Membrane plate and method for optimizing the same, and membrane container

Abstract

A membrane plate and a method for optimizing the same, and a membrane container, wherein the membrane plate comprises a plate body, the plate body is provided with a first corrugation structure, a second corrugation structure and at least one intersecting curved surface, the first corrugation structure is provided in a convex shape, the second corrugation structure is provided in a concave shape, and the first corrugation structure and the second corrugation structure are provided so as to intersect via an intersecting curved surface, a design curved surface is defined which is a curved surface structure formed by translating the first convex curve along the first concave curve and sliding the vertex of the first convex curve along the first concave curve, the first corrugation structure and the second corrugation structure intersect the design curved surface, and the intersecting lines surround it to form an intersecting curved surface.

Description

Technical Field

[0001] This application claims the priority of a Chinese patent application with the application number 202311027994.1 filed on August 15, 2023, and incorporates by reference the content disclosed in the above patent application as part of this application.

[0002] This application relates to the technical field of cryogenic storage tanks, and particularly to a membrane plate and its optimization method, as well as a membrane container.

Background Art

[0003] A membrane container, such as a membrane tank, can be used as a cryogenic storage tank to contain liquids such as cryogenic liquid hydrogen, cryogenic liquid oxygen, cryogenic LNG, cryogenic ethylene, cryogenic ethane, cryogenic liquid ammonia, cryogenic propane, cryogenic propylene, and cryogenic butane under a pressure close to atmospheric pressure.

[0004] A membrane tank generally comprises three core structures: an outer tank with high strength and rigidity, a flexible inner tank made of a metal thin film, and a heat insulation support material interposed between the inner tank and the outer tank. Here, the outer tank mainly supports the tank body and maintains the strength and rigidity of the storage tank. The heat insulation material transmits the load of the inner tank thin film to the outer tank and blocks the heat transfer between the medium and the outside. The flexible inner tank ensures the liquid tightness of the membrane tank, and the membrane plate is one of the important components constituting the flexible inner tank.

[0005] When using a material with a large linear expansion coefficient, such as stainless steel, as the material of the membrane plate of the flexible inner tank, it is necessary to consider that the metal material is adversely affected, such as causing shrinkage, elongation, and destabilization of the membrane plate due to loads such as temperature difference, hydrostatic pressure, and hydrodynamic pressure. Therefore, in order to address the above problems, it is necessary to design a plate-like structure with a plurality of arch-shaped waves.

[0006] According to conventional technology, the arched waves on some membrane plates are intermittent arched waves, meaning that the points where two waves intersect cannot be penetrated, and the ends of each arched wave can only be formed by the stretching of the material during press forming. As a result, the amount of material thinning, elongation rate, and residual stress increase, and the points where the corrugation breaks are points where stress is concentrated and the amount of material thinning is greatest, thus increasing the risk of leakage. Furthermore, the arched waves on some membrane plates are mutually orthogonal arched waves, and a complex wrinkle structure is formed at the intersection points, which increases design and manufacturing costs, makes the process difficult, and makes it difficult to quantitatively control the precision of the molding. [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] This application aims to provide a membrane plate, an optimization method thereof, and a membrane container that can solve the technical problems of increased material thinning, elongation, and residual stress, as well as the risk of leakage, that arise when using intermittent arch-shaped waves in current membrane plates, and the technical problems of increased design and manufacturing costs, high difficulty, and difficulty in controlling molding precision due to the wrinkle structure formed at the intersections when using orthogonal arch-shaped waves in membrane plates. [Means for solving the problem]

[0008] The above-mentioned objective of this application can be achieved by adopting the following technical solution.

[0009] This application provides a membrane plate in which a plate body is provided with a first corrugation structure, a second corrugation structure, and at least one intersecting curved surface, wherein the first corrugation structure is provided in a convex shape, the second corrugation structure is provided in a concave shape, and the first corrugation structure and the second corrugation structure are provided so as to intersect via an intersecting curved surface, and a design surface is defined which is a curved surface structure formed by translating the first convex curve along the first concave curve and sliding the vertex of the first convex curve on the first concave curve, the first corrugation structure and the second corrugation structure are intersectable with the design surface, and the intersecting curved surface is formed surrounded by an intersecting line.

[0010] In the embodiments of this application, both the first convex curve and the first concave curve are curves that can be fitted by Taylor's theorem.

[0011] In the embodiments of this application, the first convex curve may be a combination of one and / or at least two of the following: a parabola, a catenary, a circular arc, a trigonometric function curve, an inverse trigonometric function curve, an exponential function curve, a logarithmic function curve, and a spline curve; and the first concave curve may be a combination of one and / or at least two of the following: a parabola, a catenary, a circular arc, a trigonometric function curve, an inverse trigonometric function curve, an exponential function curve, a logarithmic function curve, and a spline curve.

[0012] In the embodiments of this application, both the first convex curve and the first concave curve are parabolas, and the intersecting surface is a hyperbolic paraboloid.

[0013] In the embodiments of this application, the first corrugation structure and the second corrugation structure are provided orthogonally or obliquely.

[0014] In embodiments of this application, the first corrugation structure comprises at least one first corrugation and at least one second corrugation connected to an intersecting surface, the second corrugation structure comprises at least one third corrugation and at least one fourth corrugation connected to an intersecting surface, the first corrugation is a surface structure formed by translating a second convex curve along a first directrix, the second corrugation is a surface structure formed by translating a third convex curve along a second directrix, the third corrugation is a surface structure formed by translating a second concave curve along a third directrix, and the fourth corrugation is a surface structure formed by translating a third concave curve along a fourth directrix.

[0015] In the embodiments of this application, the second convex curve and the third convex curve are the same as the first convex curve, and the second concave curve and the third concave curve are the same as the first concave curve.

[0016] In the embodiments of this application, the first directrix is ​​a straight line or curve located in a first plane parallel to the plate body, the second directrix is ​​a straight line or curve located in a second plane parallel to the plate body, the third directrix is ​​a straight line or curve located in a third plane parallel to the plate body, and the fourth directrix is ​​a straight line or curve located in a fourth plane parallel to the plate body.

