Insulation systems for Type B independent tanks and ships

Abstract

The present invention provides an insulated system for a Type B isolated tank and a vessel. The insulated system for a Type B isolated tank includes a liquid-tight substrate (200), an insulating layer (300), an anchor unit (400), and a discharge kit (500). The anchor unit (400) includes an anchor body (410), a plurality of propellers (420), and an insulated connecting block (430). The anchor body (410) includes a fixed end fixed to the tank hull (100) and a connecting end (412) positioned on the liquid-tight substrate (200). One end of the propeller (420) is connected to the connecting end (412) of the anchor body (410), and the other end is connected to the insulating layer (300). The discharge kit (500) includes a discharge pipe (510), a drip tray (520), and a dam plate (530). The discharge pipe (510) is fixedly connected at one end to the tank and extends at the other end to a predetermined discharge position. A droplet catcher (520) is provided to surround the discharge pipe (510). The inner edge of the droplet catcher (520) is sealed to the outer wall of the discharge pipe (510). A dam plate (530) is provided on the droplet catcher (520). The bottom of the dam plate (530) is sealed to the droplet catcher (520). The droplet chamber (560) is surrounded by the liquid-tight substrate (200), the dam plate (530), and the droplet catcher (520). The droplet chamber (560) is in communication with the leakage channel (210). A discharge hole (511) is provided in the discharge pipe (510).

Description

Technical Field

[0001] This application relates to the technical field of ship design, specifically to an insulation system in a Type B independent tank and a ship.

Background Art

[0002] The liquid-tight housing for loading cryogenic liquid cargo in a liquefied gas tanker is called a liquid cargo tank and abbreviated as a tank. Tanks are of the membrane type and the independent type. The independent type includes Type A, Type B, and Type C. The Type B independent tank has been used as a liquefied natural gas transport ship for many years because of its large space, small daily evaporation rate of LNG, and easy installation and maintenance. According to the design specifications of the Type B independent tank, an insulation layer is required to prevent the hull temperature from dropping below the allowable value and to regulate the heat flux entering the tank to a level that can be maintained by the pressure-temperature control system. However, the Type B independent tank is a tank type with a unique structure, and its insulation system is different from that of the membrane type tank, which is relatively mature in technology at present.

[0003] Currently, the insulation systems in Type B independent tanks include a spray-type insulation system and a panel-type insulation system. In the spray-type insulation system, a polyurethane foam layer is sprayed on the outer surface of the tank outer plate. In the panel-type insulation system, prefabricated insulation panels are attached to the outer surface of the tank outer plate. However, in any insulation system, if the fixation of the insulation system is unstable, the insulation layer may peel off from the tank or delaminate within the insulation layer itself, resulting in cracks in the insulation layer and loss of its function as a splash prevention barrier. As a result, the cryogenic liquid leaked from the tank directly splashes onto the hull structure, leading to serious ship safety accidents.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The objective of the embodiments of this invention is to provide a Type B independent tank insulation system and vessel that solves the conventional technical problem that the fixing of the insulation system is unstable, and if a crack occurs in the insulation layer, the leaked low-temperature liquid will directly splash onto the hull structure, leading to a serious ship safety accident. [Means for solving the problem]

[0005] In the first phase, an insulation system for a Type B isolated tank is provided. The insulation system for the Type B isolated tank includes a liquid-tight substrate provided on the outer surface of the tank casing, with a leakage groove provided on the surface adjacent to the tank casing; an insulation layer provided on the outer surface of the liquid-tight substrate; and an anchor body, a plurality of screws, and an insulating connecting block fixed at predetermined positions on the outer surface of the tank casing, wherein the anchor body includes a fixed end fixed to the outer surface of the tank casing and a connecting end positioned on the liquid-tight substrate; the plurality of screws are connected front and rear via the insulating connecting block to form a long screw; the long screw has one end connected to the connecting end of the anchor body and the other end fixedly connected to the insulation layer; and an anchor unit, a discharge pipe, a drip tray, and a dam A discharge kit includes a plate, one end of the discharge pipe fixedly positioned at a predetermined location on the outer surface of the tank outer plate, the other end of the discharge pipe extending to a predetermined discharge position, the droplet receiver provided to surround the discharge pipe, the inner edge of the droplet receiver sealedly connected to the outer wall of the discharge pipe, the dam plate provided on the droplet receiver, the top portion of the dam plate sealedly connected to the liquid-tight substrate, the bottom portion of the dam plate sealedly connected to the droplet receiver, the liquid-tight substrate, the dam plate and the droplet receiver surround a droplet chamber, the droplet chamber communicates with the leakage groove, and the discharge pipe located within the droplet chamber has a discharge hole opened at a position close to the droplet receiver.

