1. A method for determining a hoisting scheme of a rhombic liquid tank is characterized by comprising the following steps:

s1, acquiring the weight, the gravity center, the size and the structural form of the rhombic liquid tank;

s2, selecting a proper gantry crane according to the weight, the gravity center and the size of the rhombic liquid tank, wherein the gantry crane is provided with two upper trolleys, each upper trolley is provided with two main lifting hooks, and each main lifting hook is provided with a lifting row; determining the lifting and hoisting coverage range of the gantry crane according to the positions of the four hoisting rows;

s3, constructing a hoisting scheme, wherein the construction of the hoisting scheme mainly comprises the following steps:

(1) determining the number, specification and arrangement position of the hoisting horses connected to each hoisting row according to the hoisting coverage, the structural characteristics of the hoisting rows and the arrangement position of the floating stopping device on the rhombic liquid tank in combination with the weight and the gravity center of the rhombic liquid tank; the lifting horse is obtained by arranging a lifting horse hole on the floating stop device; when the hanging horses are arranged, all the hanging horses are required to be symmetrical front and back and left and right relative to the gravity center of the rhombic liquid tank, so that the stress of each hanging horse is uniform; the specifications of the hanging horse are two types: the first type is a single lifting lug structure, and the single lifting lug structure is obtained by arranging a lifting lug hole on a main plate of the floating stopping device; the second type is a three-lifting-lug structure, which is obtained by respectively arranging a lifting lug hole on a main plate of the floating stopping device and toggle plates on the left side and the right side of the main plate;

(2) acquiring the inclination angle of a steel wire rope between each hanging horse and the corresponding hanging row according to the arrangement position of each hanging horse and the position of the corresponding hanging row, and further calculating and determining the stress condition of each hanging horse through a static balance formula; the inclination angle of the steel wire rope is an included angle between the steel wire rope and the horizontal plane;

(3) according to the stress condition of each hanging horse, whether the stress of each hanging horse meets the requirement is approved; if the requirements are met, determining the connection form of each lifting hole and the corresponding lifting row of the lifting horse, further calculating the stress of each horse lifting hole of the lifting horse, and if the requirements are not met, correcting the steps (1) to (2) until the stress of each horse lifting is met;

s4, establishing a finite element model when the rhombic liquid tank is hoisted according to a structural drawing of the rhombic liquid tank and the constructed hoisting scheme;

s5, applying stress corresponding to a lifting eye at the lifting eye position of the established finite element model, wherein the application direction is the length direction of the corresponding steel wire rope, and then calculating the stress and deformation condition of the diamond-shaped liquid tank in the lifting process;

s6, approving whether the stress and deformation conditions of the diamond-shaped liquid tank meet requirements or not, and if so, determining a final hoisting scheme; if the stress distribution and the deformation condition are not met, optimizing the hoisting scheme according to the obtained stress distribution and deformation condition, and carrying out finite element analysis calculation and approval on the optimized hoisting scheme again until the optimized hoisting scheme meets the requirements; the optimization of the hoisting scheme comprises optimization of the arrangement of the hoisting horses and/or optimization of local reinforcement.

2. The method for determining the hoisting scheme of the diamond-shaped liquid tank as claimed in claim 1, wherein in S1, the weight of the diamond-shaped liquid tank comprises a structure weight, a welding weight, an insulation weight, a paint weight, a piping weight, an outfitting weight and other pre-estimated weights.

3. The method for determining the hoisting scheme of the diamond-shaped liquid tank as claimed in claim 1 or 2, wherein ShipRight FastTrack software is used for finite element modeling and finite element hoisting calculation of the diamond-shaped liquid tank, during finite element modeling, a main body structure of the diamond-shaped liquid tank is constructed by a large number of quadrilateral plate shell units and a small number of triangular units, a reinforcing structure is constructed by plate units or beam units, the grid sizes of the main body structure and the reinforcing structure are rib spacing x longitudinal bone spacing, and the grid size of a key investigation part needs to be further refined to be 50mm x 50 mm.