[0017] In the embodiments of this application, the first plane and the second plane are the same plane, and the third plane and the fourth plane are the same plane.

[0018] In embodiments of this application, the first corrugation structure is a corrugation structure that extends with equal width, or the first corrugation structure comprises corrugation segments that extend while gradually shrinking or gradually expanding, and the second corrugation structure is a corrugation structure that extends with equal width, or the second corrugation structure comprises corrugation segments that extend while gradually shrinking or gradually expanding.

[0019] In an embodiment of the present application, the span ranges of both the first corrugation structure and the second corrugation structure are each 1 mm to 1000 mm.

[0020] In an embodiment of the present application, the height range of the convex portion of the first corrugation structure and the depth range of the concave portion of the second corrugation structure are each 1 mm to 500 mm.

[0021] In an embodiment of the present application, the thickness range of the plate body is 0.1 mm to 10 mm.

[0022] The present application is a method for optimizing the above-mentioned membrane plate, which includes adjusting an optimization parameter, which is at least one parameter in the mathematical formulas of the first corrugation structure, the second corrugation structure, and the intersecting surface, to change the structural parameters of the membrane plate, and obtaining the performance parameters of the membrane plate, and repeating the steps until the performance parameters reach a predetermined value, thereby providing an optimization method for the membrane plate.

[0023] In an embodiment of the present application, the mathematical formula of the intersecting surface is the mathematical equation of a hyperbolic paraboloid, and the optimization parameter includes at least one constant in the mathematical formula of the intersecting surface.

[0024] In an embodiment of the present application, the structural parameters include the size, shape, curvature, peak height of the wave, valley depth of the wave, and / or maximum span of the first corrugation structure, the second corrugation structure, and the intersecting surface.

[0025] In an embodiment of the present application, the performance parameters include the displacement compensation ability, strength, fatigue performance, and / or progressive deformation performance of the first corrugation structure, the second corrugation structure, and the intersecting surface.

[0026] In an embodiment of the present application, the step of obtaining the performance parameters of the membrane plate includes constructing a three-dimensional model of the membrane plate based on the adjusted optimization parameters and the mathematical formula of the intersecting surface, and simulating and calculating the performance parameters using the three-dimensional model of the membrane plate.

[0027] In an embodiment of the present application, after the performance parameters reach a predetermined value, it further includes steps based on the finally adjusted and determined optimization parameters and the target mathematical formula of the intersecting surface.

[0028] The present application provides a membrane container including at least one of the above membrane plates.

Advantages of the Invention

[0029] The features and advantages of the present application are as follows.

[0030] The membrane plate and the membrane container of the present application are provided with a first corrugation structure that is convex relative to the plate body, a second corrugation structure that is concave relative to the plate body, and an intersecting surface that connects the first corrugation structure and the second corrugation structure, defining a design surface formed by one convex curve and one concave curve. The first corrugation structure and the second corrugation structure intersect with the design surface to form an intersecting surface. On the one hand, the first corrugation structure, the second corrugation structure, and the intersecting surface cooperate together to enhance the displacement compensation ability of the membrane plate, which is advantageous for enhancing the liquid tightness and air tightness of the membrane container. On the other hand, the plate body reduces the elongation rate during the press forming process of the intersecting surface, reduces the forming material reduction amount and residual stress, and is advantageous for stabilizing the structural size after sizing. Furthermore, by limiting the concave curve and the convex curve, the design surface can be limited and the intersecting surface can be limited, so that the performance of the engineering structure can be optimized by adjusting the parameters of the mathematical formula, and the die processing and the press forming manufacturing of the membrane plate can be easily realized. Therefore, the design and manufacturing costs and difficulties can be reduced, and the forming precision can be easily controlled.

[0031] According to the membrane plate optimization method of this application, the performance of the membrane plate can be optimized and the performance of the membrane plate can be matched to the design requirements by adjusting the optimization parameters, using at least one parameter from the equations for the first corrugation structure, the second corrugation structure, and the intersection surface as optimization parameters, and changing the structural parameters of the membrane plate by adjusting the optimization parameters. Below, in order to more clearly explain the technical proposal according to the embodiments of this application, the drawings used in describing the embodiments are briefly described. However, the drawings described below represent only a portion of the embodiments of this application, and it goes without saying that those skilled in the art can obtain other drawings from these drawings without requiring any inventive work. [Brief explanation of the drawing]

[0032] [Figure 1] Figure 1 is a schematic perspective view of a membrane plate according to Embodiment 1 of this application. [Figure 2] Figure 2 is a schematic diagram showing the relationship between the design surface, the first convex curve, and the first concave curve according to Embodiment 1 of this application. [Figure 3] Figure 3 is a schematic diagram of the relationship between the intersecting surface and the phase intersection line according to Embodiment 1 of this application. [Figure 4] Figure 4 is a top view of a membrane plate according to Embodiment 1 of this application. [Figure 5] Figure 5 is a side view of the membrane plate according to Embodiment 1 of this application. [Figure 6] Figure 6 is a front view of the membrane plate according to Embodiment 1 of this application. [Figure 7] Figure 7 is a schematic perspective view of a membrane plate according to Embodiment 2 of this application. [Figure 8] Figure 8 is a top view of a membrane plate according to Embodiment 3 of this application. [Figure 9] Figure 9 is a schematic perspective view of the intersecting curved surface according to Embodiment 3 of this application. [Figure 10] Figure 10 is a schematic perspective view of a membrane plate according to Embodiment 4 of this application. [Figure 11]Figure 11 is a schematic perspective view of a membrane plate according to Embodiment 5 of this application. [Figure 12] Figure 12 is a schematic perspective view of a membrane plate according to Embodiment 6 of this application. [Figure 13] Figure 13 is a schematic perspective view of the design surface of the membrane plate according to Embodiment 6 of this application. [Figure 14] Figure 14 is a schematic perspective view of the intersecting curved surface according to Embodiment 6 of this application. [Figure 15] Figure 15 is a schematic perspective view of a membrane plate according to Embodiment 7 of this application. [Figure 16] Figure 16 is a schematic diagram showing the optimization design process for the intersecting surface of this application. [Figure 17] Figure 17 is a schematic partial view of the membrane container of this application. [Modes for carrying out the invention]

[0033] The technical inventions described below will be clearly and completely explained with reference to the drawings of the embodiments of this application, although these embodiments are not all embodiments, but only a selection of embodiments of this application. All other embodiments that can be obtained by those skilled in the art without requiring inventive effort based on the embodiments of this application should be understood to fall within the scope of protection of this application.

