An insulating layer structure with a flow guiding function

Abstract

The application provides an insulation layer structure with a flow guiding function, which comprises a plurality of insulation blocks fixed on a liquid tank perimeter plate, the insulation blocks are fixed by fixing devices and form gaps with the liquid tank perimeter plate, the innermost side of the gap between two adjacent insulation blocks is covered by a flow guiding device, so that a closed flow layer is formed between the inner surface of the insulation blocks and the liquid tank perimeter plate, when the liquid tank is damaged, the leaked gas or liquid enters the flow layer, the leaked gas can be detected by a gas detection device, and the leaked liquid can be drained to a special leaked liquid collecting device by the flow guiding device. Compared with the prior art, the application has excellent heat preservation performance, long service life, high leakage treatment efficiency and convenient installation.

Description

TECHNICAL FIELD

[0001] The application relates to an insulation layer structure with a flow guiding function for an IMO type-B tank, and belongs to the technical field of ship low-temperature liquid tanks. BACKGROUND

[0002] The ships for transporting liquefied natural gas and liquefied petroleum gas and the ships using liquefied natural gas, liquefied petroleum gas or other low-temperature liquid medium as fuel need to use special liquid tanks for loading low-temperature goods or fuel. An insulation layer is laid on the surface of the liquid tank to maintain the temperature of the liquid in the tank, and meanwhile, the insulation layer plays a heat insulation protection role on the ship body structure around the liquid tank. The low-temperature liquid tanks on the market are generally divided into type-A, type-B, type-C and film type. According to the design principle of the type-B tank, in addition to the above-mentioned heat preservation function, the design of the insulation system also needs to consider that when a through crack occurs on the periphery of the liquid tank, the low-temperature liquid can be prevented from splashing to the surface of the adjacent ship body structure to cause brittle failure of the ship body structure, and the leaked liquid can be guided to the secondary screen wall.

[0003] At present, the insulation used for the low-temperature liquid tank mainly includes two technical solutions of spray insulation and plate insulation. The plate insulation has been more practically applied in the field of type-B tanks. The gap between the innermost layer of the insulation plate and the surface of the tank body forms a flow guiding layer for the flow of the leaked liquid or gas, but there is an unclear problem of the flow guiding path for the leaked liquid. The spray insulation needs to be closely attached to the surface of the tank body, so that the flow guiding layer for containing the leaked liquid or gas is difficult to cover all ranges of the surface of the tank body, and there is a blind area for the leakage detection of the liquid tank. SUMMARY

[0004] The application aims to provide an insulation layer structure with a flow guiding function for a low-temperature liquid tank.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the application provides an insulation layer structure with a flow guiding function, which is characterized in that the insulation layer structure comprises a plurality of insulation blocks fixed on the periphery plate of the liquid tank through fixing devices, a gap is formed between the inner surface of the insulation block and the periphery plate of the liquid tank, and the innermost side of the gap between the two adjacent insulation blocks is covered by a flow guiding device fixed on the periphery plate of the liquid tank; the gap formed between the current insulation block and the periphery plate of the liquid tank is separated from the gap formed between the adjacent insulation block and the periphery plate of the liquid tank through the flow guiding device, so as to form a flow layer allowing the gas or liquid leaked when the liquid tank is damaged to enter.

[0006] The gap between the two adjacent insulation blocks is filled with a first elastic heat insulation material and a second elastic heat insulation material, wherein the gap between the lower sides of the two adjacent insulation blocks is filled with the first elastic heat insulation material, and the gap between the upper sides of the two adjacent insulation blocks is filled with the second elastic heat insulation material.

[0007] Preferably, the flow guide device is in the shape of Ω, and the two wings of the flow guide device are respectively bonded with the cutting grooves at the bottom of the two adjacent insulation blocks by low-temperature glue, the width of the cutting groove is greater than the width of the flow guide device, and the center of the flow guide device is supported by the support.

[0008] Preferably, the support comprises an upper side panel and a lower side panel, and a web plate is arranged between the upper side panel and the lower side panel, the lower side panel is welded or bonded with the liquid tank perimeter plate by low-temperature glue, and the upper side panel is welded or bonded with the inner side surface of the center of the flow guide device by low-temperature glue.