4. The method for determining the hoisting scheme of the diamond-shaped liquid tank as claimed in claim 1, wherein the hoisting rows of the gantry crane are triangular hoisting rows, two pulleys are arranged on each triangular hoisting row, each pulley is wound by a main steel wire rope, each main steel wire rope has two rope ends, and each rope end is connected with a main shackle; in S3, when a horse with a three-shackle structure is selected, each horse connects three horse lifting holes of the horse lifting device with the same main shackle on the corresponding main wire rope through one auxiliary wire rope, and the specific connection mode is as follows: one rope end of the auxiliary steel wire rope is connected with a hanging scaffold hole on a left toggle plate of the hanging scaffold, and the other rope end of the auxiliary steel wire rope sequentially penetrates through the main shackle, the hanging scaffold hole on the main hanging scaffold plate and the main shackle and then is connected with the hanging scaffold hole on the right toggle plate.

Background

In the construction process of a liquefied gas ship, a rhombic liquid tank is taken as a typical liquid tank form, and due to special construction requirements, a gantry crane is needed to hoist the air inlet canopy for insulation construction, the gantry crane is adopted to hoist the module vehicle after insulation is finished, the module vehicle is refuted and transported to a shipway, and finally the main hull is hoisted to install the liquid tank. However, the diamond-shaped liquid tank is large in weight and size, so that the diamond-shaped liquid tank is easy to deform during hoisting, and hoisting safety and construction precision are affected.

Traditional rhombus fluid reservoir hoist and mount all are according to experience, not only lack the precision, and it is unreasonable that probably to appear hanging the horse in the hoist and mount process moreover, and the fluid reservoir slope, perhaps because hang the regional relevant reinforcing of horse and lead to the great condition of structural deformation and stress inadequately, need hang the horse again after secondary arrangement and the structural optimization, can consume a large amount of manpower and materials. In addition, the hoisting scheme according to the experience method usually adopts a large safety factor to ensure safety at present, and the problem of insufficient application of the hoisting capacity of the selected hoisting equipment can be caused, so that the hoisting resources are wasted.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a method for determining a hoisting scheme of a rhombic liquid tank, which is characterized in that finite element software is used for analyzing and calculating the constructed hoisting scheme, and the constructed hoisting scheme is continuously optimized according to an analysis and calculation result until the obtained hoisting scheme ensures that the stress and deformation during hoisting meet requirements, so that a theoretical basis is provided for actual hoisting, and the problems of long hoisting time and hoisting resource waste caused by repeatedly modifying the hoisting scheme in the actual hoisting process are effectively solved.

In order to achieve the above objects and other related objects, the present invention provides a method for determining a hoisting scheme for a diamond-shaped liquid tank, comprising the steps of:

s1, acquiring the weight, the gravity center, the size and the structural form of the rhombic liquid tank;

s2, selecting a proper gantry crane according to the weight, the gravity center and the size of the rhombic liquid tank, wherein the gantry crane is provided with two upper trolleys, each upper trolley is provided with two main lifting hooks, and each main lifting hook is provided with a lifting row; determining the lifting and hoisting coverage range of the gantry crane according to the positions of the four hoisting rows;

s3, constructing a hoisting scheme, wherein the construction of the hoisting scheme mainly comprises the following steps:

(1) determining the number, specification and arrangement position of the hoisting horses connected to each hoisting row according to the hoisting coverage, the structural characteristics of the hoisting rows and the arrangement position of the floating stopping device on the rhombic liquid tank in combination with the weight and the gravity center of the rhombic liquid tank; the lifting horse is obtained by arranging a lifting horse hole on the floating stop device; when the hanging horses are arranged, all the hanging horses are required to be symmetrical front and back and left and right relative to the gravity center of the rhombic liquid tank, so that the stress of each hanging horse is uniform; the specifications of the hanging horse are two types: the first type is a single lifting lug structure, and the single lifting lug structure is obtained by arranging a lifting lug hole on a main plate of the floating stopping device; the second type is a three-lifting-lug structure, which is obtained by respectively arranging a lifting lug hole on a main plate of the floating stopping device and toggle plates on the left side and the right side of the main plate;

(2) acquiring the inclination angle of a steel wire rope between each hanging horse and the corresponding hanging row according to the arrangement position of each hanging horse and the position of the corresponding hanging row, and further calculating and acquiring the stress condition of each hanging horse through a static balance formula; the inclination angle of the steel wire rope is an included angle between the steel wire rope and the horizontal plane;