[0034] First Embodiment As shown in Figures 1, 2, and 3, the membrane plate 100 according to this application comprises a plate body 1, the plate body 1 is provided with a first corrugation structure 2, a second corrugation structure 3, and at least one intersecting curved surface 4, the first corrugation structure 2 is provided in a convex shape, the second corrugation structure 3 is provided in a concave shape, and the first corrugation structure 2 and the second corrugation structure 3 are provided so as to intersect via the intersecting curved surface 4, a design curved surface 5 is defined which is a curved surface structure formed by translating a first convex curve A1 along a first concave curve B1 and sliding the vertex of the first convex curve A1 along the first concave curve B1, the first corrugation structure 2 and the second corrugation structure 3 are intersecting with the design curved surface 5, and the intersecting curved surface 4 is formed surrounded by an intersecting line X.

[0035] Since the intersection line formed when the first corrugated structure 2 and the second corrugated structure 3 intersect with the design surface 5 is the intersecting line X, the intersecting line X between the first corrugated structure 2 and the second corrugated structure 3 and the design surface 5 is the outer contour line of the intersecting surface 4. The first corrugated structure 2 intersects with the design surface 5 along the direction of the tangent Q2 at the vertex of the first concave curve B1, and the second corrugated structure 3 intersects with the design surface 5 along the direction of the tangent Q1 at the vertex of the first convex curve A1. As a result, the displacement compensation capabilities of the first corrugated structure 2, the second corrugated structure 3 and the intersecting surface 4 cooperate more smoothly.

[0036] Furthermore, this application defines a design surface 5 formed by translating the first convex curve A1 along the first concave curve B1 and sliding the vertex of the first convex curve A1 on the first concave curve B1. However, this is merely to clearly describe the shape of the structure of the intersecting surface 4 possessed by the membrane plate 100 of this application, and the design surface 5 is not a structure possessed by the membrane plate 100 of this application. It should be understood that the intersecting surface 4, which has the same shape but a different description method, also falls within the scope of protection of this application.

[0037] Furthermore, the first corrugation structure 2 and the second corrugation structure 3 are not necessarily limited to corrugation structures that curve and extend in a specific direction. Rather, for the sake of explanation, in the case of two corrugation structures that extend along different directions and curve in opposite directions relative to the plate body 1, one is defined as the first corrugation structure 2 (for example, the wave crest structure in the drawing) and the other as the second corrugation structure 3 (for example, the wave trough structure in the drawing).

[0038] Specifically, the first corrugation structure 2 comprises at least one identical or different first corrugation 21 and at least one second corrugation 22 formed by translating at least one convex curve along at least two directrixes, and the at least one first corrugation 21 and at least one second corrugation 22 are connected to each other by at least one intersecting surface 4. The second corrugation structure 3 comprises at least one identical or different third corrugation 31 and at least one fourth corrugation 32 formed by translating at least one concave curve along at least two directrixes, and the at least one third corrugation 31 and at least one fourth corrugation 32 are connected to each other by at least one intersecting surface 4. Here, the first corrugation 21 and the second corrugation 22 intersect with the design surface 5 along the direction of the tangent Q2 at the vertex of the first concave curve B1 and connect to each other to form the first intersecting line X1 and the second intersecting line X2, respectively, and the third corrugation 31 and the third corrugation 32 intersect with the design surface 5 along the direction of the tangent Q1 at the vertex of the first convex curve A1 and connect to each other to form the third intersecting line X3 and the fourth intersecting line X4.

[0039] The membrane plate 100 of this application is provided with a plate body 1 having a relatively convex first corrugation structure 2, a relatively concave second corrugation structure 3, and an intersecting curved surface 4 connecting the first corrugation structure 2 and the second corrugation structure 3. A design curved surface 5 is defined, limited by one convex curve A1 and one concave curve B1. The first corrugation structure 2 and the second corrugation structure 3 intersect with the design curved surface 5 to form the intersecting curved surface 4. On the other hand, the first corrugation structure 2, the second corrugation structure 3, and the intersecting curved surface 4 work together to provide the displacement compensation capability of the membrane plate 100. By increasing this, it is advantageous to improve the liquid-tightness and airtightness of the membrane container. On the other hand, the plate body 1 reduces the elongation rate during press forming of the intersecting curved surface 4, reducing the amount of material loss and residual stress during forming, which is advantageous in stabilizing the structural size after shaping. Furthermore, by limiting the concave and convex curves of the design curved surface 5 and thus limiting the intersecting curved surface 4, the performance of the engineering structure can be optimized by adjusting the parameters of the mathematical formula, and mold processing and press forming manufacturing of the membrane plate can be easily realized. This reduces the design and manufacturing costs and difficulty, and makes it easy to control the precision of the forming.

[0040] Referring to Figures 2 and 3, in the embodiments of this application, the intersecting surface 4 and the design surface 5 may be exactly the same, that is, the intersecting line X between the first corrugation structure 2 and the second corrugation structure 3 and the design surface 5 can constitute the outer contour line of the design surface 5. Of course, the intersecting surface 4 may also be a part of the design surface 5.