[0009] Preferably, the flow layer between the current insulation block and the liquid tank perimeter plate is in communication or not in communication with the flow layer between the adjacent insulation block and the liquid tank perimeter plate.

[0010] Preferably, when the flow layer between the current insulation block and the liquid tank perimeter plate is in communication with the flow layer between the adjacent insulation block and the liquid tank perimeter plate, a flow hole is arranged on the web plate, and the flow hole is close to the upper side panel and the lower side panel; when the flow layer between the current insulation block and the liquid tank perimeter plate is not in communication with the flow layer between the adjacent insulation block and the liquid tank perimeter plate, the web plate is a light plate without the flow hole.

[0011] Preferably, the outermost part of the second elastic thermal insulation material is covered with a sealing tape.

[0012] Preferably, the insulation block is a prefabricated integral structure, and the upper part and the lower part of the insulation block are arranged in a staggered manner, so as to form a zigzag side section; the upper part of the insulation block has the upper side surface, and the lower part of the insulation block has the lower side surface.

[0013] Preferably, the fixing device is in the shape of a convex letter, the innermost side of the fixing device is fixed on the liquid tank perimeter plate by low-temperature glue bonding or screw connection, and the outermost side of the fixing device is fixed with the insulation block by low-temperature glue bonding.

[0014] Preferably, the bottom of the insulation block is provided with a center groove matched with the fixing device.

[0015] Preferably, the fixing device comprises a pad plate and a fixing component, the thickness of the pad plate is equal to the height of the gap between the inner surface of the insulation block and the liquid tank perimeter plate, and the width of the fixing component is less than the width of the center groove.

[0016] The beneficial effects of this invention are: (1) Compared with the traditional convex plate insulating block, the gaps between the folded insulating blocks are staggered, reducing the gap area exposed to air and improving the thermal insulation performance. (2) The bottom of the gap between adjacent insulating blocks is covered by an Ω-shaped flow guiding device to form a flexible connection, which effectively reduces the influence of relative deformation between adjacent insulating blocks caused by thermal expansion and contraction, and deformation of the chamber, and improves the strength and service life of the joint of adjacent insulating blocks. (3) The flow guiding device forms a smooth flow path, which can guide the leaked liquid to the leaked liquid collection device more efficiently. (4) The support web plate under the flow guiding device can be designed with or without openings as required, so that the flow layer between the entire liquid tank boundary plate and the insulating block can be flexibly separated, and high-risk areas and low-risk areas can be managed differently, improving the efficiency and accuracy of sampling and leaking gas detection. Attached Figure Description

[0017] Figure 1 A schematic diagram showing the fixing and connection methods of the insulation layer structure;

[0018] Figure 2 This is a front view of the insulating block;

[0019] Figure 3 This is a front view of the fixing device;

[0020] Figure 4 This is a schematic diagram of the flow guiding device and support.

[0021] Figure 5 This is a longitudinal sectional view of the flow guiding device and the support.

[0022] In the attached diagram: 1-Liquid tank perimeter plate, 2-Insulating block, 3-Flow layer, 4-Fixing device, 41-Pad plate, 42-Fixing component, 5-Flow guiding device, 6-Bracket, 7-First elastic heat insulation material, 8-Second elastic heat insulation material, 9-Protective layer, 10-Sealing strip, 11-Lower side, 12-Upper side, 13-Central groove, 14-Groove, 61-Upper side panel, 62-Body plate, 63-Lower side panel, 64-Flow hole. Detailed Implementation

[0023] The sizes and proportions shown in the accompanying drawings are merely illustrative and intended to complement the descriptions herein. They are not intended to limit the implementation conditions of the invention and do not affect the effectiveness of the invention. The positional relationships such as "upper," "lower," "inner," and "outer" used in this specification are for ease of description only and are not intended to limit the scope of the invention. Changes in these relative relationships, without substantially altering the technical content, are also considered to be within the scope of the invention's implementation.

[0024] Figure 1As shown, this invention provides an insulating layer structure with a flow guiding function, comprising multiple insulating blocks 2 fixed to a liquid tank perimeter plate 1. The insulating blocks 2 are fixed by a fixing device 4 and form a gap with the liquid tank perimeter plate 1. The innermost side of the gap between two adjacent insulating blocks 2 is covered by a flow guiding device 5, thereby forming a closed flow layer 3 between the inner surface of the insulating block 2 and the liquid tank perimeter plate 1. When the liquid tank is damaged, leaked gas or liquid enters the flow layer 3, and the leak can be detected by a gas detection device.