(3) according to the stress condition of each hanging horse, whether the stress of each hanging horse meets the requirement is approved; if the requirements are met, determining the connection form of each lifting hole and the corresponding lifting row of the lifting horse, further calculating the stress of each horse lifting hole of the lifting horse, and if the requirements are not met, correcting the steps (1) to (2) until the stress of each horse lifting is met;

s4, establishing a finite element model when the rhombic liquid tank is hoisted according to a structural drawing of the rhombic liquid tank and the constructed hoisting scheme;

s5, applying stress corresponding to a lifting eye at the lifting eye position of the established finite element model, wherein the application direction is the length direction of the corresponding steel wire rope, and then calculating the stress and deformation condition of the diamond-shaped liquid tank in the lifting process;

s6, approving whether the stress and deformation conditions of the diamond-shaped liquid tank meet requirements or not, and if so, determining a final hoisting scheme; if the stress distribution and the deformation condition are not met, optimizing the hoisting scheme according to the obtained stress distribution and deformation condition, and carrying out finite element analysis calculation and approval on the optimized hoisting scheme again until the optimized hoisting scheme meets the requirements; the optimization of the hoisting scheme comprises optimization of the arrangement of the hoisting horses and/or optimization of local reinforcement.

Preferably, in S1, the weight of the diamond-shaped liquid tank includes a structure weight, a welding weight, an insulation weight, a paint weight, a piping weight, an outfitting weight, and other pre-estimated weights.

Preferably, ShipRight FastTrack software is used for carrying out finite element modeling and finite element hoisting calculation on the rhombic liquid tank, when the finite element modeling is carried out, a main body structure of the rhombic liquid tank is constructed by a large number of quadrilateral plate shell units and a small number of triangular units, a reinforcing structure is constructed by plate units or beam units, the mesh size of the main body structure and the reinforcing structure part is rib spacing multiplied by longitudinal bone spacing, and the mesh size of a key investigation part needs to be further refined to be 50mm multiplied by 50 mm.

Preferably, the hoisting row of the gantry crane is a triangular hoisting row, two pulleys are arranged on the triangular hoisting row, each pulley is wound with a main steel wire rope, and each main steel wire rope is provided with two rope ends; each rope head is connected with a main shackle; in S3, when a horse with a three-shackle structure is selected, each horse connects three horse lifting holes of the horse lifting device with the same main shackle on the corresponding main wire rope through one auxiliary wire rope, and the specific connection mode is as follows: one rope end of the auxiliary steel wire rope is connected with a hanging scaffold hole on a left toggle plate of the hanging scaffold, and the other rope end of the auxiliary steel wire rope is connected with a hanging scaffold hole on a right toggle plate after sequentially bypassing the main shackle, the hanging scaffold hole on the main hanging scaffold plate and the main shackle.

As above, the method for determining the hoisting scheme of the diamond-shaped liquid tank of the invention has the following beneficial effects:

according to the method for determining the hoisting scheme of the rhombic liquid tank, finite element simulation calculation is carried out on the preliminarily determined hoisting scheme before actual hoisting of an engineering, the hoisting scheme is continuously optimized according to the calculation result until the hoisting scheme meeting the requirements on stress and deformation is obtained, and theoretical support is provided for actual hoisting; according to the invention, the optimization of the hoisting scheme in the actual hoisting process is advanced to the front of the actual hoisting, so that the workload of workers is greatly reduced, the actual hoisting time is shortened, and meanwhile, the hoisting resources and the long-time occupation of a dock are avoided, thereby shortening the building period of the dock and improving the building efficiency.

Drawings

Fig. 1 is a perspective view of a diamond-shaped liquid tank.

Figure 2 is a schematic view of the hoisting arrangement when a three-lifting-lug structure is adopted for hoisting a horse,

fig. 3 is a schematic diagram of a three-lifting-lug-structure lifting horse formed by a main plate and a toggle plate lifting horse hole of the floating stopping device.

Fig. 4 is a schematic flow chart of the method for determining the hoisting scheme of the diamond-shaped liquid tank.