[0006] In one embodiment, threaded nuts are provided at both the fixed end and the connecting end of the anchor body, and stud bolts are fixed at predetermined positions on the outer surface of the tank's outer plate. The fixed end of the anchor body is connected to the stud bolt via the threaded nuts, and one end of the long screw is connected to the threaded nut at the connecting end.

[0007] In one embodiment, the length of each screw is 50 mm or less. Internal and external threaded nuts are pre-embedded at both ends of the heat-insulating connecting block. The screws are connected to the heat-insulating connecting block via the internal and external threaded nuts.

[0008] In one embodiment, the discharge kit further includes a base and a fastening member. The base includes a bottom plate and a sleeve. The bottom plate is fixed to the outer surface of the tank's outer plate. The sleeve is fixed to the surface of the bottom plate. The discharge pipe is inserted into the sleeve of the base. The sleeve is provided with an opening. The fastening member passes through the opening and fastens the discharge pipe to the bottom plate.

[0009] In one embodiment, the insulation layer includes an inner insulation layer, an outer insulation layer, and a mesh reinforcement layer. The inner insulation layer is disposed on the outer surface of the liquid-tight substrate. The mesh reinforcement layer covers the outer surface of the inner insulation layer. The outer insulation layer is laid on the outer surface of the mesh reinforcement layer. The other end of the long screw is fixedly connected to the inner insulation layer and the mesh reinforcement layer.

[0010] In one embodiment, the other end of the elongated screw is connected to the mesh reinforcement layer via a connecting unit. The connecting unit includes a gasket, a plurality of U-shaped nails, and a nut. The other end of the elongated screw penetrates the inner insulation layer and the mesh reinforcement layer. The gasket is provided with a central hole and a plurality of symmetrically arranged fixing holes. The central hole is positioned to allow insertion of the penetrating portion at the other end of the elongated screw. The U-shaped nails pass through the fixing holes and are inserted into and fixed in the inner insulation layer and the mesh reinforcement layer. The nut is positioned on the gasket and fixedly connected to the elongated screw.

[0011] In one embodiment, the droplet receiver has a planar structure. Aluminum glass cloth is attached to the inside of the dam plate. The dam plate, the liquid-tight substrate, and the droplet receiver are sealed together with a low-temperature adhesive.

[0012] In one embodiment, the outer shape of the heat-insulating connecting block is ellipsoidal or spherical.

[0013] In one embodiment, the distance between the outer surface of the heat insulating layer and the outer surface of the tank's outer plate is 30 mm or more.

[0014] In one embodiment, an external protective layer is further included. The external protective layer is laid on the outer surface of the heat insulating layer.

[0015] In one embodiment, the cross-section of the anchor body is T-shaped. The anchor body includes two cylindrical structures connected coaxially. The internal and external threaded nuts are pre-embedded within each of the two cylindrical structures.

[0016] In one embodiment, a metal layer is attached to the outer surface of the liquid-tight substrate. Adhesive is applied between the seams of the edges of the liquid-tight substrate. Aluminum glass cloth is attached to the seams of the liquid-tight substrate.

[0017] In one embodiment, the shape of the edge joint of the liquid-tight substrate is mortise-shaped. In a second aspect of the present invention, a vessel having an internally mounted tank is provided. The outer surface of the tank hull is provided with the insulation system for a Type B independent tank as described in any of the first aspects.

[0018] In one embodiment, the shape of the tank is polygonal. The outer surface of the tank's outer plate includes a top region, a plurality of side regions, and a bottom region. The anchor units are distributed in the top region and the plurality of side regions, and the anchor units and the discharge kit are arranged alternately in the bottom region.