[0041] The plate body 1 is generally a flat plate. The shape of the plate body 1 is not specifically limited, but may be formed as a square as in the embodiment of this application, or it may be a rectangle, trapezoid, triangle, arc, or other shape as in other embodiments of this application. Specifically, the thickness of the plate body 1 is in the range of 0.1 mm to 10 mm, preferably in the range of 0.1 mm to 3 mm.

[0042] Referring to Figures 4, 5, and 6, in the embodiment of this application, the center point O1 of the intersecting curved surface 4, that is, the intersection point where the vertex of the convex curve A1 and the vertex of the concave curve B1 intersect, is set to the same height as the reference point O2 on the plane of the plate body 1. When the intersecting curved surface 4 is press-formed onto the plate body 1, the elongation rate is small, reducing the amount of material loss during molding and residual stress, and the structural size after the intersecting curved surface 4 has been shaped can be made more stable. Of course, there is a possibility that differences in height may exist.

[0043] If the multiple corrugations of the first corrugation structure 2 and the multiple corrugations of the second corrugation structure 3 can all intersect with the intersecting curved surface 4, then the convex curve that defines the first corrugation structure 2, the concave curve that defines the second corrugation structure 3, the intersection angle between the first corrugation structure 2 and the third corrugation structure 3, and the distribution angles between the multiple corrugations of the first corrugation structure 2 and the distribution angles between the multiple corrugations of the second corrugation structure 3 are not specifically limited. For example, the first corrugation structure 2 and the second corrugation structure 3 are corrugation structures that extend along two linear directions, and the first corrugation structure 2 and the second corrugation structure 3 may be provided orthogonally to form roughly a "cross" shape, or they may be provided obliquely to form roughly an "X" shape.

[0044] Furthermore, as long as the first corrugation 21 and second corrugation 22 of the first corrugation structure 2, and the third corrugation 31 and fourth corrugation 32 of the second corrugation structure 3 can be connected to the intersecting curved surface 4, the number of corrugations of the first corrugation structure 2, the number of corrugations of the second corrugation structure 3, and the number of intersecting curved surfaces 4 on the plate body 1 are not specifically limited. The number of corrugations of the first corrugation structure 2 and the number of corrugations of the second corrugation structure 3 may be the same, for example, two each, and the two corrugations of the first corrugation structure 2 may be arranged along one direction and connected to the intersecting curved surface 4, while the two corrugations of the second corrugation structure 3 may be arranged along the other direction and connected to the intersecting curved surface 4. The number of corrugations in the first corrugation structure 2 and the number of corrugations in the second corrugation structure 3 may be different, and they can intersect to form a grid pattern. For example, the three corrugations of the first corrugation structure 2 may be arranged along one direction and connected to each other by two intersecting surfaces 4, and the four corrugations of the second corrugation structure 3 may form groups of two, with the corrugations of the two groups and the two intersecting surfaces 4 connected to each other. Furthermore, for example, the four corrugations of the first corrugation structure 2 may be arranged along one direction and connected to each other by three intersecting surfaces 4, and the six corrugations of the second corrugation structure 3 may form groups of two, with the corrugations of the three groups connected to the three intersecting surfaces 4.

[0045] Specifically, the first corrugation 21 is a curved surface structure formed by translating the second convex curve A2 along the first directrix Z1, the second corrugation 22 is a curved surface structure formed by translating the third convex curve A3 along the second directrix Z2, the third corrugation 31 is a curved surface structure formed by translating the second concave curve B2 along the third directrix Z3, and the fourth corrugation 32 is a curved surface structure formed by translating the third concave curve B3 along the fourth directrix Z4.

[0046] Here, the second convex curve A2 and the third convex curve A3 may be the same or different, and both the second convex curve A2 and the third convex curve A3 may be the same or different from the first convex curve A1. Similarly, the second concave curve B2 and the third concave curve B3 may be the same or different, and both may be the same or different from the first concave curve B1.

[0047] Here, the first directrix Z1 and the second directrix Z2 may be the same or different, and similarly, the third directrix Z3 and the fourth directrix Z4 may be the same or different. Furthermore, the first directrix Z1 may be a straight line or curve located in a first plane parallel to the plate body 1, the second directrix Z2 may be a straight line or curve located in a second plane parallel to the plate body 1, the third directrix Z3 may be a straight line or curve located in a third plane parallel to the plate body 1, and the fourth directrix Z4 may be a straight line or curve located in a fourth plane parallel to the plate body 1. Also, the first plane and the second plane may be the same plane or two planes with a difference in elevation above the plate body 1, and similarly, the third plane and the fourth plane may be the same plane or two planes with a difference in elevation below the plate body 1. Accordingly, the extended lengths of the first corrugation 21, the second corrugation 22, the third corrugation 31, and the fourth corrugation 32 may be specifically limited and may be the same or different.

[0048] Specifically, the span range (i.e., the width of the wave crest or wave trough) of both the first corrugation structure 2 and the second corrugation structure 3 is 1 mm to 1000 mm. The height of the convex portion of the first corrugation structure 2 relative to the plate body 1 (i.e., the height of the wave crest) and the depth of the concave portion of the second corrugation structure 3 relative to the plate body 1 (i.e., the depth of the wave trough) are both 1 mm to 500 mm.

[0049] Furthermore, the first corrugation structure 2 may be a corrugation structure that extends with equal width, that is, the convex curve defining the first corrugation structure 2 does not have to change span during translation, and the first corrugation structure 2 may be provided with corrugation segments that extend while gradually shrinking or gradually expanding, that is, the convex curve defining the first corrugation structure 2 may form corrugation segments that change gradually as the span decreases or increases during translation. Similarly, the second corrugation structure 3 may be a corrugation structure that extends with equal width, that is, the concave curve defining the second corrugation structure 3 does not have to change span during translation, or the second corrugation structure 3 may be provided with corrugation segments that extend while gradually shrinking or gradually expanding, that is, the concave curve defining the second corrugation structure 3 may form corrugation segments that change gradually as the span decreases or increases during translation.

