Marine liquefied gas tanks

Abstract

This invention provides a liquefied gas tank for ships. The liquefied gas tank for ships includes a tank body and a support system consisting of a plurality of smoothly transitioning and connected arc-shaped plates (102, 103, 104, 105, 106, 107, 108). By setting the radius R of each arc-shaped plate to 10 to 50 times the height H of the arc surface, the requirements for high-pressure storage of liquefied gas and maximization of the cargo hold capacity of the liquefied gas tank for ships can be simultaneously met. Furthermore, the arc-shaped plates include a steel outer plate (11), a carbon fiber coating layer (12), and an insulating layer (13), thereby simultaneously improving the pressure resistance and reducing the weight of the liquefied gas tank for ships, and reducing the manufacturing cost and shipping cost of the liquefied gas tank. The support system includes a plurality of support saddles (21, 22) arranged symmetrically with respect to the centerline of the cross-section of the tank body, and the structure or dimensions of the support saddles can be adjusted according to the curvature of the arc-shaped plates, allowing the tank body to be housed more stably in the cargo hold.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and particularly to liquefied gas tanks for ships.

Background Art

[0002] For the need of offshore gas transportation, liquefying gas and then pressurizing and heat-insulating for storage is one of the most practical storage methods. In order to meet the high-pressure storage needs of some liquefied gases, cylindrical or spherical liquefied gas tanks are usually adopted. However, with the enlargement of liquefied gas tanks, the drawback that cylindrical or spherical liquefied gas tanks do not conform to the shape of the ship's hold has become increasingly prominent. For cylindrical or spherical liquefied gas tanks, the utilization rate of the hold capacity decreases. Under the limited main dimensions of the ship, the maximization of the hold capacity cannot be achieved, and the transportation efficiency decreases. Conventional rhombic or thin-film liquefied gas tanks conform to the shape of the ship's hold and have a high utilization rate of the hold capacity, but they cannot withstand pressures above 0.7 bar, that is, they cannot meet the high-pressure storage needs of some liquefied gases. Therefore, in this industry, the emergence of a liquefied gas tank for ships with high pressure resistance and high utilization rate of the hold capacity is eagerly awaited.

Summary of the Invention

Problems to be Solved by the Invention

[0003] The present invention is made in view of the defects existing in the prior art, and its purpose is to provide a liquefied gas tank for ships to solve the technical problem that the liquefied gas tank for ships in the prior art cannot simultaneously meet the requirements of high-pressure storage and maximization of the hold capacity.

Means for Solving the Problems

[0004] To achieve the above objective, the present invention provides a marine liquefied gas tank including a tank body made up of a plurality of smoothly transitioning and connected arc-shaped plates. In the cross-section of the tank body, one top arc-shaped plate, two upward-sloping arc-shaped plates of the same size, two side arc-shaped plates of the same size, two downward-sloping arc-shaped plates of the same size, and one bottom arc-shaped plate are provided in order from top to bottom, and a front arc-shaped plate and a rear arc-shaped plate are provided at the front and rear ends of the tank body, respectively, and the arc-shaped plates are smoothly connected to each other via transitioning connecting arc-shaped plates, and the radius of the arc-shaped plates is 10 to 50 times the height of the arc-shaped plate.

[0005] In one embodiment, the radius of each arc-shaped plate, the span of arc-shaped plates between adjacent transitional connecting arc-shaped plates, and the height of each arc-shaped plate satisfy the following equation.

number

[0006] Here, R is the radius of the arc-shaped plate, L is the span between adjacent transitional arc-shaped plates, and H is the height of the arc-shaped plate.

[0007] In one embodiment, the arc-shaped plate is made of a steel outer plate, and the outer surface of the tank body is provided with a carbon fiber coating layer and an insulating layer. The carbon fiber coating layer is formed by covering the outer surface of the tank body with the carbon fiber coating tape, and the insulating layer covers the outer surface of the carbon fiber coating layer.

[0008] In one embodiment, the system further includes a support system for supporting the tank body, wherein the support system comprises a plurality of support systems arranged symmetrically with respect to the center line in the cross-section of the tank body. The system includes a support saddle, which is fixedly connected to the bottom arc-shaped plate and the bottom of the cargo hold that houses the tank body.

