LNG ship liquid cargo tank bottom fixing tool
By setting fixed and semi-fixed support seats at the bottom of the LNG ship cargo tank, the problem of welding fixation and bottom shelving side unidirectional fixation in the prior art cannot release the shrinkage stress, and the low-temperature deformation of the bottom of the cargo tank is achieved The effective release of centripetal contraction and cold shrink tensile stress extends the service life of the liquid cargo tank and improves safety.
Patent Information
- Application Number
- CN202411238329.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2024-12-10
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing methods for fixing the bottom of LNG ship cargo tanks such as welding fixing and bottom shelving side one-way fixing cannot effectively release the cold shrinkage stress caused by low-temperature LNG cargo, and it is difficult to control the gap and deformation of the support points.
Fixed tooling including a fixed support seat and a semi-fixed support seat is adopted. The fixed support seat is arranged in the center of the bottom of the liquid cargo tank. The semi-fixed support seat is radially distributed around the fixed support seat, and the bottom of the liquid cargo tank is released by sliding. low temperature cold shrink tensile stress.
Effectively guide the low-temperature deformation and centripetal contraction at the bottom of the liquid cargo tank, release the shrinkage tensile stress through slippage, extend the service life of the liquid cargo tank and improve safety.
Smart Images
Figure CN119099793A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of shipbuilding, and in particular to a bottom fixing tool for a liquid cargo tank of an LNG ship. Background Art
[0002] At present, the commonly used methods for fixing the bottom of independent liquid cargo tanks on LNG ships are welding or one-way fixing on the bottom side. Welding is not conducive to releasing the low-temperature shrinkage stress caused by loading low-temperature LNG cargo in the cargo hold; the one-way fixing on the bottom side is not easy to control the gap and deformation of the supporting points. Summary of the invention
[0003] (1) Technical issues to be solved
[0004] The present application provides a bottom fixing tool for a liquid cargo tank of an LNG carrier, which solves the problem that welding fixing is not conducive to releasing the low-temperature shrinkage stress caused by loading low-temperature LNG cargo in the cargo hold.
[0005] (2) Technical solution
[0006] The present application provides a bottom fixing tool for a liquid cargo tank of an LNG ship, comprising a fixed support seat and a plurality of semi-fixed support seats, wherein the fixed support seat is arranged at the center of the bottom of the liquid cargo tank, and the plurality of semi-fixed support seats are slidably arranged on the bottom of the liquid cargo tank and are radially distributed around the fixed support seat; the fixed support seat is used to fix the bottom of the liquid cargo tank to guide the low-temperature deformation of the bottom of the liquid cargo tank to contract centripetally; the semi-fixed support seat is used to release the low-temperature shrinkage tensile stress of the bottom of the liquid cargo tank by sliding.
[0007] Furthermore, the fixed support seat includes a first support member and a second support member, the first support member is connected to the bottom center of the liquid cargo tank, and the second support member is connected to a corresponding position of the liquid cargo tank.
[0008] Furthermore, the first support member includes a first support plate and a first support tube vertically connected to the first support plate, and the second support member includes a second support plate and a second support tube vertically connected to the second support plate; the first support tube is inserted into the second support tube.
[0009] Furthermore, the first supporting tube and the second supporting tube are interference fit.
[0010] Furthermore, the semi-fixed support seat includes a third support member and a fourth support member that can slide relative to each other, the third support member is connected around the bottom of the liquid cargo tank, and the fourth support member is connected to a corresponding position of the liquid cargo tank.
[0011] Further, the third support member includes a third support plate and a fourth support plate vertically connected to the third support plate, and the fourth support member includes a fifth support plate and two sixth support plates vertically connected to the fifth support plate; a groove is formed between the two sixth support plates, and the fourth support plate is inserted into the groove and can slide along the groove.
[0012] Furthermore, the fourth support plate is clearance-matched with the groove.
[0013] Furthermore, the sliding direction of each of the semi-fixed support seats points to the bottom center of the liquid cargo tank.
[0014] Furthermore, the fixed support seats are provided in one group, and the semi-fixed support seats are provided in eight groups and are symmetrically arranged.
[0015] (3) Beneficial effects
[0016] The above technical solution of the present application has the following advantages:
[0017] The bottom fixing tooling of the LNG ship liquid cargo tank provided in the present application has the center of the bottom of the liquid cargo tank constrained by a fixed support seat, and the surrounding low-temperature shrinkage deformation is all directed to the center. When low-temperature shrinkage occurs at the bottom of the liquid cargo tank, the semi-fixed support seat can slide to release the low-temperature shrinkage tensile stress, which is beneficial to prolonging the service life of the independent liquid cargo tank of the LNG ship and improving its safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0019] Figure 1 Schematic diagram of the bottom fixing tooling of the LNG carrier liquid cargo tank provided for this application;
[0020] Figure 2 A schematic diagram of a fixed support base provided for this application;
[0021] Figure 3 A front view of the semi-fixed support provided for this application;
[0022] Figure 4 A side view of the semi-fixed support base provided in this application.
