A mounting structure and method for the corner area of ​​a cryogenic storage tank

Abstract

The present invention discloses a mounting structure for the angled area of ​​a cryogenic storage tank, comprising an integrated mounting assembly and a second insulating layer; the integrated mounting assembly is angled, and comprises an upper metal plate and a lower metal plate on either side of the angle, and the upper metal plate and the lower metal plate on each side are integrally connected through a supporting portion; a first insulating layer is filled between the upper metal plate and the lower metal plate; the upper metal plate is welded to the main metal plate of the bottom / wall of the storage tank to form a main shielding layer; the lower metal plate is welded to the secondary metal plate of the bottom / wall of the storage tank to form a secondary shielding layer; a stud is connected to the lower metal plate, and a mounting hole and a fixing plate are provided in the second insulating layer, and the stud passes through the mounting hole and is connected to the second insulating layer with the fixing plate. The mounting structure enables the angled area of ​​the film storage tank to have higher structural strength and better bending resistance, and has a stronger ability to resist low-temperature deformation during the actual operation of the storage tank.

Description

Technical Field

[0001] The invention relates to the technical field of liquefied gas storage containers, and in particular to an installation structure and an installation method for a corner area of ​​a cryogenic storage tank. Background Art

[0002] The wall of the cryogenic film storage container is a multi-layer structure, including an insulating layer, a shielding layer, etc. At present, for each layer of the fixing structure, it is necessary not only to provide axial tension, but also to provide a large lateral force. The above-mentioned stud fixing form is relatively easy to cope with the axial tension caused by cold shrinkage, but it is often difficult to cope with large lateral stress, and the screw used to fix the insulating layer is easy to break. Especially for liquefied gas tankers, the external environment they face is more complex and unstable than that of land-based storage tanks, and the requirements for mechanical properties are higher. Therefore, in the specific design of the main and secondary layers, the thickness of the main layer is reduced as much as possible, and the thickness of the secondary layer is increased.

[0003] In the existing solution, each layer of the film storage container is first fixed by itself in the corner area and then connected. However, when the thickness of the main layer is lower, this fixing method brings great challenges, and as the thickness is further reduced, it is more difficult to meet the conditions for stud fixing between the main and secondary layers.

[0004] In addition, the multi-layer film structure in the corner area is more difficult to install and the installation efficiency is low.

[0005] Therefore, it is necessary to provide a solution to fix the layers in the corner area of ​​the film storage container, improve the structural strength of the layers in the corner area of ​​the film storage container, and simplify the installation of the layers in the corner area. Summary of the invention

[0006] The purpose of the present invention is to fix the layers of the film storage container corner area, improve the structural strength of the layers of the film storage container corner area, and provide a more convenient installation method of the film storage tank corner area.

[0007] In order to achieve the above-mentioned purpose, the present invention provides an installation structure for the corner area of ​​a low-temperature storage tank, wherein the installation structure includes an integrated installation component and a second insulating layer; the integrated installation component is in an angle shape, and includes an upper metal plate and a lower metal plate on either side of the angle, and the upper metal plate and the lower metal plate on each side are integrally connected through a support portion; a first insulating layer is filled between the upper metal plate and the lower metal plate; the upper metal plate is welded to the main metal plate of the bottom / wall of the storage tank to form a main shielding layer; the lower metal plate is welded to the secondary metal plate of the bottom / wall of the storage tank to form a secondary shielding layer; the lower metal plate is connected to a stud, and a mounting hole and a fixing plate are provided in the second insulating layer, and the stud passes through the mounting hole and is connected to the fixing plate to connect the second insulating layer.

[0008] Preferably, the thickness of the first insulating layer and the height of the supporting portion are both within 50 mm.

[0009] Preferably, the support portion is in the shape of a strip, and its extending direction is perpendicular or parallel to the line segment formed by the folded corner.

[0010] Preferably, the area of ​​the lower metal plate is larger than that of the first insulating layer, and the edge of the lower metal plate is outside the first insulating layer.

[0011] Preferably, on one side close to the folded corner area, an edge of the upper metal plate coincides with an edge of the first insulating layer, and a first cavity is formed between the lower metal plate and the insulating layer on both sides of the folded corner.

[0012] Furthermore, the first cavity is filled with soft heat-insulating material.

[0013] Preferably, at the sides other than the sides close to the corner area, the edge of the upper metal plate is within the first insulating layer laying area.

[0014] Preferably, the material of the first insulating layer is wooden plywood.

[0015] Preferably, the lower metal plate forms a corrugated end cap structure outside the area where the first insulating layer is laid.

[0016] Preferably, the second insulating layer comprises an upper plywood layer, a polyurethane layer, and a lower plywood layer in sequence, and the fixing plate is arranged on the upper plywood layer.