[0009] In one embodiment, the support saddle includes a support column, a support plate, a pressure-resistant sleeper, a saddle plate, and a saddle frame, wherein the bottom arc-shaped plate is fixedly connected to the support column, the support column is fixedly connected to the support plate, the support plate is supported from below by the pressure-resistant sleeper, the pressure-resistant sleeper is supported from below by the saddle plate, a saddle surrounding plate that surrounds the pressure-resistant sleeper is fixed to the saddle plate, the saddle plate is fixedly connected to the saddle frame, the saddle frame is fixedly connected to the bottom of the cargo hold, and the saddle frame is provided with a reinforcing structure.

[0010] In one embodiment, the support columns, the support plates, and the bottom arc-shaped plates are made of steel of the same standard, the bottom arc-shaped plates and the support columns are welded together, the support columns and the support plates are welded together, the saddle plates, the saddle surrounding plates, the saddle frames, and the reinforcing structures are made of steel of the same standard as the bottom of the cargo hold, the saddle plates and the saddle frames are welded together, and the saddle frames are welded together to the bottom of the cargo hold.

[0011] In one embodiment, the support plates of each support saddle are positioned at the same horizontal height, and the height of the support columns corresponding to different positions of the bottom arc-shaped plate is adjusted according to the curvature of the bottom arc-shaped plate.

[0012] In one embodiment, the structure and dimensions of the support column, support plate, pressure-resistant sleeper, saddle plate, and saddle enclosure plate of each support saddle are all the same, and the height of the saddle frame and reinforcing structure corresponding to different positions of the bottom arc-shaped plate is adjusted according to the curvature of the bottom arc-shaped plate.

[0013] In one embodiment, the structure and dimensions of the support column, support plate, saddle plate, saddle surrounding plate, saddle frame, and reinforcing structure of each support saddle are all the same, and the height of the pressure-resistant sleeper corresponding to different positions of the bottom arc-shaped plate is adjusted according to the curvature of the bottom arc-shaped plate.

[0014] In one embodiment, the support saddle includes a central support saddle and an oblique support saddle, the central support saddle is provided on the center line of the bottom arc-shaped plate, the center line of the central support saddle coincides with the center line of the bottom arc-shaped plate, the oblique support saddle is provided on each of the transition connecting arc-shaped plates connecting the bottom arc-shaped plate and the side arc-shaped plate, and the center line of the oblique support saddle passes through the center of the transition connecting arc-shaped plate.

[0015] In one embodiment, the tank body further includes a thickening ring provided at a cross-sectional position corresponding to a support saddle of the tank body, the thickening ring includes a thickened steel outer plate and an insulating layer, the insulating layer covering the outer surface of the thickened steel outer plate.

[0016] In one embodiment, the width of the thickening ring is greater than the width of the support saddle corresponding to the thickening ring.

[0017] In one embodiment, the cross-sectional region of the tank body provided with the support saddle is defined as the saddle region, and the cross-sectional region of the tank body not provided with the support saddle is defined as the non-saddle region. In the non-saddle region, the carbon fiber coating tape covers the outer surface of the steel outer plate in an annular manner along the cross-sectional contour of the tank body, while in the saddle region, the carbon fiber coating tape covers the steel outer plate in one direction or in two intersecting directions.

[0018] In one embodiment, the cross-sectional area of ​​the tank body on which the support saddle is provided is defined as the saddle region, and the cross-sectional area of ​​the tank body on which the support saddle is not provided is defined as the non-saddle region. A bottom arc web is provided between the support saddle and the bottom arc plate, the center line of the bottom arc web coincides with the center line of the support saddle, and arc transition wedges are provided on both the left and right sides of the bottom arc web symmetrically with respect to the center line of the bottom arc web in a direction perpendicular to the longitudinal direction of the tank. The width of the bottom arc-shaped web perpendicular to the longitudinal direction of the tank is greater than the width of the support column perpendicular to the longitudinal direction of the ship, the upper surface of the bottom arc-shaped web and the upper surface of the arc-shaped transition wedge are both in direct contact with the outer surface of the bottom arc-shaped plate, the lower surface of the bottom arc-shaped web, the lower surface of the arc-shaped transition wedge, and the outer surface of the bottom arc-shaped plate not covered by the arc-shaped transition wedge form a smooth curved surface, and the carbon fiber coating tape covers the outer surface of the steel outer plate in an annular manner along the cross-sectional contour of the tank body.