[0050] In the embodiments of this application, in order to avoid the phenomenon of stress concentration at the connection points between the intersecting surface 4 and the first corrugation structure 2 and the second corrugation structure 3, the intersecting surface 4 is connected to the first corrugation 21 and the second corrugation 22 by a first transient surface, and the intersecting surface 4 is connected to the third corrugation 31 and the third corrugation 32 by a second transient surface. Specifically, the first transient surface comprises a first circular arc transient surface, and the second transient surface comprises a second circular arc transient surface, where the first circular arc transient surface may be a curved surface structure formed by translating a convex curve A1 along the arc, and the second circular arc transient surface may be a curved surface structure formed by translating a concave curve B1 along the arc. The intersecting surface 4 is connected to the first corrugation 21 and the second corrugation 22 at both ends in the direction of the tangent Q2 by the two first circular arc transient surfaces. The intersecting surface 4 has its ends in the direction of tangent Q1 connected to the third corrugation 31 and the fourth corrugation 32 by two second circular arc transient surfaces.

[0051] The concave and convex curves defining the intersecting surface 4, the convex curve defining the first corrugation structure 2, and the convex curve defining the second corrugation structure 3 are not specifically limited, but for the convenience of processing and design, this application provides several mathematical descriptions so that the intersecting surface 4, the first corrugation structure 2, and the second corrugation structure 3 can be accurately described by mathematical formulas, the intersecting surface 4, the first corrugation structure 2, and the second corrugation structure 3 can be precisely processed by mathematical formulas, and by adjusting the parameters in the mathematical formulas to adjust the structure of the membrane plate 100 and optimize the performance of the membrane plate 100, it is advantageous to perform operations such as modeling, stress analysis, structural design, theoretical calculation, mold processing, and press molding manufacturing for the membrane plate 100. Here, the specific optimization method will be described in the second embodiment, and will be omitted from this explanation for now.

[0052] Specifically, the concave curve A1 and convex curve B1 that define the intersecting surface 4, any of the convex curves that define the first corrugation structure 2, and any of the convex curves that define the second corrugation structure 3 can all be determined by fitting their formulas using Taylor's theorem. Taylor's theorem can be used to obtain the formulas for multiple curves, and the formulas can include those of parabolas, catenary curves, circular arcs, trigonometric functions, inverse trigonometric function curves, exponential function curves, logarithmic function curves, and spline curves, for which the formulas have already been standardized, as well as other curves for which the formulas have not been standardized.

[0053] Here, Taylor's theorem allows for the approximate representation of multiple curve functions using an n-th degree polynomial, and enables approximate fitting of curves within the domain of any of these functions within a certain range of error. For example, Taylor's theorem allows for the approximate fitting of the following representation formula to a cosine curve.

[0054]

number

[0055] Furthermore, the concave curve A1 and convex curve B1 that define the intersecting surface 4, any convex curve that defines the first corrugation structure 2, and any concave curve that defines the second corrugation structure 3 may each be one of the following: a parabola, a catenary, a circular arc, a trigonometric function curve, an inverse trigonometric function curve, an exponential function curve, a logarithmic function curve, and a spline curve (i.e., they may be curves described by a single mathematical formula), or they may be a combination of at least two (i.e., the concave curve A1 and convex curve B1 that define the intersecting surface 4, any convex curve that defines the first corrugation structure 2, and any concave curve that defines the second corrugation structure 3 may be curves formed by connecting multiple curve segments with different mathematical formulas).

[0056] Below, we provide several desirable embodiments to facilitate understanding and implementation of this application.

[0057] Embodiment 1, shown in Figures 1 to 6, is a typical and particularly desirable embodiment of the present application and has the following features.

[0058] The convex curve defining the first corrugation structure 2 and the convex curve defining the intersecting surface 4 are the same, meaning their mathematical formulas are the same. Similarly, the concave curve defining the second corrugation structure 3 and the convex curve defining the intersecting surface 4 are the same, meaning their mathematical formulas are the same. Therefore, by defining the concave and convex curves, the shapes of the first corrugation structure 2, the second corrugation structure 3, and the intersecting surface 4 can be defined, making them easier to describe mathematically and advantageous for the processing and design of the membrane plate 100.

[0059] The distribution angle between multiple corrugations in the first corrugation structure 2 and multiple corrugations in the second corrugation structure 3 is 90 degrees. That is, the axes of the first corrugation structure 2 and the axes of the second corrugation structure 3 are orthogonal to each other. The first corrugation structure 2, the second corrugation structure 3, and the intersecting curved surface 4 work together to enhance the displacement compensation capability of the membrane plate 100, thereby further improving the liquid-tightness and airtightness of the membrane container.

[0060] Intersecting surface 4 and design surface 5 have exactly the same shape, and the convex curve that defines the first corrugation structure 2, the concave curve that defines the second corrugation structure 3, and the concave and convex curves that define intersecting surface 4 are all parabolas. In other words, design surface 5 and intersecting surface 4 are the same hyperbolic paraboloid, and thus concave and convex curves can be mathematically described by simpler formulas.

[0061] Therefore, in this embodiment, the membrane plate 100 can be simplified by translating and sliding two parabolas with opposite openings along two mutually orthogonal directrixes to form a first corrugation structure 2, a second corrugation structure 3, and an intersecting curved surface 4, and finally constituting the membrane plate 100 together with the plate body 1.