[0019] In one embodiment, the shape of the tank is spherical. The anchor unit and the discharge kit are alternately arranged in the region directly below the spherical center of the tank, and the anchor unit is arranged in the other regions of the tank. [Effects of the Invention]

[0020] The thermal insulation system in the independent tank of type B of this invention has the following beneficial effects.

[0021] By rationally designing the anchor unit and discharge kit in the insulation system and securely connecting the insulation system and tank, excellent insulation performance is achieved. This effectively prevents the hull temperature of the liquefied gas tanker from dropping below acceptable levels and regulates the heat flux entering the liquid cargo tank to a level that can be maintained by the pressure and temperature control system used in the liquefied gas tanker. Furthermore, in the event of a liquid cargo leak from the liquid cargo tank, the discharge kit guides the liquid smoothly to a designated location. This prevents cold liquid cargo from directly contacting the hull structure, ensuring the safety of the hull structure.

[0022] To more clearly explain the technical means of the embodiments of the present application, the drawings required for use in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. Those skilled in the art can obtain other related drawings based on these drawings without creative labor.

Brief Description of the Drawings

[0023] [Figure 1] FIG. 1 is a schematic structural diagram of a heat insulation system in an independent tank of type B shown based on an embodiment of the present application. [Figure 2] FIG. 2 is a schematic structural diagram of an anchor unit shown based on an embodiment of the present application. [Figure 3] FIG. 3 is a schematic structural diagram of a discharge kit shown based on an embodiment of the present application. [Figure 4] FIG. 4 is a view seen from the D direction of FIG. 2. [Figure 5] FIG. 5 is an arrangement diagram of an anchor unit and a liquid-tight substrate shown based on an embodiment of the present application. [Figure 6] FIG. 6 is a cross-sectional view taken along the C-C direction of FIG. 5. [Figure 7] FIG. 7 is a schematic structural diagram of a joint of the liquid-tight substrate shown based on an embodiment of the present application. [Figure 8] FIG. 8 is a schematic structural diagram 1 of a ship shown based on an embodiment of the present application. [Figure 9] FIG. 9 is a schematic structural diagram 2 of a ship shown based on an embodiment of the present application. [Figure 10] FIG. 10 is an arrangement diagram of an anchor unit in a ship shown based on an embodiment of the present application. [Figure 11] FIG. 11 is a schematic structural diagram 1 of a leakage groove shown based on an embodiment of the present application. [Figure 12] FIG. 12 is a schematic structural diagram 2 of a leakage groove shown based on an embodiment of the present application.

Modes for Carrying Out the Invention

[0024] To clarify the purpose, technical means, and advantages of the embodiments of this application, the technical means in the embodiments of this application will be described clearly and concisely below, in conjunction with the drawings of the embodiments. Needless to say, the embodiments described are only a selection of embodiments of this application, not all of them. Also, the components of the embodiments of this application described and shown in the drawings here can usually be arranged and designed in various different configurations.

[0025] Accordingly, the following detailed description of the illustrated embodiments of the Application is not intended to limit the scope of the Protection Claimed by the Application, but merely to illustrate selective embodiments of the Application. All other embodiments obtained by a person skilled in the art based on the embodiments of the Application, without requiring any creative work, are all within the scope of the Protection of the Application.

[0026] In the first aspect, the present invention provides an insulating system for a Type B isolated tank. Figure 1 is a schematic diagram of the insulating system for a Type B isolated tank, as shown based on an embodiment of the present invention. Referring to Figure 1, it includes a liquid-tight substrate 200, an insulating layer 300, an anchor unit 400, and a discharge kit 500.