Description of the reference numerals

Rhombus fluid reservoir 01, upper sloping plate 02, float-stopping device 03, mainboard 031, bracket 032, hang horse hole 033, main lifting hook 1, hang and arrange 2, pulley 21, main wire rope 3, main shackle 4, vice wire rope 5, first pair of shackles 6, the vice shackle 7 of second.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Please refer to fig. 1 to 4. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

When the hull moves down, rhombus fluid reservoir 01 can be at the upward movement of inertial effect down for rhombus fluid reservoir 01 top and hull structure bump, damage rhombus fluid reservoir 01 and hull because of the collision in order to prevent, can set up the floating stopping device 03 that plays the cushioning effect between rhombus fluid reservoir 01 and hull.

As shown in fig. 1, two rows of the floating stopping devices 03 are provided, and the two rows of the floating stopping devices 03 are oppositely arranged on the upper inclined plates 02 at the left side and the right side of the top of the rhombic liquid tank 01; each row of the floating stopping devices 03 comprises a plurality of floating stopping devices 03 which are arranged at intervals along the head-tail direction of the rhombic liquid tank 01 (namely the length direction or the front-back direction of the rhombic liquid tank 01).

As shown in fig. 3, the floating stop device 03 includes a main plate 031 and two toggle plates 032, and the two toggle plates 032 are disposed opposite to each other on the left and right sides of the main plate 031.

As shown in fig. 4, the invention provides a method for determining a hoisting scheme of a diamond-shaped liquid tank, which comprises the following steps:

s1, acquiring the weight, the gravity center, the size and the structural form of the diamond-shaped liquid tank 01;

the weight of the rhombic liquid tank 01 comprises the structural weight, the welding weight, the insulation weight, the paint weight, the piping weight, the outfitting weight and other estimated weights, and the estimated weights mainly comprise the estimated reinforcing weight and the estimated crane weight. In the present embodiment, the weight of the diamond-shaped liquid tank 01 is about 1430t, the length of the whole diamond-shaped liquid tank 01 is 37.6m, the width is 27.1m, the height is 21.9m, the center of gravity of the diamond-shaped liquid tank 01 is located on the longitudinal median plane of the diamond-shaped liquid tank 01, and the distance from the center of gravity to the rear end surface of the diamond-shaped liquid tank 01 is 17.9m, which is basically located at the geometric center of the diamond-shaped liquid tank 01.

S2, selecting a 1600t gantry crane according to the weight, the gravity center and the size of the diamond-shaped liquid tank 01, wherein the gantry crane is provided with two upper trolleys, each upper trolley is provided with two main lifting hooks 1, and each main lifting hook 1 is provided with a lifting bar 2; the hoisting rows 2 are triangular hoisting rows, and the hoisting coverage range of the gantry crane is determined according to the positions of the four hoisting rows 2;

in this embodiment, since the weight of the diamond-shaped tank 01 is about 1430t, each suspension mat 2 bears about 357.5 t.

S3, constructing a hoisting scheme, wherein the construction of the hoisting scheme mainly comprises the following steps:

(1) determining the number, specification and arrangement position of the hoisting horses connected on each hoisting row 2 according to the hoisting coverage, the structural characteristics of the hoisting rows 2, the arrangement position of the floating stopping device 03 on the rhombic liquid tank 01 and the weight and gravity center of the rhombic liquid tank 01; the hanging horse is obtained by arranging a hanging horse hole 033 on the floating stop device 03; when the hanging horses are arranged, all the hanging horses are required to be symmetrical front and back and left and right relative to the gravity center of the diamond-shaped liquid tank 01, so that the stress of each hanging horse is uniform; the specifications of the hanging horse are two types: the first type is a single-lifting-lug structure, which is obtained by arranging a lifting lug hole 033 on a main plate 031 of the floating stop device 03; the second type is a three-lifting-lug structure, which is obtained by respectively arranging a lifting-lug hole 033 on a main plate 031 of the floating stop device 03 and toggle plates 032 on the left and right sides of the main plate 031;

because hang the horse and add the horse hole 033 and obtain through ending the superficial device 03 to current on the rhombus fluid reservoir 01 and add, need not additionally to add and hang the horse, effectively avoided the follow-up work of cutting off of hanging the horse, both reduced operation personnel's work load, avoided simultaneously cutting off the improper diamond-shaped fluid reservoir 01 damage that causes because of hanging the horse.

