic foam, etc., and are staggered diagonally, allowing them to interlock with adjacent insulating panels on all four sides. A splash-proof layer 8 is prefabricated and bonded to the outside of the secondary insulating layer 17 using low-temperature resistant adhesive 27. The splash-proof layer 8 is made of a low-temperature resistant material such as aluminum or stainless steel, and has a certain degree of hardness; its thickness is generally 0.5~0.8mm. An aluminum foil 31 is adhered to the outside of the main insulating layer 16 using low-temperature resistant adhesive 27. The aluminum foil is generally 0.2~0.35mm thick and slightly corrugated to absorb and balance thermal strain within the insulating layer, while also providing protection.

[0047] At the bottom of the 17th insulation layer of the insulation board, there is a dovetail-shaped groove that mates with the leakage guide channel. A typical guide channel groove has an inverted trapezoidal cross-section, parallel to the diagonal of the square insulation board, and its length is half the diagonal length. During insulation board installation, align the dovetail-shaped groove 9 with the transverse leakage guide channel and slide it in from one end of the channel until the designated installation position is reached.

[0048] For the planar insulating plates installed in the central area of ​​each surface of the cargo hold, the bottom guide channel grooves are rectangular, with the longitudinal dovetail grooves and the transverse dovetail grooves perpendicular to each other. The longitudinal dovetail grooves coincide with the diagonal of the insulating plate, and the length of the transverse dovetail grooves is half the length of the diagonal. The planar insulating plates in the central area can be fixed by either adhesive or bolts. If bolts are used, there are fixing holes 13 for installing fixing components in the area where the transverse and longitudinal leakage guide channels intersect in the protruding part of the secondary insulating layer 17 relative to the main insulating layer 16. Above the fixing holes 13 is a recessed groove, and a receiving plate 12 is adhered in the groove. The receiving plate 12 is made of a low-temperature resistant composite material.

[0049] When installing the planar insulation plate in the central area, firstly, weld studs 22 at the predetermined positions on the outer surface of the cabin 7. Then, align the transverse dovetail grooves and longitudinal dovetail grooves of the planar insulation plate in the central area with the corresponding leakage guide channels in the installation area. After the splash-proof layer 8 is tightly attached to the leakage guide channels, install the extension studs 21 and screws 19 on the existing studs 22 in the fixing holes 13, and put the cover plate 18 on the screws 19. Tighten the nuts 20 to fix it. Finally, fill the grooves with foam plugs 15 to complete the secondary insulation layer 17, thereby completing the installation of the planar insulation plate in the central area. If an adhesive fixing method is adopted, the central area planar insulation board has no fixing holes 13 and receiving plate 12. During installation, low-temperature resistant adhesive needs to be applied to the dovetail groove 9 at the bottom of the insulation board. During the open time, the central area planar insulation board is aligned with the corresponding leakage guiding channel, so that the transverse dovetail groove and the longitudinal dovetail groove are respectively attached to the transverse leakage guiding channel 3 and the longitudinal leakage guiding channel 2, thus completing the installation of the central area planar insulation board.

[0050] Insulating boards come in various forms depending on their placement. The standard shape for insulating boards in planar areas is square, but pentagonal, triangular, and other shapes are also available; all are 29 irregular planar insulating boards. The shapes of insulating boards located in dihedral and trihedral areas match the shapes at their boundaries. Trihedral area insulating boards are fixed with five bolts, using the same fixing method as the central area planar insulating boards. The secondary insulating layer 17 protrudes from the main insulating layer 16 on each side and has fixing holes 13 and receiving plates 12. Fixing holes are also present on the protruding portions of the secondary insulating layer relative to the main insulating layer. In standard dihedral area insulating boards, the secondary insulating layer 17 and the main insulating layer 16 are staggered along their shorter sides, with the arc length of the main insulating layer 16 greater than that of the secondary insulating layer 17. The difference in dihedral end-of-line insulating boards is that the main insulating layer 16 protrudes from the secondary insulating layer 17 along both the shorter and longer sides, covering the secondary insulating layer.