[0027] The liquid-tight substrate 200 is provided on the outer surface of the tank outer shell 100. The liquid-tight substrate is made of an insulating material including (but not limited to) polyurethane foam, polystyrene foam, polyethylene, phenolic resin foam, etc. A leakage groove 210 is provided on the inner surface of the liquid-tight substrate 200 adjacent to the tank outer shell. Depending on the differences in processing methods and design requirements, the shape of the leakage groove may be trapezoidal or rectangular, as shown in Figures 11 to 12. However, it is preferable to make it trapezoidal so that it can be used in processing methods that process the liquid-tight substrate using an integral foaming method. This is because the trapezoidal cross-section helps in the demolding of the mold after pre-foaming, reducing the risk of material breakage and damage during the demolding process and improving the yield rate. In addition, the trapezoidal shape can reduce stress concentration at the corners of the leakage groove, thus reducing the risk of crack formation. Furthermore, because it forms a relatively wide opening shape, it is advantageous in avoiding contact between the liquid-tight substrate and the welded joints of the tank.

[0028] The thermal insulation layer 300 is provided on the outer surface of the liquid-tight substrate 200.

[0029] Referring to Figures 1 and 2, the anchor unit 400 is fixed to a predetermined position on the outer surface of the tank casing. Also, referring to Figure 5, the anchor unit 400 is fixed to the joint of the insulation layer 300. The anchor unit 400 includes an anchor body 410, a plurality of screws 420, and an insulating connecting block 430. It should be noted that the screws are made of metal. The anchor body 410 includes a fixed end 411 fixed to the outer surface of the tank casing and a connecting end 412 placed on the liquid-tight substrate 200. The plurality of screws 420 are connected at their front and rear ends via the insulating connecting block 430 to form a long screw. One end of the long screw is connected to the connecting end of the anchor body 410, and the other end is fixedly connected to the insulation layer 300. The anchor body 410 is made of a material with low thermal conductivity, including (but not limited to) wood or polytetrafluoroethylene. This reduces the heat transmitted in the axial direction of the anchor member, which is advantageous for the insulation system to maintain good thermal insulation properties.

[0030] Referring to Figures 1 and 3, the discharge kit 500 includes a discharge pipe 510, a drip tray 520, and a dam plate 530. One end of the discharge pipe 510 is fixedly positioned at a predetermined location on the outer surface of the tank's outer plate, and the other end of the discharge pipe 510 extends to a predetermined discharge position. The drip tray 520 is provided to surround the discharge pipe 510. The inner edge of the drip tray 520 is sealed to the outer wall of the discharge pipe 510. The dam plate 530 is provided on the outer edge of the drip tray 520. The top of the dam plate 530 is sealed to the liquid-tight substrate 200. The bottom of the dam plate 530 is sealed to the drip tray 520. The liquid-tight substrate 200, the dam plate 530, and the drip tray 520 surround a drip chamber 560. The drip chamber 560 communicates with the leak groove 210. A discharge hole 511 is provided in the discharge pipe 510 located within the droplet chamber 560, adjacent to the droplet receiver 520. The discharge hole is elliptical in shape. This design allows liquid cargo to be discharged through the discharge hole as much as possible, even when the ship is rocking. In possible embodiments, a droplet receiver is welded to the middle section of the discharge pipe. This prevents the liquid cargo from directly contacting and penetrating the insulation layer by receiving the liquid cargo that flows out from the leakage groove of the liquid-tight substrate. The dam plate may be made of an insulation material including (but not limited to) polyurethane foam, polystyrene foam, polyethylene, phenolic resin foam, etc. Furthermore, to ensure liquid-tightness, aluminum glass cloth 531 is attached to the inside of the dam plate, and the liquid-tight substrate 200 and the droplet receiver 520 are bonded together with a low-temperature adhesive 532. A discharge hole 511 is also provided between the base 540 and the droplet receiver 520. The discharge port, along with the liquid-tight substrate and leakage groove, constitutes a leakage path that guides the low-temperature liquid leaking from the liquid cargo tank into the discharge pipe and releases it to a designated location outside.

[0031] In the implementation process described above, a rational design achieves excellent thermal insulation, effectively preventing the hull temperature of the liquefied gas tanker from dropping below permissible levels, and regulating the heat flux entering the liquid cargo tank to a level that can be maintained by the pressure and temperature control system used in the liquefied gas tanker. Furthermore, in the event of a liquid cargo leak in the liquid cargo tank, it is possible to smoothly guide the low-temperature liquid to a designated location. This prevents the low-temperature liquid cargo from coming into direct contact with the hull structure, thereby ensuring the safety of the hull structure. In addition, the thermal insulation system for the Type B independent tank disclosed herein is low-cost.