[0025] To achieve the insulation effect, the material of the insulating block 2 includes, but is not limited to, rigid polyurethane foam or rigid polystyrene foam.

[0026] The insulating block 2 is a prefabricated integral structure, such as... Figure 1 The side profile shown is folded. Figure 2 This is a front view of a single insulating block 2. The upper and lower parts of the insulating block 2 are staggered, so a gap will be formed between two adjacent insulating blocks 2. Figure 1 The staggered connections shown effectively reduce the exposed gap area and improve the insulation effect of the insulation layer. For example... Figure 2 As shown, the bottom of the insulating block 2 has a central groove 13, which can be square. The outermost surface of the insulating block 2 is provided with a protective layer 9.

[0027] The protective layer 9 may be made of materials such as polyurea, which have good impact resistance, water resistance, wear resistance and aging resistance.

[0028] The fixing device 4 is convex in shape and includes a pad 41 and a fixing component 42. Figure 3 The front view of the fixing device is shown, and the perimeter of the pad 41 and the fixing component 42 can be square. The fixing device 4 can be bonded to the liquid tank perimeter plate 1 with low-temperature adhesive or fixed to the liquid tank perimeter plate 1 with bolts. The thickness of the pad 41 in the direction perpendicular to the liquid tank perimeter plate 1 is equal to the gap height between the insulating block 2 and the liquid tank perimeter plate. When installing the insulating block 2, align the central groove 13 of the insulating block 2 with the fixing component 42 of the fixing device 4 until the bottom of the insulating block 2 contacts the pad 41. The width of the central groove 13 should be greater than the width of the fixing component 42. The central groove 13 of the insulating block and the part of the bottom of the insulating block that contacts the fixing component 42 and the pad of the fixing device 4 are tightly bonded with low-temperature adhesive. The connection between the fixing device 4 and the insulating block 2 achieves displacement and rotation restriction in the plane parallel to the liquid tank perimeter plate 1, as well as displacement restriction perpendicular to the plane of the liquid tank perimeter plate 1, ensuring a stable connection between the insulating block 2 and the liquid tank perimeter plate 1.

[0029] The material of the fixing device 4 includes, but is not limited to, laminated wood or composite materials, which have low density, high tensile strength and shear strength under low temperature conditions.

[0030] like Figure 1 As shown, the flow guiding device 5 is Ω-shaped and extends along the length of the edge of the insulating block 2. The two wings of the flow guiding device 5 are bonded to the grooves 14 at the bottom of two adjacent insulating blocks 2 using low-temperature adhesive. The width of the grooves 14 should be greater than the width of the flow guiding device 5. Located at the bottom of the liquid tank, the flow guiding device 5 can efficiently guide leaked liquid to the leaked liquid collection device. The Ω-shaped flow guiding device 5 can effectively absorb the relative deformation between two adjacent insulating blocks 2 caused by thermal expansion and contraction and tank deformation, reducing the impact on the insulating blocks 2 and extending their service life.

[0031] The material of the flow guiding device 5 includes, but is not limited to, stainless steel, composite materials, and other materials that have good strength, elasticity, and toughness under low temperature conditions.

[0032] like Figure 4 As shown, the center of the flow guiding device 5 is supported by a bracket 6, which is arranged along the length of the flow guiding device 5. The bracket 6 includes an upper side panel 61, a web plate 62, and a lower side panel 63, which can be manufactured by welding or low-temperature adhesive bonding. The lower side panel 63 is welded or bonded to the liquid tank perimeter plate 1, and the upper side panel 61 is welded or bonded to the center of the inner side of the flow guiding device 5, thereby achieving a stable connection between the flow guiding device 5 and the liquid tank perimeter plate 1.

[0033] Figure 5 The diagram shows a side sectional view of the flow guiding device 5 and the support 6. The web plate 62 may or may not have flow holes 64. When flow holes 64 are provided, they are spaced apart and close to the upper side panel 61 and the lower side panel 63, allowing leaked gas or liquid to flow freely from any location on the surface of the liquid tank. When flow holes 64 are not provided, the web plate 62 can divide the flow layer 3 into several independent spaces. For example, some high-risk areas can be divided into a separate flow layer space, distinguishing it from the detection and management of other low-risk areas, which is beneficial for improving the efficiency and accuracy of leaked gas sampling and detection in high-risk areas.