[0019] In one embodiment, the support column is cylindrical, and within the saddle region, the length of the carbon fiber coating tape in the longitudinal direction of the tank is set to half the distance in the longitudinal direction between the centerlines of two adjacent support columns in the longitudinal direction of the ship, the carbon fiber coating tape annularly covers the outer surface of the steel casing along the cross-sectional contour of the tank body, and as the carbon fiber coating tape passes over the support column, the carbon fiber coating tape first makes tangential contact with the support column, then makes contact with a part of the arc-shaped portion of the support column, and finally separates tangentially from the support column, the two contact points between the same carbon fiber coating tape and the same support column are symmetrical with respect to the centerline in the longitudinal direction of the ship, and the contact points between adjacent carbon fiber coating tapes and the same support column are symmetrical with respect to the centerline perpendicular to the longitudinal direction of the ship.

[0020] In one embodiment, the support column is a non-cylindrical body, and a plurality of fixing rivets are provided at equal intervals along the longitudinal direction of the tank near the edges of the arc-shaped transition wedges on both the left and right sides of the bottom arc-shaped web. Within the saddle region, the length of the carbon fiber coated tape in the longitudinal direction of the ship is set to half of the distance between the center lines of two adjacent fixing rivets in the longitudinal direction of the ship. The carbon fiber coated tape annularly covers the outer surface of the steel outer plate along the cross-sectional contour of the tank body. When the carbon fiber coated tape passes through the fixing rivet, the carbon fiber coated tape surrounds and covers the fixing rivet.

Advantages of the Invention

[0021] Compared with the prior art, the present application has the following beneficial effects.

[0022] The liquefied gas tank for ships according to the present application includes a tank body composed of a plurality of smoothly transitioning and connected arc-shaped plates and a support system. The radius R of each arc-shaped plate is 10 to 50 times the height H of the arc surface, and it can simultaneously meet the requirements of high-pressure storage of liquefied gas and maximizing the hold capacity of the liquefied gas tank for ships. Further, in the present application, the arc-shaped plate includes a steel outer plate, a carbon fiber coating layer, and a heat insulation layer, which can simultaneously improve the pressure resistance of the liquefied gas tank for ships and reduce the weight, and can reduce the manufacturing cost of the liquefied gas tank and the ship transportation cost. The support system according to the present application includes a plurality of support saddles arranged symmetrically with respect to the center line of the cross-section of the tank body, and the structure or dimensions of the support saddle can be adjusted according to the curvature of the arc-shaped plate, and the tank body can be more stably accommodated in the hold.

Brief Description of the Drawings

[0023] To more clearly illustrate the technical solutions according to the embodiments of the present application, the drawings used in the embodiments will be briefly described below. It should be noted that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope of the present application. It should be understood that those skilled in the art can obtain other related drawings based on these drawings without creative efforts. [Figure 1]It is a schematic longitudinal sectional view of the tank body of the liquefied gas tank for ships in the embodiment of the present application. [Figure 2] It is a schematic cross-sectional view of the tank body of the liquefied gas tank for ships in the embodiment of the present application. [Figure 3] It is a schematic view showing the material structure of the arc-shaped plate in the embodiment of the present application. [Figure 4] It is a schematic view showing the dimensional structure of the arc-shaped plate in the embodiment of the present application. [Figure 5] It is a schematic structural view of the support saddle in the embodiment of the present application. [Figure 6] It is a schematic view of Arrangement Method 1 of the support saddle in the embodiment of the present application. [Figure 7] It is a schematic view of Arrangement Method 2 of the support saddle in the embodiment of the present application. [Figure 8] It is a schematic view of Arrangement Method 3 of the support saddle in the embodiment of the present application. [Figure 9] It is a schematic view of Arrangement Method 4 of the support saddle in the embodiment of the present application. [Figure 10] It is a schematic view of the tank body with the thickening ring installed in the embodiment of the present application. [Figure 11] It is a schematic view of the material structure of the thickening ring in the embodiment of the present application. [Figure 12] It is a schematic view showing the arrangement state of the liquefied gas tank for ships in the ship in the embodiment of the present application. [Figure 13] It is a schematic view showing Diagonal Winding Method 1 of the carbon fiber coated tape in the embodiment of the present application. [Figure 14] It is a schematic view showing Diagonal Winding Method 2 of the carbon fiber coated tape in the embodiment of the present application. [Figure 15] It is a schematic view showing Diagonal Winding Method 3 of the carbon fiber coated tape in the embodiment of the present application. [Figure 16] It is a partial cross-sectional schematic view of Coating Method 1 of the carbon fiber coated tape provided with the bottom arc-shaped web in the embodiment of the present application. [Figure 17] It is a plan schematic view of Coating Method 1 of the carbon fiber coated tape provided with the bottom arc-shaped web in the embodiment of the present application. [Figure 18] This is a partially enlarged schematic diagram of a support column and carbon fiber coated tape based on coating method 1 of the carbon fiber coated tape provided with a bottom arc-shaped web in an embodiment of the present invention. [Figure 19] This is a schematic partial cross-sectional view of coating method 2 of a carbon fiber coated tape provided with a bottom arc-shaped web in an embodiment of the present invention. [Figure 20] This is a schematic plan view of coating method 2 of a carbon fiber coated tape provided with a bottom arc-shaped web in an embodiment of the present invention. [Modes for carrying out the invention]