[0062] Specifically, a first design directrix is ​​defined, comprising a first straight segment (i.e., the first directrix Z1), a first central curve segment (i.e., the concave curve B1), and a second straight segment (i.e., the second directrix Z2) that are connected to each other, where the first and second straight segments extend along the direction of the tangent Q2, and the first central curve segment is the same as the concave curve B1. By using the convex curve A1 as the generatrix and sequentially translating it along the first straight segment, the first central curve segment, and the second straight segment, and sliding the vertex of the convex curve on the first design directrix, the first corrugation 21, the intersecting surface 4, and the second corrugation 22 are formed in order. Similarly, a second design directrix is ​​defined, comprising a third straight segment (i.e., the third directrix Z3), a second central curve segment (i.e., the convex curve A1), and a fourth straight segment (i.e., the third directrix Z4) connected to each other, where the third and fourth straight segments extend along the tangent Q1, the second central curve segment is the same as the convex curve, and the third corrugation 31, the identical intersecting surface 4, and the fourth straight segment are sequentially translated along the third straight segment, the second central curve segment, and the fourth straight segment using the concave curve as the generatrix, and the vertex of the concave curve is slid along the second design directrix, thereby sequentially forming the third corrugation 31, the identical intersecting surface 4, and the fourth corrugation 32. The center point O1 of the intersecting surface 4 is set to be at the same height as the planar reference point O2 of the plate body 1.

[0063] Here, the formula for the intersecting surface 4 is z / h=x 2 / ay 2 It may be / b, and of course, since the form of the formula is different and the range of values ​​of the three variables x, y, and z, as well as the range of values ​​of the domain, the intersecting surface 4 can have different shapes.

[0064] The second example shown in Figure 7 has the following differences compared to the first example.

[0065] The first convex curve A1, the second convex curve A2, the third convex curve A3, the first concave curve B1, the second concave curve B2, and the third concave curve B3 are all circular arcs, that is, the first corrugation 21, the second corrugation 22, the third corrugation 31, and the fourth corrugation 32 are all parts of a cylindrical surface, and the intersecting surface 4 is part of an annular surface.

[0066] Embodiment 3, shown in Figures 8 and 9, has the following differences compared to Embodiment 1.

[0067] The distribution angle between multiple corrugations in the first corrugation structure 2 and multiple corrugations in the second corrugation structure 3 is not 90 degrees; that is, the first corrugation structure 2 and the second corrugation structure 3 are not orthogonal. Specifically, the angle between the first convex curve A1 and the first concave curve B1 is not 90 degrees.

[0068] Example 4, shown in Figure 10, has the following differences compared to Example 1.

[0069] The first corrugation structure 2 and / or the second corrugation structure 3 are not corrugation structures that extend with equal width. The first corrugation structure 2 and / or the second corrugation structure 3 are not corrugation structures that extend in a straight line. Specifically, the third corrugation 31 of the second corrugation structure 3 comprises a first equal-width corrugation segment 311 that is connected to the intersecting curved surface 4 and extends with equal width, a gradually shrinking corrugation segment 312 that is connected to the first equal-width corrugation segment 311 and extends while gradually shrinking, and a second equal-width corrugation segment 313 that is connected to the gradually shrinking corrugation segment 312 and extends with equal width, wherein the width (i.e., span) of the first equal-width corrugation segment 311 is greater than the width of the second equal-width corrugation segment 313. The second corrugation 22 of the second corrugation structure 3 is formed by translating a concave curve along a curve in a plane parallel to the plate body 1 (i.e., the fourth directrix Z4 is a curve).

[0070] Example 5, shown in Figure 11, has the following differences compared to Example 1.

[0071] The first corrugation 21 and the second corrugation 22 of the first corrugation structure 2 are not provided on the same axis, and / or the third corrugation 31 and the fourth corrugation 32 of the second corrugation structure 3 are not provided on the same axis. Specifically, the third plane parallel to the plate body 1 where the third directrix Z3 defining the third corrugation 31 is located, and the fourth plane parallel to the plate body 1 where the fourth directrix Z4 defining the fourth corrugation 32 is located, are the same plane, and the third directrix Z3 and the fourth directrix Z4 are two parallel lines in that plane. Of course, the third directrix Z3 and the fourth directrix Z4 are two parallel lines in two parallel planes, that is, there can be a difference in height between them in the thickness direction of the plate body 1.

[0072] Example 6, shown in Figures 12, 13, and 14, has the following differences compared to Example 1.

[0073] The convex curves defining the first corrugation 21, the second corrugation 22, the third corrugation 31, and / or the fourth corrugation 32 are not parabolas. The design surface 5 is a hyperbolic paraboloid. The intersecting surface 4 is not a hyperbolic paraboloid, but is part of the design surface 5. Specifically, the convex curves defining the first corrugation 21, the second corrugation 22, the third corrugation 31, and the fourth corrugation 32 all include an arc segment C1 and two parabolic segments C2 connected to both ends of the arc segment C1. The formula for the design surface 5 is z = x * y. The first corrugation 21, the second corrugation 22, the third corrugation 31, and the fourth corrugation 32 are enclosed by an intersection line X that intersects the design surface 5, forming the intersecting surface 4.

[0074] Example 7, shown in Figure 15, has the following differences compared to Example 1.

[0075] A difference in elevation exists between the center point O1 of the intersecting curved surface 4 and the planar reference point O2 of the plate body 1. Specifically, the height of the convex portion of the first corrugation structure 2 is greater than the depth of the concave portion of the second corrugation structure 3, and accordingly, the center point O1 of the intersecting curved surface 4 is located above the planar reference point O2 of the plate body 1.

[0076] Second Embodiment Referring to Figure 16, this application provides a method for optimizing the membrane plate 100, the method for optimizing the membrane plate 100 comprising the steps of adjusting the structural parameters of the membrane plate 100 by adjusting an optimization parameter which is at least one parameter in the formulas of the first corrugation structure 2, the second corrugation structure 3, and the intersecting surface 4, and obtaining performance parameters of the membrane plate 100, and repeating the above steps until the performance parameters reach a predetermined value.

[0077] In the optimization method for the membrane plate 100 of this application, at least one parameter in the formula for the intersecting surface 4 is used as an optimization parameter, and by adjusting the optimization parameter to change the structural parameters of the membrane plate 100, the performance of the membrane plate 100 can be optimized so that the performance of the membrane plate 100 meets the design requirements.