[0034] like Figure 1 As shown, the gap between the lower sides 11 of the two insulating blocks 2 is filled with a first elastic heat insulation material 7, which is pre-bonded to the lower side 11 of one insulating block 2; the gap between the upper sides 12 of the two insulating blocks 2 is filled with a second elastic heat insulation material 8, which can be filled by on-site foaming.

[0035] The outermost exposed portion of the second elastic thermal insulation material 8 is covered with sealing tape 10.

[0036] The above embodiments are merely illustrative of the principles and effects of this invention and are not intended to limit the invention. Anyone skilled in the art can easily make various modifications to these embodiments without departing from the spirit and scope of this invention. Therefore, this invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art without departing from the technical concept disclosed herein should be within the protection scope of this invention.

Claims

1. An insulating layer structure with current-conducting function, characterized in that, It includes multiple insulating blocks fixed to the perimeter plate of the liquid tank by fixing devices. The inner surface of the insulating blocks forms a gap with the perimeter plate of the liquid tank, and the innermost side of the gap between two adjacent insulating blocks is covered by a flow guiding device fixed to the perimeter plate of the liquid tank. The gap formed between the current insulating block and the perimeter plate of the liquid tank is separated from the gap formed between the adjacent edge block and the perimeter plate of the liquid tank by the flow guiding device, thereby forming a flow layer that allows gas or liquid leaked in the event of a liquid tank rupture. The gap between two adjacent insulating blocks is filled with a first elastic heat insulation material and a second elastic heat insulation material. The gap between the lower sides of two adjacent insulating blocks is filled with the first elastic heat insulation material, and the gap between the upper sides of two adjacent insulating blocks is filled with the second elastic heat insulation material. The flow guiding device is Ω-shaped. The two wings of the flow guiding device are respectively bonded to the grooves at the bottom of two adjacent insulating blocks by low-temperature adhesive. The width of the grooves is greater than the width of the flow guiding device. The center of the flow guiding device is supported by a bracket. The support includes an upper side panel and a lower side panel, with a web between the upper and lower side panels. The lower side panel is welded to the liquid tank perimeter plate or bonded with low-temperature adhesive, and the upper side panel is welded to the center of the inner side of the flow guiding device by welding or low-temperature adhesive. The flow layer between the current insulating block and the liquid tank perimeter plate may or may not be connected to the flow layer between the adjacent insulating block and the liquid tank perimeter plate. When the flow layer between the current insulating block and the liquid tank perimeter plate is connected to the flow layer between the adjacent insulating block and the liquid tank perimeter plate, a flow hole is provided on the web, close to the upper and lower side panels. When the flow layer between the current insulating block and the liquid tank perimeter plate is not connected to the flow layer between the adjacent insulating block and the liquid tank perimeter plate, the web is a smooth plate without flow holes.

2. The insulating layer structure with current-conducting function as described in claim 1, characterized in that, The outermost exposed portion of the second elastic insulation material is covered with sealing tape.

3. The insulating layer structure with current-conducting function as described in claim 1, characterized in that, The insulating block is a prefabricated integral structure with its upper and lower parts staggered to form a folded side profile; the upper part of the insulating block has the upper side surface, and the lower part of the insulating block has the lower side surface.

4. An insulating layer structure with current-conducting function as described in claim 1, characterized in that, The fixing device has a convex-shaped structure. The innermost side of the fixing device is fixed to the perimeter plate of the liquid tank by low-temperature adhesive bonding or bolt connection, and the outermost side of the fixing device is fixed to the insulating block by low-temperature adhesive bonding.

5. An insulating layer structure with current-conducting function as described in claim 4, characterized in that, The bottom of the insulating block is provided with a central groove that cooperates with the fixing device.

6. An insulating layer structure with current-conducting function as described in claim 5, characterized in that, The fixing device includes a pad and a fixing component. The thickness of the pad is equal to the height of the gap between the inner surface of the insulating block and the perimeter plate of the liquid tank. The width of the fixing component is less than the width of the central groove.

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