[0024] To further clarify the object, technical solution, and advantages of the embodiments of the present invention, the technical solution according to the embodiments of the present invention will be clearly and completely described with reference to the drawings relating to the embodiments of the present invention. It should be noted that the embodiments described are only some embodiments of the present invention, not all embodiments. Typically, the components of the embodiments of the present application described and shown in the drawings can be arranged and designed in a variety of different configurations.

[0025] Therefore, the detailed description of embodiments of the present application shown below with reference to the drawings is not intended to limit the scope of protection of the present application, but merely to illustrate selected embodiments. All other embodiments that can be obtained by a person skilled in the art without creative effort based on the embodiments of the present application are included within the scope of protection of the present application.

[0026] This embodiment reveals a marine liquefied gas tank including a tank body 1 consisting of multiple smoothly transitioning and connected arc-shaped plates. As shown in Figure 2, in the cross-section of the tank body 1, one top arc-shaped plate 101, two upward-sloping arc-shaped plates 102 of the same size, two side arc-shaped plates 103 of the same size, two downward-sloping arc-shaped plates 104 of the same size, and one bottom arc-shaped plate 105 are provided in order from top to bottom. As shown in Figure 1, front arc-shaped plates 107 and rear arc-shaped plates 106 are provided at the front and rear ends of the tank body 1, respectively, and each arc-shaped plate is smoothly connected via transitioning connecting arc-shaped plates 108. As shown in Figure 4, the radius of each arc-shaped plate is R, and adjacent transitioning connecting arc-shaped plates Let L be the span of the 108-meter arc-shaped plate, and H be the height of the arc surface. The smaller the radius R of the arc-shaped plate, the greater the curvature of the arc-shaped plate, which reduces the cargo capacity utilization rate of the tank body 1, but increases the pressure resistance capacity of the tank body 1. In order to simultaneously satisfy the requirements for high-pressure resistance performance and maximization of cargo capacity of the tank body 1, the radius R of the arc-shaped plate should be 10 to 50 times the height H of the arc surface. Specifically, the relationship between R, L, and H should satisfy the following equation.

number

[0027] As shown in Figures 6 to 9, the minimum distance between the tank body 1 and the side wall of the cargo hold 301 that houses the tank body 1 is 380 to 400 cm, and the minimum distance between the tank body 1 and the bottom of the cargo hold 301 is 380 to 450 cm.

[0028] To improve the pressure resistance of a marine liquefied gas tank, the curved plate is made of a steel outer plate 11. As shown in Figure 3, a carbon fiber coating layer 12 and an insulating layer 13 are provided on the outer surface of the tank body 1. The thickness of the carbon fiber coating layer 12 is designed based on the tank pressure, and the carbon fiber coating layer 12 provides a pressure resistance capacity of 10% to 30% or more of the tank vapor pressure, while the insulating layer 13 insulates the tank body 1 and reduces heat exchange between the inside and outside of the tank. The carbon fiber coating layer 12 is formed by covering the outer surface of the tank body 1 with carbon fiber coating tape 15, and the insulating layer 13 covers the outer surface of the carbon fiber coating layer 12.