[0051] In the planar area, the standard planar insulation plate has an inverted trapezoidal channel groove, and there is a matching trapezoidal leakage channel on the outer side of the hull. Therefore, after the standard planar insulation plate is etched into the trapezoidal leakage channel, it can be relatively fixed in the direction perpendicular to the hull surface. In addition, the planar insulation plate 6 adopts a diamond-shaped butt joint. The planar insulation plate row installed first among adjacent insulation plates can limit the position of the subsequently installed planar insulation plate 6 in both horizontal and vertical 45-degree angular components, which is convenient for workers to install and facilitates one-time control of installation accuracy. For the planar area, the planar insulation plate row in the central area is installed first, and then the planar insulation plate rows on both sides are installed in sequence. This not only makes it easy to position during installation, but also utilizes the main insulation layer 16 of the adjacent installed insulation plate to cover the secondary insulation layer 17 of the corresponding insulation plate, forming a complete double-layer insulation layer in the direction perpendicular to the hull. Furthermore, when the adjacent insulation plates are butt jointed, low-temperature resistant adhesive 27 is applied to the protruding secondary insulation layer insulation plate, and the connection between the two adjacent insulation plates is completed within the open time of the adhesive. After the planar insulating board 6 is installed, the trihedral corner insulating board 5 is installed, and finally the bihedral corner insulating board is installed. The planar insulating board 6 is then pressed together from the boundary to facilitate its fixation. For the bihedral corner area, the standard bihedral corner insulating board is installed first. The main insulation layer 16 of the standard bihedral corner insulating board overlaps the secondary insulation layer 17 of the adjacent planar insulating board 6, trihedral corner insulating board 5, and standard bihedral corner insulating board. Before alignment, 27 low-temperature resistant adhesive is applied to the protruding overlapping area of ​​the secondary insulation layer for fixing the adjacent insulating boards. Finally, the bihedral corner finishing insulating board is used to cover and fill the remaining gaps, completing all insulation laying and achieving insulation layer integrity.

[0052] In addition, expansion joints are left between the insulation boards and the secondary insulation layers 17 of the insulation boards. When installing adjacent insulation boards, glass wool blocks 28 are first adhered to the protruding side of the secondary insulation layer 17 of the insulation board to be installed. After the insulation board to be installed is placed in the designated installation position, the glass wool blocks 28 are squeezed into the expansion joints of the secondary insulation layers 17 of the adjacent insulation boards. The gaps between the main insulation layers 16 are filled with insulating blocks, the width of which is smaller than the width of the gaps between the main insulation layers 16. For the variable gaps between the main insulation layers 16, foam insulation 25 is used to fill them. The outside of the foam insulation 25 is sealed with aluminum foil tape 26 with glass mesh cloth, the width of which is greater than the total width of the gaps between the main insulation layers 16.