[0023] Figure numerals: 1. Fixed support seat; 11. First support member; 111. First support plate; 112. First support cylinder; 12. Second support member; 121. Second support plate; 122. Second support cylinder; 2. Semi-fixed support seat; 21. Third support member; 211. Third support plate; 212. Fourth support plate; 22. Fourth support member; 221. Fifth support plate; 222. Sixth support plate; 3. Bottom of liquid cargo tank. DETAILED DESCRIPTION
[0024] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0025] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0026] 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 or an electrical 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.
[0027] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.
[0028] The present application provides a bottom fixing tool for a liquid cargo tank of an LNG ship, which aims to reduce the cold shrinkage stress caused by the bottom of an independent liquid cargo tank after loading low-temperature LNG cargo. It is suitable for liquid cargo tanks of LNG transport ships, LNG fuel tanks of other ships, and land LNG storage tanks, etc.
[0029] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not intended to limit the scope of the present application.
[0030] The present application embodiment provides a bottom fixing tool for a LNG ship liquid cargo tank, such as Figure 1 As shown, it includes a fixed support seat 1 and a plurality of semi-fixed support seats 2, the fixed support seat 1 is arranged at the center of the bottom 3 of the liquid cargo tank, and the plurality of semi-fixed support seats 2 are slidably arranged on the bottom 3 of the liquid cargo tank and are radially distributed around the fixed support seat 1; the fixed support seat 1 is used to fix the bottom 3 of the liquid cargo tank to guide the low-temperature deformation of the bottom 3 of the liquid cargo tank to shrink centripetally; the semi-fixed support seat 2 is used to release the low-temperature shrinkage tensile stress of the bottom 3 of the liquid cargo tank by sliding.
[0031] In some embodiments, Figure 2 As shown, the fixed support seat 1 includes a first support member 11 and a second support member 12, the first support member 11 is connected to the center of the bottom 3 of the liquid cargo tank, and the second support member 12 is connected to the corresponding position of the liquid cargo tank.
[0032] In some embodiments, Figure 2 As shown, the first support member 11 includes a first support plate 111 and a first support tube 112 vertically connected to the first support plate 111, and the second support member 12 includes a second support plate 121 and a second support tube 122 vertically connected to the second support plate 121; the first support tube 112 is inserted into the second support tube 122.
[0033] In some embodiments, the first support tube 112 and the second support tube 122 are interference fit.
[0034] In some embodiments, Figure 3 and Figure 4 As shown, the semi-fixed support seat 2 includes a third support member 21 and a fourth support member 22 which can slide relative to each other, the third support member 21 is connected around the bottom 3 of the liquid cargo tank, and the fourth support member 22 is connected to the corresponding position of the liquid cargo tank.
[0035] In some embodiments, Figure 3 and Figure 4As shown, the third support member 21 includes a third support plate 211 and a fourth support plate 212 vertically connected to the third support plate 211, and the fourth support member 22 includes a fifth support plate 221 and two sixth support plates 222 vertically connected to the fifth support plate 221; a groove is formed between the two sixth support plates 222, and the fourth support plate 212 is inserted into the groove and can slide along the groove.
[0036] In some embodiments, the fourth support plate 212 is loosely matched with the groove.
[0037] In some embodiments, the sliding direction of each of the semi-fixed support seats 2 points to the center of the bottom 3 of the liquid cargo tank.
[0038] In some embodiments, the fixed support base 1 is provided in one group, and the semi-fixed support base 2 is provided in eight groups and arranged symmetrically.
[0039] In application, the bottom fixing tooling of the LNG ship liquid cargo tank includes a bottom center fixed support seat and a semi-fixed support seat radially and centripetally distributed around the bottom. Both types of support seats fix the bottom of the liquid cargo tank at the same time.
[0040] The fixed support seat realizes full fixed constraint by a pair of cylinders with interference fit of inner and outer diameters, and the semi-fixed support seat distributed radially and centripetally around the bottom realizes non-centripetal constraint by a pair of support blocks with grooves and convex grooves respectively distributed in the direction of the centripetal vector.
[0041] The fixed support seat is arranged at the centroid of the bottom of the independent liquid cargo tank of the LNG ship, and the bottom of the fixed liquid cargo tank is arranged at the centroid of the bottom to guide the centripetal contraction of the low-temperature deformation of the bottom of the liquid cargo tank.
[0042] The semi-fixed support seats are arranged around the central fixed support seat, and the sliding directions of all the semi-fixed support seats are kept pointing to the bottom centroid of the independent liquid cargo tank of the LNG ship. The tensile stress can be released by sliding when the bottom of the liquid cargo tank is deformed by low temperature shrinkage.
[0043] Because the centroid of the bottom of the liquid cargo tank is constrained by the fixed support seat, the surrounding low-temperature shrinkage deformation all points to the centroid. By aligning the sliding direction of each semi-fixed support seat with the centroid, when low-temperature shrinkage occurs at the bottom of the liquid cargo tank, the upper part of the semi-fixed support seat can slide centripetally to release the low-temperature shrinkage tensile stress.