[0032] In this embodiment, referring to Figure 2, internal and external threaded nuts 413 are provided at both the fixed end 411 and the connecting end 412 of the anchor body. Stud bolts 110 are fixed at predetermined positions on the outer surface of the tank's outer plate. The material of the stud bolts 110 and the material of the liquid cargo tank's outer plate have matching welding characteristics. The fixed end 411 of the anchor body 410 is connected to the stud bolts 110 via the internal and external threaded nuts 413. One end of the long screw is connected to the internal and external threaded nut 413 of the connecting end 412. This method of connecting the screw and the internal and external threaded nut strengthens the connection strength and securely fixes the insulation layer. The insulated connecting block 430 has internal and external threaded nuts pre-embedded at both ends to which the screw is connected. Therefore, it is strong, durable, and has excellent durability, and the reliability of screw tightening is greatly improved. The length of each screw 420 is 50 mm or less. Internal and external threaded nuts 413 are similarly pre-embedded at both ends of the insulated connection block 430, and the screws 420 are connected to the insulated connection block 430 via the internal and external threaded nuts 413. In addition, the external shape of the insulated connection block 19 is ellipsoidal or spherical to increase its strength. In this application, since screws are used for connection, the heat transfer performance of the screws must be considered. Therefore, when the connection length exceeds 100 mm, the design is such that one additional insulated connection block 430 is added to connect the two screws 420 with the insulated connection block 430. Furthermore, after the length exceeds 100 mm, it is necessary to add one insulated connection block 430 for every 50 mm increase in length. The insulated connection block 430 is made of a material with low thermal conductivity, including (but not limited to) wood and polytetrafluoroethylene. This reduces the heat transmitted in the axial direction of the anchor unit, which is advantageous for the insulation system to maintain good insulation properties.

[0033] Referring to Figure 3, the discharge kit 500 further includes a base 540 and a fastening member 550. The base 540 includes a bottom plate 541 and a sleeve 542. The bottom plate 541 is fixed to the outer surface of the tank's outer plate. The sleeve 542 is fixed to the surface of the bottom plate 541. The discharge pipe 510 is inserted into the sleeve 542 of the base 540. The sleeve 542 has an opening. The fastening member 550 passes through the opening and fastens the discharge pipe 510 to the bottom plate 541. The sleeve is pre-welded to the bottom plate, and the base is welded to the outer surface of the outer plate at the bottom of the liquid cargo tank. The bottom plate is provided so that, in the event of incorrect mounting positioning or other technical challenges, the sleeve can be cut from the bottom plate and repositioned and welded to the bottom plate without damaging the steel plate of the liquid cargo tank's outer plate. This is particularly important for cryogenic and cryogenic liquid cargo tanks.

[0034] In one embodiment, the thermal insulation layer 300 includes an inner thermal insulation layer 310, an outer thermal insulation layer 320, and a mesh reinforcement layer 600. The inner thermal insulation layer 310 is placed on the outer surface of the liquid-tight substrate 200. The mesh reinforcement layer 600 covers the outer surface of the inner thermal insulation layer 310. The outer thermal insulation layer 320 is laid on the outer surface of the mesh reinforcement layer 600. The other end of the long propeller is fixedly connected to the inner thermal insulation layer 310 and the mesh reinforcement layer 600. Specifically, the surface of the molded inner thermal insulation layer 310 is covered by the mesh reinforcement layer 600. The mesh reinforcement layer 600 is composed of one or more mesh materials. Mesh materials include glass fiber mesh, carbon fiber mesh, metal mesh, etc. The mesh reinforcement layer 600 improves the strength of the thermal insulation layer and effectively reduces the risk of damage to the thermal insulation layer when the thermal insulation layer is affected by deformation of the thermal insulation layer itself, deformation of the liquid cargo tank, rocking of the hull, etc.