Claims

1. A construction method for a fixed type B-cell insulation system based on a leakage diversion channel, characterized in that, This includes prefabricated insulation panels. Depending on the location of the installation area and the shape of the prefabricated insulation panels, the prefabricated insulation panels installed on the flat surface of the B-type cabin bulkhead are flat insulation panels. The prefabricated insulation panels installed at the intersection of two surfaces of the B-type cabin are bifacial corner insulation panels, and the curvature of the bifacial corner insulation panels is the same as the curvature formed by the intersection of two surfaces of the B-type cabin. The prefabricated insulation panels installed at the intersection of three surfaces of the B-type cabin are trifacial insulation panels, and the curvature of the trifacial insulation panels is the same as the curvature formed by the intersection of three surfaces of the B-type cabin. The planar insulation board, the two-sided corner area insulation board, and the three-sided corner area insulation board are all composed of a main insulation layer and a secondary insulation layer. The main insulation layer and the secondary insulation layer are stacked in a staggered manner and bonded together with low-temperature resistant adhesive. A corrugated aluminum foil is bonded to the outer surface of the main insulation layer, and a splash-proof layer is bonded to the outer surface of the secondary insulation layer. Fixing holes are provided on the edges of the secondary insulation layer that are not connected to the main insulation layer. The outer surface of the Type B cabin is provided with a transverse leakage diversion channel parallel to the horizontal plane and a longitudinal leakage diversion channel perpendicular to the horizontal plane. The longitudinal leakage diversion channel is located on the longitudinal centerline of the cabin surface. The cross-section of the transverse leakage diversion channel and the longitudinal leakage diversion channel is dovetail-shaped. The planar insulating plate has a main shield and a secondary shield that are both square. The secondary shield has multiple dovetail grooves below it. The multiple dovetail grooves are parallel to the diagonal of the square. The two ends of the dovetail grooves are located at the edge of the planar insulating plate and are open. The dovetail grooves cooperate with the transverse leakage guide channels and can slide on the adjacent transverse guide channels. During installation, first install the flat insulating board. On the protruding side of the secondary insulation layer of the insulating board to be installed, first adhere the glass wool block to it. After the insulating board to be installed enters the designated installation position, the glass wool block is squeezed into the expansion joint of the secondary insulation layer of the adjacent insulating board. The flat insulating board slides into the transverse leakage channel from one end. After sliding into place, it is fixed by screws passing through the fixing holes or by low-temperature resistant adhesive. First, install a row of flat insulating boards in the flat area. The first row of flat insulating boards is adjacent to the longitudinal leakage channel. After installing the first row of flat insulating boards, install the second row and the third row of flat insulating boards outward in sequence until the edge of the flat area is reached. After the flat insulating board is installed, install the two-sided corner area insulating board and the three-sided corner area insulating board. Use the two-sided corner area insulating board and the three-sided corner area insulating board to seal the edges, and fix them by passing screws through the fixing holes. The gaps between the main insulation layers are filled with insulating blocks, the width of which is smaller than the width of the gaps between the main insulation layers. For the variable gaps between the main insulation layers, foam insulation is used to fill them. The outside of the foam insulation is sealed with aluminum foil tape with glass mesh, the width of which is greater than the total width of the gaps between the main insulation layers.

2. The construction method of the fixed type B-cell insulation system based on leakage diversion channel according to claim 1, characterized in that, The longitudinal and transverse leakage diversion channels of each deck are connected. The longitudinal leakage diversion channels converge at the top dome on the top surface and connect to the receiving device on the bottom surface.

3. The construction method of the fixed type B-cell insulation system based on leakage diversion channel according to claim 1, characterized in that, The length of the dovetail groove in each planar insulating plate is half the diagonal of the square.

4. The construction method of the fixed type B-cell insulation system based on leakage diversion channel according to claim 1, characterized in that, The main insulation layer and the secondary insulation layer are made of polystyrene foam, polyurethane foam, or phenolic foam.

5. The construction method of the fixed type B-cell insulation system based on leakage diversion channel according to claim 1, characterized in that, The splash-proof layer is made of aluminum or stainless steel and has a thickness of 0.5-0.8mm.

6. The construction method of the fixed type B-cell insulation system based on leakage diversion channel according to claim 1, characterized in that, The thickness of the corrugated aluminum foil is 0.2-0.35mm.

7. The construction method of the fixed type B-cell insulation system based on leakage diversion channel according to claim 1, characterized in that, The planar insulating plate located in the central area of ​​the plane has horizontal dovetail grooves and vertical dovetail grooves. The horizontal and vertical dovetail grooves are respectively matched with the horizontal leakage guide channel and the vertical leakage guide channel, and are fixed by adhesive or bolts.

8. The construction method of the fixed type B-cell insulation system based on leakage diversion channel according to claim 7, characterized in that, When installing in the central area of ​​the plane, first weld studs to the outer surface of the hull. Then align the transverse dovetail grooves and longitudinal dovetail grooves of the central area plane insulation plate with the transverse leakage guide channel and the longitudinal leakage guide channel, respectively. After the splash-proof layer is tightly attached to the leakage guide channel, install the extension stud and screw on the existing stud in the fixing hole, and put the cover plate on the screw and tighten it with nuts.

9. The construction method of the fixed type B-cell insulation system based on leakage diversion channel according to claim 1, characterized in that, The top of the fixing hole has a recessed groove, and a support plate is adhered inside the recessed groove.

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