[0017] Preferably, the cross-sectional area of ​​the mounting hole is larger than the cross-sectional area of ​​the stud.

[0018] The present invention also discloses a method for installing the installation structure of the corner area of ​​the low-temperature storage tank, comprising the following steps:

[0019] S1, assembling the integrated mounting assembly: filling the first insulating layer between the upper metal plate and the lower metal plate;

[0020] S2, installing the integrated mounting assembly into the insulation layer by fixing the studs to the fixing plates;

[0021] S3, the lower metal plate is welded to the secondary metal plate on the bottom / wall of the storage tank to form a secondary shielding layer;

[0022] S4, laying plywood on the secondary metal plate;

[0023] S5, welding the upper metal plate to the main metal plate on the bottom / wall of the storage tank to form a main shielding layer.

[0024] Preferably, after completing step S3, a second cavity is formed in the area below the fixing plate, and a soft heat-insulating material is filled in the second cavity.

[0025] The invention also discloses a storage tank using the above-mentioned angled area mounting structure, and the storage tank can be used for storage or transportation of liquefied gas on a liquefied gas transport ship or on land.

[0026] The beneficial effects of the present invention include:

[0027] By integrally connecting the upper metal plate and the lower metal plate, the corner area of ​​the membrane storage tank has higher structural strength and better bending resistance. During the actual operation of the tank, it has a stronger ability to resist low-temperature deformation.

[0028] By integrally connecting the upper metal plate with the lower metal plate, the integrated installation assembly used in the present invention helps to reduce on-site installation time, reduces welding workload, and the secondary shielding layer, main insulation layer, and main shielding layer in the corner area can be installed in just one time.

[0029] The upper metal plate and the lower metal plate form a step shape, which is convenient for layered welding to form two independent closed spaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the installation structure of the corner area of ​​the low-temperature storage tank of the present invention;

[0031] Figure 2 It is a schematic diagram of steps S1-S2 of the installation method of the installation structure of the corner area of ​​the low-temperature storage tank of the present invention;

[0032] Figure 3 It is a schematic diagram of step S3 of the method for installing the installation structure of the corner area of ​​a low-temperature storage tank of the present invention;

[0033] Figure 4 It is a schematic diagram of step S4 of the method for installing the installation structure of the corner area of ​​a low-temperature storage tank of the present invention;

[0034] Figure 5 It is a schematic diagram of step S5 of the method for installing the installation structure of the corner area of ​​a low-temperature storage tank of the present invention.

[0035] Figure numerals: 11-upper metal plate; 12-supporting part; 13-lower metal plate; 14-stud; 15-first insulating layer; 16-first cavity; 17-end cap; 18-secondary metal plate; 19-main metal plate; 21-upper plywood layer; 22-polyurethane layer; 23-lower plywood layer; 24-second cavity. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inside", "outside", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes, and do not refer to the limitation of time sequence, quantity, or importance. They cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, but are only for distinguishing one technical feature from another technical feature in the technical solution. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically specified. Similarly, the qualifiers similar to "one" appearing in this article do not refer to the limitation of quantity, but describe technical features that have not appeared in the previous text. Similarly, unless it is a noun modified by a specific quantitative quantifier, it should be regarded as including both singular and plural forms in this article, and the technical solution can include both singular and plural technical features. Similarly, modifiers similar to "approximately" and "approximately" appearing before the numerals in this article usually include the number itself, and their specific meanings should be understood in conjunction with the context.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Unless clearly indicated to the contrary, each aspect or embodiment defined herein may be combined with any other aspect or embodiments. In particular, any feature indicated as preferred or advantageous may be combined with any other feature indicated as preferred or advantageous.

[0041] The present invention discloses a mounting structure for a low-temperature storage tank corner region, such as Figures 1 to 5 As shown, the mounting structure includes an integrated mounting component and a second insulating layer. The integrated mounting component forms the main shielding layer, the main insulating layer, and the secondary shielding layer in the angled area of ​​the film storage tank. Therefore, the integrated mounting component is angled, and includes an upper metal plate 11 and a lower metal plate 13 on either side of the angle, and the upper metal plate 11 and the lower metal plate 13 on each side are integrally connected through a support portion 12, and the upper metal plate 11, the support portion 12, and the lower metal plate 13 are made of the same material. Due to the low temperature environment, each component in the tank will shrink, and due to the different shrinkage coefficients of each component, the stress situation in the tank will become complicated. The integrated connection of the upper metal plate 11 and the lower metal plate 13 is conducive to improving the strength of the film structure and improving the ability of the film storage tank to resist low-temperature deformation. The first insulating layer 15 is filled between the upper metal plate and the lower metal plate.