[0035] Specifically, in this embodiment, the inner insulation layer 310 has good insulation properties, effectively preventing the hull temperature of the liquefied gas tanker from dropping below an acceptable level, and regulating the heat flux entering the liquid cargo tank to a level that can be maintained by the pressure and temperature control system used in the liquefied gas tanker. The inner insulation layer 310 is made of polyurethane foam material and is laid on the surface of the liquid-tight substrate 200 and discharge kit 500 by foam molding by direct spraying or by bonding with an adhesive. The outer insulation layer 320 is also made of polyurethane foam material and is laid on the surface of the inner insulation layer 310 and mesh reinforcement layer 600 by foam molding by direct spraying or by bonding with an adhesive. In this invention, the distance between the outer surface of the insulation layer 300 and the outer surface of the tank hull is 30 mm or more, and this is the total thickness of the insulation layer.

[0036] In one embodiment, the other end of the long screw is connected to the mesh reinforcement layer 600 via a connecting unit 440. The connecting unit 440 includes a gasket 441, a plurality of U-shaped nails 442, and nuts 443. The other end of the long screw penetrates the inner insulation layer 310 and the mesh reinforcement layer 600. The gasket 441 is provided with a central hole and a plurality of symmetrically arranged fixing holes. The central hole is positioned to allow insertion of the penetrating portion at the other end of the long screw. The U-shaped nails 442 pass through the fixing holes and are inserted into and fixed in the inner insulation layer 310 and the mesh reinforcement layer 600. Nuts 443 are also positioned on the gasket 441 and fixedly connected to the long screw. The connection and fixing of the stud bolt 110, anchor body 410, insulated connecting block 430, gasket 441, nuts 443, etc., provides an additional tightening force in the thickness direction of the insulation layer. This contributes to improving the bonding strength and stability between the liquid-tight substrate 200, the inner insulation layer 310, and the outer insulation layer 320. The gasket 441 is made of a low-temperature resistant material including (but not limited to) polytetrafluoroethylene and metal materials. The gasket is designed with reinforcing ribs to improve its strength and make it less prone to deformation.

[0037] In one embodiment, the droplet receiver 520 has a flat structure with no curled edges to ensure sufficient mounting space for tightening the fastening member. In addition, an aluminum glass cloth 531 is attached to the inside of the dam plate 530. The dam plate 530, the liquid-tight substrate 200, and the droplet receiver 520 are sealed together with an adhesive 532.

[0038] In one embodiment, the outer shape of the heat-insulating connecting block 430 is ellipsoidal or spherical.

[0039] In one embodiment, the system further includes an external protective layer 700. The external protective layer 700 is laid on the outer surface of the insulation layer 300. Specifically, the external protective layer 700 is laid on the surface of the outer insulation layer 320 by spray molding or adhesive bonding. Furthermore, the external protective layer 700 is composed of a material of appropriate strength, including polymers, glass fiber reinforced plastic materials, metal materials, etc. This provides good mechanical protection, aging resistance, and other benefits to the insulation layer.

[0040] In one embodiment, the cross-section of the anchor body 410 is T-shaped. The anchor body 410 includes two cylindrical structures connected coaxially. Internally and externally threaded nuts 413 are pre-embedded within each of the two cylindrical structures. The T-shaped cross-section allows for sufficient pressure contact and compaction with the liquid-tight substrate 200.

[0041] Referring to Figure 6, a metal layer 230 is attached to the outer surface of the liquid-tight substrate 200. The metal layer may be a metal foil or a metal sheet, and by forming a liquid-tight barrier on the surface of the liquid-tight substrate 200, it is possible to effectively prevent leaked liquid cargo from penetrating in the direction of the thermal insulation thickness. Furthermore, in low-temperature / deep-cold environments, or when leaked liquid cargo is scattered on the surface, the metal layer improves the surface strength of the liquid-tight substrate, effectively preventing cracking of the liquid-tight substrate. Adhesive is applied between the edge seams 220 of the liquid-tight substrate 200. In addition, aluminum glass cloth 531 is attached to the seams of the liquid-tight substrate. This is intended to further strengthen the connection with the liquid-tight substrate. If the sealing of the edge seams becomes ineffective, the aluminum glass cloth layer can act as a liquid-tight barrier. The shape of the edge seams 220 of the liquid-tight substrate 200 is mortise-type (see Figures 6 and 7a), which improves the stability of the connection and makes it possible to avoid loss of connection function such as detachment or delamination. The shape of the edge joint 220 may also be other shapes, such as vertical (see Figure 7b), S-shaped (see Figure 7c), and angled (see Figure 7d).