Because the main boardThe allowable load of the hanger holes 033 in 031 is 60t, and the allowable load of the hanger holes 033 in the toggle plate 032 is 30t, so that the allowable load of the hanger with the single-lug structure is 60t, and the allowable load of the hanger with the three-lug structure is 120t (60t +30t +30t is 120 t). The number of the hangers which can be connected with the triangular hanging row is 2ⁿWherein n is a positive integer not less than 1, and the weight born by the hanger row 2 is about 357.5t, it can be calculated that the number of hangers which can be connected by the triangular hanger row is at least 4 (namely 2)²One), in this embodiment, the number of hangers that the triangular hanger row can be connected to is set to 4 (i.e. 2)²And the selected hoisting horse is of a three-lifting-lug structure.

(2) Determining a connecting line between each hanging horse and the corresponding hanging row according to the arrangement position of each hanging horse and the position of the corresponding hanging row, wherein the connecting line is a steel wire rope for connecting the hanging horses and the corresponding hanging rows, so that the inclination angle and the length of the steel wire rope between each hanging horse and the corresponding hanging row are determined, and the stress condition of each hanging horse is further determined; the inclination angle of the steel wire rope is an included angle between a connecting line between the hoisting horse and the corresponding hoisting row and a horizontal plane;

it is understood that the steel wire rope is a virtual steel wire rope, and is simplified for the convenience of calculation.

According to a static balance formula, calculating the stress of each hanging horse, namely the stress among the hanging horses needs to satisfy the following formula:

wherein i is the serial number of the suspended horses, and j is the total number of the suspended horses; f_iStress of each hanging horse; f_isinα_iFor vertical stress of the suspended horse；F_icosα_iStress along the longitudinal direction is applied to the suspended horse; g is the weight of the rhombic liquid tank; l is_iThe vertical distance (i.e. force arm) from the gravity center of the rhombic liquid tank to the stress of each hanging horse.

(3) According to the stress condition of each hanging horse, whether the stress of each hanging horse meets the requirement is approved; if the requirements are met, determining the connection form of each lifting hole and the corresponding lifting row of the lifting horse, further calculating the stress of each lifting horse hole of the lifting horse, and if the requirements are not met, correcting the steps (1) to (2) until the stress of each lifting horse hole meets the requirements;

calculated F_iShould be less than the allowable load of the corresponding crane, if calculated F_iAnd (3) if the stress of each hanging horse is not in line with the requirement, correcting the steps (1) and (2) in the step S3 until the stress of each hanging horse is in line with the requirement, wherein the correction content comprises the number and the specification of the corrected hanging horses.

The stress of each lifting horse in the embodiment meets the requirement through calculation, and correction is not needed, and as the lifting horse in the embodiment is of a three-lifting-lug structure, the connection form between each lifting horse hole and the corresponding lifting row of the lifting horse is shown in the lifting arrangement scheme of fig. 2.

As shown in fig. 2, the constructed hoisting arrangement scheme is as follows: each main hook 1 is provided with a triangular hanging row, the triangular hanging row is provided with two pulleys 21, each pulley 21 is wound with a main steel wire rope 3, the diameter of each main steel wire rope 3 is phi 90mm, the length of each main steel wire rope 3 is 30m, each main steel wire rope 3 is provided with two rope ends, each rope end on each main steel wire rope 3 is provided with a main shackle 4, and each main shackle 4 is a shackle of 120 t; each main shackle 4 is connected with a crane through an auxiliary steel wire rope 5 with the length of 20m and the diameter of phi 65mm, and the specific connection mode is as follows: one rope end of the auxiliary steel wire rope 5 is fixedly connected with a hanger hole 033 on a hanger left-side toggle plate 032 through a first auxiliary shackle 6, and the other rope end of the auxiliary steel wire rope 5 sequentially penetrates through the main shackle 4, a second auxiliary shackle 7 on a hanger main plate 031 and the main shackle 4 and then is connected with the right-side toggle plate 032 through the first auxiliary shackle 6, so that an M-shaped connection mode is formed. By adopting the connection mode, the pulling force of the auxiliary steel wire rope 5 borne by the second auxiliary shackle 7 is 2 times that of the first auxiliary shackle 6; the first sub-shackle 6 is a 55t shackle and the second sub-shackle 7 is an 85t shackle.