[0042] In some implementations, the first insulating layer 15 is made of plywood. The wooden plywood can support the upper metal plate 11 and has a better thermal insulation effect.

[0043] In some embodiments, the thickness of the first insulating layer 15 and the height of the support portion 12 are both within 50 mm. In this case, the distance between the upper metal plate 11 and the lower metal plate 13 is relatively close, which can reduce the stress on the upper metal plate 11, the support portion 12, and the lower metal plate 13 on the one hand, and on the other hand, since the upper metal plate 11 and the lower metal plate 13 are integrally connected through the support portion 12, the cold will be transferred from the support portion 12 to the lower metal plate 13, and the cold-keeping effect of the first insulating layer 15 will be weakened. Therefore, compared with the thickness of the main insulating layer of more than 200 mm in general, the present invention intentionally reduces the thickness of the first insulating layer 15 and thickens the second insulating layer, and the second insulating layer mainly bears the insulation effect.

[0044] The upper metal plate 11 is welded to the main metal plate 19 on the bottom / wall of the tank to form a main shielding layer, which directly contacts the liquid; the lower metal plate 13 is welded to the secondary metal plate 18 on the bottom / wall of the tank to form a secondary shielding layer.

[0045] In some embodiments, the support portion 12 is in the shape of a strip, and its extension direction is perpendicular or parallel to the line segment formed by the folded corner. Figure 1 The extending direction of the support portion 12 shown in FIG. 1 is parallel to the line segment formed by the folded corner.

[0046] In some embodiments, the area of ​​the lower metal plate 13 is larger than the first insulating layer 15, and the edge of the lower metal plate 13 is on the outside of the first insulating layer 15, which serves to leave enough space for welding the lower metal plate 13 and the secondary metal plate 18 on the bottom / wall of the tank.

[0047] In some embodiments, on one side near the corner area, the edge of the upper metal plate 11 overlaps with the edge of the first insulating layer 15. At this time, the lower metal plate 13 on both sides of the corner and the area surrounded by the first insulating layer 15 on both sides of the corner form a first cavity 16. The reason why wooden plywood is not laid in this area is to reserve a certain space for the corner area to deform when the film structure shrinks, so as to prevent excessive stress in the corner area and damage to the tank body. Furthermore, the first cavity 16 can be filled with soft insulating materials such as polyurethane or glass wool to further enhance the cold preservation effect of the film storage tank.

[0048] In some embodiments, at the edges other than the edges near the corner areas, the edges of the upper metal plate 11 are within the laying range of the first insulating layer 15 , which facilitates the subsequent laying of the main insulating layer.

[0049] In some embodiments, Figure 2 As shown, the lower metal plate 13 forms a corrugated end cap 17 outside the area where the first insulating layer 15 is laid, which is convenient for welding with the corrugated part of the secondary metal plate 18 on the bottom / wall of the tank to form a complete corrugated plate.

[0050] The lower metal plate is connected to a stud 14, and a mounting hole and a fixing plate are provided in the second insulating layer, and the stud is connected to the second insulating layer through the fixing plate. That is, the integrated mounting assembly is fixed to the second insulating layer through the stud 14 and the fixing plate. There are many specific fixing methods, which can be selected according to actual conditions.

[0051] In some embodiments, the second insulating layer comprises an upper plywood layer 21, a polyurethane layer 22, and a lower plywood layer 23. The mounting holes and the fixing plate are mounted on the upper plywood layer 21. The area below the fixing plate forms a second cavity 24. After the integrated mounting assembly is mounted on the second insulating layer, polyurethane is filled in the second cavity 24 to achieve a cold-keeping effect.

[0052] In some embodiments, the cross-sectional area of ​​the mounting hole is larger than the cross-sectional area of ​​the stud 14. Figure 1 As shown, to install the integrated mounting assembly to the second insulating layer, the size of the mounting hole must leave a certain margin so that the studs 14 on the side and bottom can be inserted into the mounting hole.

[0053] The present invention also discloses a method for installing the installation structure of the corner area of ​​the low-temperature storage tank, such as Figures 2 to 5 As shown, the following steps are included:

[0054] S1, assembling the integrated mounting assembly: filling the first insulating layer 15 between the upper metal plate and the lower metal plate;

[0055] S2, installing the integrated mounting assembly into the second thermal insulation layer by fixing the stud 14 to the fixing plate;

[0056] S3, the lower metal plate 13 is welded to the secondary metal plate 18 on the bottom / wall of the tank to form a secondary shielding layer;

[0057] S4, laying plywood on the secondary metal plate 18;

[0058] S5, welding the upper metal plate 11 to the main metal plate on the bottom / wall of the tank to form a main shielding layer;

[0059] In some implementations, after step S3 , a second cavity 24 is formed in the area below the fixing plate, and a soft heat-insulating material, such as polyurethane or glass wool, is filled in the second cavity 24 .