[0044] The support and fixing form has a simple structure and is easy to install. It can be used in working scenarios where the supported and fixed structure will undergo large deformation, including but not limited to LNG transport ships with independent liquid cargo tanks, LNG fuel tanks, LNG land storage tanks, etc.
[0045] like Figure 2As shown, the fixed support seat 1 includes a first support member 11 and a second support member 12; the first support member 11 is welded at the centroid position of the bottom of the liquid cargo tank, and the second support member 12 is welded at the centroid position of the bottom of the liquid cargo tank (inner shell); the two are embedded up and down during installation, with interference fit, which can play a fixed restraining role on the liquid cargo tank.
[0046] like Figure 3 and Figure 4 As shown, the semi-fixed support seat 2 includes a third support member 21 and a fourth support member 22; the third support member 21 is welded around the bottom of the liquid cargo tank, and the fourth support member 22 is welded around the bottom of the liquid cargo tank (inner shell); the two are embedded up and down during installation, and the clearance fit can play a role in fixing and restraining the liquid cargo tank in a non-centripetal direction, and can release the low-temperature shrinkage deformation of the bottom of the liquid cargo tank through relative sliding.
[0047] like Figure 1 As shown, the fixed support seat 1 is arranged at the centroid position of the bottom of the liquid cargo tank, and the semi-fixed support seat 2 is arranged around the bottom of the liquid cargo tank. The sliding directions of all the semi-fixed support seats 2 are kept coincident with the centroid line, and the low-temperature shrinkage deformation of the bottom of the liquid cargo tank is released by centripetal sliding.
[0048] In this embodiment, one group of fixed support seats is provided, and eight groups of semi-fixed support seats are provided and arranged symmetrically. The specific number of settings can be adjusted according to the size of the liquid cargo tank.
[0049] The bottom fixing fixture of the LNG ship liquid cargo tank provided in the present application has a simple design structure, uniform distribution, strong bearing capacity, can effectively release the low-temperature shrinkage tensile stress at the bottom of the liquid cargo tank, improve the fatigue strength and service life of the liquid cargo tank structure, and can also ensure safety.
[0050] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application.
[0051] It should be clear that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. For the embodiments of the method, the relevant parts can refer to the partial description of the device embodiment (adopted according to the writing situation). The present application is not limited to the specific steps and structures described above and shown in the figures. In addition, for the sake of simplicity, a detailed description of known method technologies is omitted here.
[0052] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.
Claims
1. A bottom fixing tool for a LNG ship liquid cargo tank, characterized in that: It comprises a fixed support seat and a plurality of semi-fixed support seats, wherein the fixed support seat is arranged at the center of the bottom of the liquid cargo tank, and the plurality of semi-fixed support seats are slidably arranged at the bottom of the liquid cargo tank and are radially distributed around the fixed support seat; the fixed support seat is used to fix the bottom of the liquid cargo tank to guide the low-temperature deformation of the bottom of the liquid cargo tank to contract centripetally; the semi-fixed support seat is used to release the low-temperature shrinkage tensile stress of the bottom of the liquid cargo tank by sliding.
2. The bottom fixing tool for the LNG carrier liquid cargo tank according to claim 1, characterized in that: The fixed support seat includes a first support member and a second support member, the first support member is connected to the center of the bottom of the liquid cargo tank, and the second support member is connected to a corresponding position of the liquid cargo tank.
3. The bottom fixing tool for the LNG ship liquid cargo tank according to claim 2, characterized in that: The first support member includes a first support plate and a first support tube vertically connected to the first support plate, and the second support member includes a second support plate and a second support tube vertically connected to the second support plate; the first support tube is inserted into the second support tube.
4. The bottom fixing tool for the LNG ship liquid cargo tank according to claim 3, characterized in that: The first supporting tube and the second supporting tube are interference fit.
5. The bottom fixing tool for the LNG carrier liquid cargo tank according to claim 1, characterized in that: The semi-fixed support seat includes a third support member and a fourth support member that can slide relative to each other, the third support member is connected around the bottom of the liquid cargo tank, and the fourth support member is connected to a corresponding position of the liquid cargo tank.
6. The bottom fixing tool for the LNG carrier liquid tank according to claim 5, characterized in that: The third support member includes a third support plate and a fourth support plate vertically connected to the third support plate, and the fourth support member includes a fifth support plate and two sixth support plates vertically connected to the fifth support plate; a groove is formed between the two sixth support plates, and the fourth support plate is inserted into the groove and can slide along the groove.
7. The bottom fixing tool for the LNG carrier liquid tank according to claim 6, characterized in that: The fourth supporting plate is loosely matched with the groove.
8. The bottom fixing tool for the LNG carrier liquid cargo tank according to claim 1, characterized in that: The sliding direction of each of the semi-fixed support seats points to the bottom center of the liquid cargo tank.
9. The bottom fixing tool for the LNG carrier liquid tank according to claim 1, characterized in that: The fixed support seats are provided in one group, and the semi-fixed support seats are provided in eight groups and are symmetrically arranged.