[0078] The shape of the intersecting surface 4 is determined by the first convex curve A1 and the first concave curve B1. Referring to Figures 1 to 3, in certain circumstances, the first convex curve A1 is the same as the second convex curve A2 and the third convex curve A3, and the first concave curve B1 is the same as the second concave curve B2 and the third concave curve B3, respectively. Therefore, once the formula for the intersecting surface 4 is determined, the formulas for the first convex curve A1 and the first concave curve B1 are also determined, which means the formulas for the second convex curve A2 and the third convex curve A3, and the formulas for the second concave curve B2 and the third concave curve B3 are also determined. In other words, by limiting the concave and convex curves, the three entities—the intersecting surface 4, the first corrugation structure 2, and the second corrugation structure 3—can be limited. Furthermore, by adjusting the parameters in the formula for the intersecting surface 4, the structure of the intersecting surface 4 is changed, and the structures of the first corrugation structure 2 and the second corrugation structure 3 are also changed accordingly, thereby changing the structural parameters of the membrane plate 100. As shown in Figure 15, after adjusting the optimization parameters, the shape of the intersecting surface 4 is changed to that of the intersecting surface 4', and accordingly, the first convex curve A1 is changed to the first convex curve A1', and the first concave curve B1 is changed to the first concave curve B1'.

[0079] As shown in Figures 1 to 3, in some embodiments of this application, the first convex curve A1, the second convex curve A2, the third convex curve A3, and the first concave curve B1, the second concave curve B2, and the third concave curve B3 are all parabolas. Therefore, the mathematical equation of the intersecting surface 4 is the mathematical equation of a hyperbolic paraboloid, and the optimization parameter includes at least one constant of the mathematical equation of the intersecting surface 4. Specifically, the specific mathematical equation of the intersecting surface 4 does not need to be specifically limited because it is related to the constructed reference coordinate system. In this embodiment, the mathematical equation of the intersecting surface 4 is the standard equation of a hyperbolic paraboloid, z / h=x 2 / a 2 -y2 / b 2 Here, one or more of the constants h, a, and b are selected as optimization parameters to be adjusted. For example, in the embodiment, constants h and b are constant and invariant, and only constant a is selected as the optimization parameter and adjusted. In addition, the range of values ​​for variables x, y, and z is limited in order to limit the span in both intersecting directions of the intersecting surface 4 and the depth of the recess.

[0080] For example, in another embodiment of this application, the formula for the intersecting surface 4 is as follows:

[0081]

number

[0082] Here, one or more of the constants h, v, u, a, and b can be selected as the optimization parameters to be adjusted.

[0083] In embodiments of this application, the structural parameters include the size, shape, curvature, wave crest height, wave trough depth, and / or maximum span of the first corrugation structure 2, the second corrugation structure 3, and the intersecting curved surface 4.

[0084] In embodiments of this application, the step of obtaining performance parameters of the membrane plate 100 includes the step of constructing a three-dimensional model of the membrane plate 100 based on adjusted optimization parameters and mathematical formulas for the intersecting surface 4, and the step of simulating and calculating its performance parameters using the three-dimensional model of the membrane plate 100. Here, the performance parameters include the displacement compensation capability, strength, fatigue performance, and / or progressive deformation performance of the first corrugation structure 2, the second corrugation structure 3, and the intersecting surface 4.

[0085] As can be seen from the following, this application optimizes the membrane plate 100, first obtaining performance parameters by conducting theoretical research and simulation calculations based on a three-dimensional model, and then determining whether it meets engineering requirements. Therefore, it is not necessary to first manufacture a physical membrane plate 100 and conduct experiments with it to obtain its performance parameters, or to first scan a physical membrane plate 100 using a method such as three-dimensional scanning to create a three-dimensional model, then perform operations such as model correction to obtain a three-dimensional model that closely resembles the actual membrane plate 100, and finally conduct theoretical research based on that three-dimensional model. For this reason, this application is advantageous for iterating on the membrane plate 100 because the process of optimizing the membrane plate 100 is simple and low cost, and it can better match the design requirements.

[0086] As shown in Figure 16, in the embodiment of this application, by adjusting the constant a, we obtained the intersecting surface 4 when a=1 and the intersecting surface 4' when a=0.5, respectively, and further obtained the performance parameters of the two membrane plates 100. We found that there are differences in performance such as displacement compensation capability, expressed strength, and stability that can be realized when the intersecting surfaces 4 and 4' obtained when a=1 and a=0.5 are applied to the membrane plate 100. Therefore, based on this adjustment concept, the membrane plate 100 can be optimized by adjusting the parameters of the mathematical formula so that its performance matches the engineering requirements. Furthermore, by adjusting and optimizing the parameters of the mathematical formula, the membrane plate 100 can have different performance in different directions, providing a method that is operable to meet different engineering requirements and allows for precise calculation and design. Furthermore, the main function of the membrane plate 100 according to this application is to realize displacement compensation in both intersecting directions (for example, two orthogonal directions) while maintaining a certain strength and stability. Since the amount of displacement to be compensated in both intersecting directions can be set to be the same or different according to engineering requirements, by optimizing the membrane plate 100 based on such an adjustment concept, the displacement compensation function of the membrane plate 100 in both intersecting directions can be made to meet the design requirements.

[0087] In the embodiments of this application, the process further includes the step of processing the membrane plate 100 based on the optimization parameters and target formula for the intersecting surface 4 that have been finally adjusted and determined after the performance parameters have reached predetermined values. Specifically, a press molding die is first prepared based on the optimization parameters and target formula for the intersecting surface 4 determined through adjustment, and then the plate body 1 is pressed into a membrane plate 100 having a first corrugation structure 2, a second corrugation structure 3, and an intersecting surface 4 using the press molding die.

[0088] Third Embodiment As shown in Figure 17, this application provides a membrane container comprising at least one membrane plate 100. The membrane plate 100 according to this embodiment has the same specific structure, operating principle, and beneficial effects as the membrane plate 100 of the first embodiment, so redundant explanations are omitted here. Here, the first corrugation structure 2 and the second corrugation structure 3 of the membrane plate 100 are one concave toward the inside of the tank and the other concave toward the outside of the tank.