[0060] The present invention also discloses a storage tank using the installation structure of the angled area, and the storage tank can be used for storage or transportation of liquefied gas on a liquefied gas transport ship or on land.

[0061] In summary, the present invention connects the upper metal plate and the lower metal plate as a whole, so that the angled area of ​​the membrane storage tank has higher structural strength and better bending resistance, and has a stronger ability to resist low-temperature deformation during the actual operation of the storage tank. In addition, the present invention connects the upper metal plate and the lower metal plate as a whole, and the integrated installation assembly used in the present invention is conducive to reducing on-site installation time, with less welding workload, and the secondary shielding layer, the main insulating layer, and the main shielding layer in the angled area can be installed in one time. The upper metal plate and the lower metal plate form a step shape, which is convenient for layered welding to form two independent enclosed spaces.

[0062] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A mounting structure for the corner area of ​​a cryogenic storage tank, characterized in that: The mounting structure includes an integrated mounting component and a second insulating layer; the integrated mounting component is angled, and includes an upper metal plate and a lower metal plate on either side of the angle, and the upper metal plate and the lower metal plate on each side are integrally connected through a support portion; the upper metal plate, the support portion, and the lower metal plate are made of the same material; a first insulating layer is filled between the upper metal plate and the lower metal plate; the upper metal plate is welded to the main metal plate on the bottom / wall of the storage tank to form a main shielding layer; the lower metal plate is welded to the secondary metal plate on the bottom / wall of the storage tank to form a secondary shielding layer; a stud is connected to the lower metal plate, and a mounting hole and a fixing plate are provided in the second insulating layer, and the stud passes through the mounting hole and connects the second insulating layer with the fixing plate; on one side close to the angled area, the edge of the upper metal plate coincides with the edge of the first insulating layer, and a first cavity is formed between the lower metal plate and the insulating layer on both sides of the angled area, and the first cavity is filled with soft thermal insulation material.

2. The installation structure of the corner area of ​​the low-temperature storage tank according to claim 1, characterized in that: The thickness of the first insulating layer and the height of the supporting portion are both within 50 mm.

3. The installation structure of the corner area of ​​the low-temperature storage tank according to claim 1, characterized in that: The support portion is in the shape of a strip, and its extending direction is perpendicular or parallel to the line segment formed by the folded angle.

4. The installation structure of the corner area of ​​the low-temperature storage tank according to claim 1, characterized in that: The area of ​​the lower metal plate is larger than that of the first insulating layer, and the edge of the lower metal plate is outside the first insulating layer.

5. The installation structure of the corner area of ​​the low-temperature storage tank according to claim 1, characterized in that: At other sides except the sides close to the corner area, the edge of the upper metal plate is within the first insulating layer laying area.

6. The installation structure of the corner area of ​​the low-temperature storage tank according to claim 1, characterized in that: The first insulating layer is made of plywood.

7. The installation structure of the corner area of ​​the low-temperature storage tank according to claim 1, characterized in that: The lower metal plate forms a corrugated end cap structure outside the area where the first insulating layer is laid.

8. The installation structure of the corner area of ​​the cryogenic storage tank according to claim 1, characterized in that: The second insulating layer comprises an upper plywood layer, a polyurethane layer, and a lower plywood layer in sequence, and the fixing plate is arranged on the upper plywood layer.

9. The installation structure of the corner area of ​​the low-temperature storage tank according to claim 1, characterized in that: The cross-sectional area of ​​the mounting hole is larger than the cross-sectional area of ​​the stud.

10. The method for installing the installation structure of the corner area of ​​a low-temperature storage tank according to any one of claims 1 to 9, characterized in that: The following steps are included: S1, assembling the integrated mounting assembly: filling the first insulating layer between the upper metal plate and the lower metal plate; S2, installing the integrated mounting assembly into the second insulating layer by fixing the studs to the fixing plate; S3, the lower metal plate is welded to the secondary metal plate on the bottom / wall of the storage tank to form a secondary shielding layer; S4, laying plywood on the secondary metal plate; S5, welding the upper metal plate to the main metal plate on the bottom / wall of the storage tank to form a main shielding layer.

11. The installation method according to claim 10, characterized in that: After completing step S3, a second cavity is formed in the area below the fixing plate, and a soft heat-insulating material is filled in the second cavity.

12. A storage tank using the installation structure of the angled area according to any one of claims 1 to 9, characterized in that: The storage tank is used for storing or transporting liquefied gas on a liquefied gas transport ship or on land.

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