[0042] In a second aspect, the present invention further provides a vessel having an internally mounted tank. The outer surface of the tank hull is provided with the insulation system for a Type B independent tank as described in any of the first aspects.

[0043] Referring to Figure 8, the tank has a polygonal shape. The outer surface of the tank's outer plate includes a ceiling region 121, multiple side regions 122, and a bottom region 123. The anchor units 400 are distributed in the ceiling region 121 and the multiple side regions 122 at a first predetermined distance apart (see Figure 10). The anchor units 400 and discharge kits 500 are arranged alternately in the bottom region 123 (see Figure 1).

[0044] Referring to Figure 9, the tank has a spherical shape. The anchor units 400 and discharge kits 500 are alternately positioned in the region 124 directly below the center of the sphere of the tank (see Figure 10). Additionally, the anchor units 400 are positioned in other regions 125 of the center of the sphere, separated by a second predetermined distance (see Figure 1).

[0045] The foregoing description is merely a preferred embodiment of the present application and does not limit it. Various modifications and variations of the present application are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present application shall be within the scope of protection. [Explanation of symbols]

[0046] 100 Tank outer panel 110 Stud bolts 121 Ceiling area 122 Lateral region 123 Bottom area 124 The area directly below the center of the sphere 125 Other areas of the sphere 200 liquid-tight substrates 210 Leakage channel 220 Edge joint 230 Metal layer 300 Insulation layer 310 Inner insulation layer 320 Outer insulation layer 400 Anchor Unit 410 Anchor body 411 Fixed end 412 Connection terminal 413 Internal and external threaded nuts 420 Screw 430 Insulated Connection Block 440 Connection Units 441 Gasket 442 U-shaped nail 443 Nut 500 Discharge Kit 510 Discharge pipe 511 Discharge hole 520 Droplet tray 530 Dam Plate 531 Aluminum glass cloth 532 Adhesive 540 base 541 Bottom plate 542 sleeves 550 Fastening member 560 Droplet Chamber 600 mesh reinforced layer 700 outer protective layer

Claims

1. An insulation system for a Type B independent tank, A liquid-tight substrate is provided on the outer surface of the tank's outer plate, and a leakage groove is provided on the surface adjacent to the tank's outer plate. A heat insulating layer provided on the outer surface of the liquid-tight substrate, An anchor unit fixed to a predetermined position on the outer surface of the tank outer plate, comprising an anchor body, a plurality of screws, and an insulating connecting block, wherein the anchor body includes a fixed end fixed to the outer surface of the tank outer plate and a connecting end placed on the liquid-tight substrate, the plurality of screws are connected at their front and rear ends via the insulating connecting block to form a long screw, and the long screw has one end connected to the connecting end of the anchor body and the other end fixedly connected to the insulating layer, A discharge kit comprising a discharge pipe, a droplet receiver, and a dam plate, wherein one end of the discharge pipe is fixedly positioned at a predetermined location on the outer surface of the tank's outer plate, the other end of the discharge pipe extends to a predetermined discharge position, the droplet receiver is provided so as to surround the discharge pipe, the inner edge of the droplet receiver is sealedly connected to the outer wall of the discharge pipe, the dam plate is provided on the droplet receiver, the top of the dam plate is sealedly connected to the liquid-tight substrate, the bottom of the dam plate is sealedly connected to the droplet receiver, a droplet chamber is surrounded by the liquid-tight substrate, the dam plate, and the droplet receiver, the droplet chamber is in communication with the leakage groove, and the discharge pipe located within the droplet chamber has a discharge hole opened at a position close to the droplet receiver. A thermal insulation system for a Type B independent tank, characterized by including the following:

2. The anchor body is provided with internally and externally threaded nuts at both its fixed and connecting ends. Stud bolts are fixed at predetermined positions on the outer surface of the tank's outer plate. The fixed end of the anchor body is connected to the stud bolt via the internal and external threaded nut, The insulation system for an independent tank of type B according to claim 1, characterized in that one end of the long screw is connected to the internal and external threaded nut of the connecting end.