[0029] To house the tank body 1 within the cargo hold 301 of the vessel 3, the marine liquefied gas tank further includes a support system for supporting the tank body 1, as shown in Figures 6 to 10 and 12. The support system includes a plurality of support saddles 2 arranged symmetrically with respect to the centerline of the cross-section of the tank body 1, and the support saddles 2 are fixedly connected to the bottom arc plate 105 and the bottom of the cargo hold 301. As shown in Figure 5, the support saddles 2 include a column 201, a support plate 202, a pressure-resistant sleeper 203, a saddle plate 204, and a saddle frame 206. The bottom arc-shaped plate 105 is fixedly connected to the support column 201, the support column 201 is fixedly connected to the support plate 202, the support plate 202 is fixedly connected to the pressure-resistant sleeper 203, the pressure-resistant sleeper 203 is fixedly connected to the saddle plate 204, the saddle plate 204 is fixedly connected to the saddle frame 206, and the saddle frame 206 is fixedly connected to the bottom of the cargo hold 301. In order to improve the load-bearing capacity of the saddle frame 206, a reinforcing structure 207 is provided on the saddle frame 206. In this embodiment, the support column 201, the support plate 202 and the bottom arc-shaped plate 105 are made of steel of the same standard, the bottom arc-shaped plate 105 and the support column 201 are welded together, and the support column 201 and the support plate 202 are welded together. The saddle plate 204, saddle enclosure plate 205, saddle frame 206, and reinforcing structure 207 are made of steel of the same specifications as the bottom of the cargo hold 301. The saddle plate 204 and the saddle frame 206 are welded together, and the saddle frame 206 is welded to the bottom of the cargo hold 301. The reinforcing structure 207, which is a reinforcing rib or connecting plate, is welded to the saddle frame 206. To more securely fix the pressure sleeper 203, a saddle enclosure plate 205 with an opening is provided on the upper surface of the saddle plate 204. The pressure sleeper 203 is compacted and installed inside the saddle enclosure plate 205. Epoxy resin is injected between the pressure sleeper 203 and the saddle plate 204 and saddle enclosure plate 205 to ensure the connection and fixation of the pressure sleeper 203 and the saddle enclosure plate 205. The pressure-resistant sleeper 203 uses a wood material with excellent insect resistance, water resistance, crack resistance, insulation, and chemical stability. In this embodiment, the pressure-resistant sleeper 203 is made from birch wood, and the birch veneer is formed as laminated wood through resin impregnation and heat bonding.

[0030] Because the bottom arc-shaped plate 105 has curvature, different positions of the bottom arc-shaped plate 105 are at different distances from the bottom of the cargo hold 301, and different support saddles are used to stably house the tank body 1. A configuration method can be adopted. In configuration method 1 for the support saddles 2, as shown in Figure 6, the structure and dimensions of the support plate 202, pressure-resistant sleeper 203, saddle plate 204, saddle surrounding plate 205, saddle frame 206, and reinforcing structure 207 of each support saddle 2 are all the same, and the support plates 202 are positioned at the same horizontal plane height. In addition, the height of the support column 201 corresponding to different positions of the bottom arc-shaped plate 105 is adjusted according to the curvature of the bottom arc-shaped plate 105.

[0031] In the support saddle arrangement method 2, as shown in Figure 7, the structure and dimensions of the support column 201, support plate 202, pressure-resistant sleeper 203, saddle plate 204, and saddle surrounding plate 205 of each support saddle 2 are all the same, and the height of the saddle frame 206 and reinforcing structure 207 corresponding to different positions of the bottom arc-shaped plate 105 is adjusted according to the curvature of the bottom arc-shaped plate 105.

[0032] In the support saddle arrangement method 3, as shown in Figure 8, the structure and dimensions of the support column 201, support plate 202, saddle plate 204, saddle surrounding plate 205, saddle frame 206, and reinforcing structure 207 of each support saddle 2 are the same, and the height of the pressure-resistant sleeper 203 corresponding to different positions of the bottom arc-shaped plate 105 is adjusted according to the curvature of the bottom arc-shaped plate 105.

[0033] In the support saddle arrangement method 4, as shown in Figure 9, the support saddle 2 includes a central support saddle 21 and diagonal support saddles 22. The central support saddle 21 is provided on the center line of the bottom arc-shaped plate 105, and the center line of the central support saddle 21 coincides with the center line of the bottom arc-shaped plate 105. In addition, diagonal support saddles 22 are provided on each of the transitional connecting arc-shaped plates 108 that connect the bottom arc-shaped plate 105 and the downward inclined arc-shaped plate 104. The width of the support plate 202 of the central support saddle 21 and the saddle plate 204 in the cross-section of the tank body 1 are both 20% to 35% of the span Lp of the bottom arc-shaped plate 105, and the center line of the diagonal support saddle 22 passes through the center of the transitional connecting arc-shaped plate 108.