Because the stress of each horse sling is known, the stress of each horse sling hole 033 at the horse sling is calculated according to the stress relation between the horse sling holes 033 at the same horse sling.

S4, establishing a finite element model when the rhombic liquid tank is hoisted according to a structural drawing of the rhombic liquid tank and the determined hoisting scheme;

it can be understood that the invention can adopt various commercially available finite element software such as ansys to build a finite element model of the diamond-shaped liquid tank 01, and specifically adopts which software, which is not limited, and ShipRight FastTrack software is preferably used in the embodiment.

When ShipRight FastTrack software is used for carrying out finite element modeling on the diamond-shaped liquid tank 01, the main body structure of the diamond-shaped liquid tank 01 is constructed by a large number of quadrilateral plate shell units and a small number of triangular units, a reinforcing structure is constructed by plate units or beam units, the size of grids of the main body structure and the reinforcing structure is rib spacing multiplied by longitudinal bone spacing, the grid size needs to be further refined to be 50mm multiplied by 50mm at an important investigation part, and the important investigation part is a position which is easy to deform and damage.

S5, applying stress corresponding to a lifting eye at the lifting eye position of the established finite element model, wherein the application direction is the length direction of the corresponding steel wire rope, and then calculating the stress and deformation condition of the diamond-shaped liquid tank in the lifting process;

specifically, a Multi-point constraint MPC (Multi-point constraints) unit is established at each hanging hole position on the established diamond-shaped liquid tank finite element model and used for simulating the stress relation between each hanging horse hole and the corresponding auxiliary shackle and auxiliary steel wire rope, the method specifically comprises the steps of selecting an upper semi-circle grid point of the hanging horse hole 033 actually contacted with the auxiliary shackle to establish the MPC unit, applying the hanging horse hole stress obtained by calculation in S3 at the center point of the MPC unit established by each hanging horse hole, and the application direction is consistent with the length direction of the corresponding auxiliary steel wire rope; then, after adding the rest boundary conditions, carrying out finite element hoisting calculation to obtain a mesh refining area, wherein the maximum deformation of the rhombic liquid tank 01 is 5.3mm, the maximum normal stress is 138.4MPa, the maximum shear stress is 64.3MPa, and the maximum stress occurs in a key investigation part; the added boundary conditions include gravitational field loading and constraints that limit the rotation of the diamond-shaped tank 01.

S6, approving whether the stress and deformation conditions of the diamond-shaped liquid tank meet requirements or not, and if so, determining a final hoisting scheme; if the stress distribution and the deformation condition are not met, optimizing the hoisting scheme according to the obtained stress distribution and deformation condition, and carrying out finite element analysis calculation and approval on the optimized hoisting scheme again until the optimized hoisting scheme meets the requirements; the optimization of the hoisting scheme comprises optimization of the arrangement of the hoisting horses and/or optimization of local reinforcement.

Finding out that: the maximum deformation amount of 5.3mm of the diamond-shaped liquid tank 01 is smaller than 1/800 with the maximum size of the structure (namely 37600 mm/800-47 mm); the maximum positive stress is 138.4MPa and is smaller than 315MPa of the allowable stress of the diamond-shaped liquid tank structure material, the maximum shear stress is 64.3MPa and is smaller than 0.6 times of the allowable stress (namely, the maximum shear stress is smaller than 315MPa and 0.6-189 MPa), the requirement of construction precision is met, and therefore the final hoisting scheme is determined.

The method for determining the lifting scheme of the diamond-shaped liquid tank is applied to lifting of the diamond-shaped liquid tanks of different liquefied gas carrier types, the determined lifting schemes are successful under the condition that the accuracy requirement is met, and practices prove that the method for determining the lifting scheme of the diamond-shaped liquid tank is a reliable scheme determining method and provides strong and favorable support for engineering application.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention shall be covered by the claims of the present invention.