3. The length of each screw is 50 mm or less. Internal and external threaded nuts are pre-embedded at both ends of the aforementioned insulated connecting block. The insulation system in an independent tank of type B according to claim 1, characterized in that the screw is connected to the insulated connecting block via the internal and external threaded nut.

4. The discharge kit further includes a base and a fastening member, The base includes a bottom plate and a sleeve, the bottom plate being fixed to the outer surface of the tank outer plate, and the sleeve being fixed to the surface of the bottom plate. The insulation system for a Type B independent tank according to claim 1, characterized in that the discharge pipe is inserted into the sleeve of the base, the sleeve is provided with an opening, and the fastening member passes through the opening to fix the discharge pipe to the bottom plate.

5. The aforementioned insulation layer includes an inner insulation layer, an outer insulation layer, and a mesh reinforcement layer. The inner insulation layer is arranged on the outer surface of the liquid-tight substrate, the mesh reinforcement layer covers the outer surface of the inner insulation layer, and the outer insulation layer is laid on the outer surface of the mesh reinforcement layer. The other end of the long screw is fixedly connected to the inner insulation layer and the mesh reinforcement layer, characterized in that the insulation system in an independent tank of type B according to claim 1.

6. The other end of the long screw is connected to the mesh reinforcement layer via a connecting unit. The aforementioned connection unit includes a gasket, a plurality of U-shaped nails and nuts, The other end of the long screw penetrates the inner insulation layer and the mesh reinforcement layer, The gasket is provided with a central hole and a plurality of symmetrically arranged fixing holes. The central hole is positioned so as to allow the through portion at the other end of the long screw to pass through. The U-shaped nail passes through the fixing hole and is inserted into and fixed in the inner insulation layer and the mesh reinforcement layer. The insulation system in an independent tank of type B according to claim 5, characterized in that the nut is positioned in the gasket and fixedly connected to the long screw.

7. The thermal insulation system for an independent tank of type B according to claim 1, characterized in that the droplet receiver has a planar structure, aluminum glass cloth is attached to the inside of the dam plate, and the dam plate, the liquid-tight substrate, and the droplet receiver are sealed together with a low-temperature adhesive.

8. The thermal insulation system for an independent tank of type B according to claim 1 or 3, characterized in that the outer shape of the thermal insulation connecting block is ellipsoidal or spherical.

9. The insulation system for an independent tank of type B according to claim 1, characterized in that the distance between the outer surface of the insulation layer and the outer surface of the tank outer plate is 30 mm or more.

10. The insulation system for an independent tank of type B according to claim 1, further comprising an external protective layer laid on the outer surface of the aforementioned insulation layer.

11. The cross-section of the anchor body is T-shaped. The anchor body includes two cylindrical structures connected coaxially, The insulation system in an independent tank of type B according to claim 2, characterized in that the internal and external threaded nuts are pre-embedded in each of the two cylindrical structures.

12. The heat insulation system for an independent tank of type B according to claim 1, characterized in that a metal layer is attached to the outer surface of the liquid-tight substrate, adhesive is applied between the edge seams of the liquid-tight substrate, and aluminum glass cloth is attached to the seams of the liquid-tight substrate.

13. The heat insulation system for an independent tank of type B according to claim 1, characterized in that the shape of the edge joint of the liquid-tight substrate is mortise-shaped.

14. A vessel having an internally installed tank, characterized in that the outer surface of the tank's outer shell is provided with an insulating system for an independent tank of type B as described in any one of claims 1 to 13.

15. The shape of the aforementioned tank is polygonal. The outer surface of the tank outer plate includes a top region, multiple side regions, and a bottom region. The anchor units are distributed in the ceiling region and the plurality of side regions, The vessel according to claim 14, characterized in that the anchor unit and the discharge kit are arranged alternately in the bottom region.

16. The shape of the aforementioned tank is spherical. The anchor unit and the discharge kit are alternately arranged in the region directly below the spherical center of the tank. The vessel according to claim 14, characterized in that the anchor unit is located in another area of ​​the tank.

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