[0034] To facilitate the wrapping of the tank body 1 with carbon fiber coated tape 15 and the installation of the support saddle 2 below the tank body 1, the tank body 1 further includes a thickening ring 14, as shown in Figure 10. The thickening ring 14 is provided at a cross-sectional position corresponding to the support saddle 2 of the tank body 1. As shown in Figure 11, the thickening ring 14 includes a thickened steel outer plate 11a and an insulating layer 13, the insulating layer 13 covering the outer surface of the thickened steel outer plate 11a. The thickened steel outer plate 11a provides support against the steam pressure inside the tank body 1 and ensures airtightness and controllability of structural deformation under high-pressure conditions inside the tank body 1. The insulating layer 13 insulates the tank body 1 and reduces heat exchange between the inside and outside of the tank. In the tank body 1, in areas other than the thickening ring 14, the carbon fiber coating layer 12 is formed by carbon fiber coating tape 15 covering the outer surface of the coated steel outer plate 11 in an annular manner along the cross-sectional contour of the tank body 1, and the heat insulating layer 13 covers the outer surface of the carbon fiber coating layer 12. In the longitudinal direction of the tank body 1, the width of the thickening ring 14 is greater than the width of the support saddle 2 corresponding to the thickening ring 14. Specifically, with respect to the range of the thickening ring 14, the distance extended relative to the support saddle 2 before and after the support saddle 2 is denoted as Lz, and Lz is the greater of 0.8m and 2% of the length of the tank body 1.

[0035] The cross-sectional region of the tank body 1 where the support saddle 2 is provided is defined as the saddle region, and the cross-sectional region of the tank body 1 where the support saddle 2 is not provided is defined as the non-saddle region. When the tank body 1 does not include the thickening ring 14 and the support saddle 2 is provided below the tank body 1, the marine liquefied gas tank can employ a different carbon fiber coating method in order to cover the outer surface of the tank body 1 with the carbon fiber coating layer 12 as much as possible. In the non-saddle region, the carbon fiber coating tape 15 covers the outer surface of the steel outer plate 11 in an annular manner along the cross-sectional contour of the tank body 1. As shown in Figures 13 to 15, in the saddle region, the carbon fiber coating tape 15 wraps around the steel outer plate 11 while extending diagonally between the support saddles 2. As shown in Figure 13, the carbon fiber coating tape 15 extends from the left rear side of the tank body 1 to the right front side of the tank body 1. The carbon fiber coating tape 15 may be wrapped around the side, or as shown in Figure 14, it may be wrapped from the right rear side of the tank body 1 to the left front side of the tank body 1. In other words, the carbon fiber coating tape 15 covers the steel outer plate 11 in one direction. The carbon fiber coating tape 15 may be wrapped around the tank body 1 from the left rear side to the right front side of the tank body 1, as shown in Figure 15, and simultaneously from the right rear side of the tank body 1 to the left front side of the tank body 1. In other words, the carbon fiber coating tape 15 covers the steel outer plate 11 in two intersecting directions. The carbon fiber coating layer 12 is formed by the carbon fiber coating tape 15 wrapping around the steel outer plate 11, and the heat insulating layer 13 covers the outer surface of the carbon fiber coating layer 12.

[0036] Other carbon fiber coating methods may be employed for marine liquefied gas tanks. As shown in Figures 16 and 19, a bottom arc-shaped web 208 is provided between the support saddle 2 and the bottom arc-shaped plate 105, and the centerline of the bottom arc-shaped web 208 coincides with the centerline of the support saddle 2. In a direction perpendicular to the longitudinal direction of the tank, arc-shaped transition wedges 209 are provided on both the left and right sides of the bottom arc-shaped web 208 symmetrically with respect to the centerline of the bottom arc-shaped web 208. The width of the bottom arc-shaped web 208 in the direction perpendicular to the longitudinal direction of the tank is greater than the width of the support column 201 in the direction perpendicular to the length of the ship, and the upper surfaces of the bottom arc-shaped web 208 and the upper surfaces of the arc-shaped transition wedges 209 are in direct contact with the outer surface of the bottom arc-shaped plate 105. The lower surface of the bottom arc-shaped web 208, the lower surface of the arc-shaped transition wedges 209, and the outer surface of the bottom arc-shaped plate 105 not covered by the arc-shaped transition wedges 209 form a smooth curved surface. The installation of the bottom arc-shaped web 208 ensures that when the support saddle 2 supports the tank body 1, the support saddle 2 is fixedly connected to the bottom arc-shaped web 208, increasing the load-bearing area of ​​the bottom arc-shaped plate 105. This prevents the bottom arc-shaped plate 105 from breaking and also prevents stress concentration at the welded joint between the bottom arc-shaped plate 105 and the support column 201, thereby improving the safety of the tank body 1.