[0089] Specifically, multiple membrane plates 100 are joined together to manufacture a flexible inner tank for a membrane container. To easily cut the membrane plates 100 according to the required shape, for example, in this embodiment, the four corners of a rectangular membrane plate 100 are cut off, but one of the edges of the membrane plate 100 may be pressed flat and then welded.

[0090] The above are merely some embodiments of this application, and those skilled in the art can make various changes or modifications to the embodiments of this application based on the information disclosed in the application, provided that they do not deviate from the spirit and scope of the invention.

Claims

1. The device comprises a plate body, the plate body being provided with a first corrugation structure, a second corrugation structure, and at least one intersecting curved surface, the first corrugation structure being convex, the second corrugation structure being concave, and the first corrugation structure and the second corrugation structure being arranged to intersect via the intersecting curved surface. A membrane plate characterized in that a design surface is defined as a curved surface structure formed by translating a first convex curve along a first concave curve and sliding the vertex of the first convex curve on the first concave curve, the first corrugation structure and the second corrugation structure are interpenetrating with the design surface, and the intersecting surface is formed by being surrounded by interpenetrating lines.

2. The membrane plate according to claim 1, characterized in that both the first convex curve and the first concave curve are curves that can be fitted by Taylor's theorem.

3. The membrane plate according to claim 1, characterized in that the first convex curve is a combination of one and / or at least two of the following: a parabola, a catenary, a circular arc, a trigonometric function curve, an inverse trigonometric function curve, an exponential function curve, a logarithmic function curve, and a spline curve, and the first concave curve is a combination of one and / or at least two of the following: a parabola, a catenary, a circular arc, a trigonometric function curve, an inverse trigonometric function curve, an exponential function curve, a logarithmic function curve, and a spline curve.

4. The membrane plate according to claim 1, characterized in that both the first convex curve and the first concave curve are parabolas, and the intersecting surface is a hyperbolic paraboloid.

5. The membrane plate according to claim 1, characterized in that the first corrugation structure and the second corrugation structure are provided orthogonally or obliquely.

6. The membrane plate according to any one of claims 1 to 5, characterized in that the first corrugation structure comprises at least one first corrugation and at least one second corrugation connected to the intersecting surface, the second corrugation structure comprises at least one third corrugation and at least one fourth corrugation connected to the intersecting surface, the first corrugation is a surface structure formed by translating a second convex curve along a first directrix, the second corrugation is a surface structure formed by translating a third convex curve along a second directrix, the third corrugation is a surface structure formed by translating a second concave curve along a third directrix, and the fourth corrugation is a surface structure formed by translating a third concave curve along a fourth directrix.

7. The membrane plate according to claim 6, wherein the second convex curve and the third convex curve are both the same as the first convex curve, and the second concave curve and the third concave curve are both the same as the first concave curve.

8. The first reference line is a straight line or curve located in a first plane parallel to the plate body, The second reference line is a straight line or curve located in a second plane parallel to the plate body, The third directrix is ​​a straight line or curve located in a third plane parallel to the plate body, The membrane plate according to claim 6, characterized in that the fourth directrix is ​​a straight line or curve located in a fourth plane parallel to the plate body.

9. The membrane plate according to claim 8, characterized in that the first plane and the second plane are coplanar, and the third plane and the fourth plane are coplanar.

10. The first corrugation structure is a corrugation structure that extends with equal width, or the first corrugation structure comprises corrugation segments that extend while gradually decreasing in size or gradually expanding in size. The membrane plate according to any one of claims 1 to 5, characterized in that the second corrugation structure is a corrugation structure that extends with equal width, or the second corrugation structure comprises corrugation segments that extend while gradually shrinking or gradually expanding.

11. The membrane plate according to claim 1, characterized in that the first corrugation structure and the second corrugation structure both have a span range of 1 mm to 1000 mm.

12. The membrane plate according to claim 1, characterized in that the height range of the convex portion of the first corrugation structure and the depth range of the concave portion of the second corrugation structure are both 1 mm to 500 mm.

13. The membrane plate according to claim 1, characterized in that the thickness range of the plate body is 0.1 mm to 10 mm.

14. A method for optimizing a membrane plate according to any one of claims 1 to 13, The steps include: adjusting the optimization parameter, which is at least one parameter in the formulas for the first corrugation structure, the second corrugation structure, and the intersecting surface, to change the structural parameters of the membrane plate; A step of obtaining the performance parameters of the membrane plate and Includes, A method for optimizing a membrane plate, characterized by repeating the above step until the performance parameter reaches a predetermined value.

15. The method for optimizing a membrane plate according to claim 14, characterized in that the formula for the intersecting surface is a mathematical equation for a hyperbolic paraboloid, and the optimization parameter includes at least one constant in the formula for the intersecting surface.

16. The method for optimizing a membrane plate according to claim 14, characterized in that the structural parameters include the first corrugation structure, the second corrugation structure, and the size, shape, curvature, wave crest height, wave trough depth, and / or maximum span of the intersecting curved surface.

17. The method for optimizing a membrane plate according to claim 14, characterized in that the performance parameters include the displacement compensation capability, strength, fatigue performance, and / or progressive deformation performance of the first corrugation structure, the second corrugation structure, and the intersecting curved surface.

18. The step of obtaining the performance parameters of the membrane plate is: The steps include constructing a three-dimensional model of the membrane plate based on the adjusted optimization parameters and the equation of the intersecting surface, The steps include: simulating and calculating the performance parameters using a three-dimensional model of the membrane plate; A method for optimizing a membrane plate according to claim 14, characterized by including the following.

19. After the performance parameter reaches a predetermined value, The method for optimizing a membrane plate according to claim 14, further comprising a step based on the optimization parameters and the target formula for the intersecting surface that have been finally adjusted and determined.

20. A membrane container characterized by comprising at least one membrane plate according to any one of claims 1 to 13.

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