[0037] When the support column 201 is cylindrical, as shown in Figures 16 and 17, within the saddle region, the width of the carbon fiber coating tape 15 in the longitudinal direction of the tank is set to half the distance between the centerlines of two adjacent support columns 201 in the longitudinal direction of the tank. The carbon fiber coating tape 15 covers the outer surface of the steel outer plate 11 in an annular manner along the cross-sectional contour of the tank body 1. As the carbon fiber coating tape 15 passes over the support column 201, as shown in Figure 18, the carbon fiber coating tape 15 first makes tangential contact with the support column 201, then makes contact with a part of the arc-shaped portion of the support column 201, and finally separates tangentially from the support column 201. The two contact points between the same carbon fiber coating tape 15 and the same support column 201 are symmetrical with respect to the longitudinal centerline of the support column 201, and the contact points between adjacent carbon fiber coating tapes 15 and the same support column 201 are symmetrical with respect to the centerline of the support column 201 perpendicular to the longitudinal direction of the tank. In this carbon fiber coated tape coating method, the angle between the radius passing through the contact point and the radius perpendicular to the ship's longitudinal direction is 30°. With the above carbon fiber coated tape coating method, the carbon fiber coated tape 15 smoothly bypasses the cylindrical support column 201, and the area covered by the carbon fiber coated tape 15 on the steel outer plate 11 can be made as large as possible, thus avoiding the breakage of carbon fibers due to abrupt changes in the wrapping method of the carbon fiber coated tape 15.

[0038] When the support column 201 is not cylindrical, as shown in Figures 19 and 20, multiple fixing rivets 210 are provided at equal intervals along the longitudinal direction of the tank near the edges of the arc-shaped transition wedge 209 on both the left and right sides of the bottom arc-shaped web 208. As shown in Figures 19 and 20, within the saddle region, the length of the carbon fiber coating tape 15 in the longitudinal direction of the tank is set to half the distance between the centerlines of two adjacent fixing rivets 210 in the longitudinal direction of the tank, and the carbon fiber coating tape 15 covers the outer surface of the steel outer plate 11 in an annular manner along the cross-sectional contour of the tank body 1. When the carbon fiber coating tape 15 passes over the fixing rivets 210, the carbon fiber coating tape 15 surrounds and covers the fixing rivets 210. The above coating method of the carbon fiber coating tape can be adapted to various shapes of support columns 201.

[0039] The above carbon fiber coating method can also be used for conventional spherical, cylindrical, double-eared, and triple-eared pressure storage tanks. Applicable.

[0040] The foregoing describes only preferred embodiments of the present application and does not limit it. Various modifications and changes are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application are also covered by the scope of the present application. [Explanation of Symbols]

[0041] 1 Tank body; 101 Top arc plate; 102 Upper inclined arc plate; 103 Side arc plate; 104 Lower inclined arc plate; 105 Bottom arc plate; 106 Rear arc plate; 107 Front arc plate; 108 Transitioning connecting arc plate; 11 Steel outer plate; 12 Carbon fiber coating layer; 13 Insulation layer; 11a Thickened steel outer plate; 14 Thickened ring; 15 Carbon fiber coating tape; 2 Support saddle; 201 Support column; 202 Support plate; 203 Pressure-resistant sleeper; 204 Saddle plate; 205 Saddle surrounding plate; 206 Saddle frame; 207 Reinforcement structure; 208 Bottom arc web; 209 Arc transition wedge; 210 Fixing rivet; 21 Center support saddle; 22 Diagonal support saddle; 3 Ship; 301 Cargo hold.

Claims

1. A liquefied gas tank for ships, comprising a tank body (1) consisting of multiple smoothly transitioning and connected arc-shaped plates, wherein in the cross-section of the tank body (1), one top arc-shaped plate (101), two upward-sloping arc-shaped plates (102) of the same size, two side arc-shaped plates (103) of the same size, two downward-sloping arc-shaped plates (104) of the same size, and one bottom arc-shaped plate (105) are provided in order from top to bottom, and a front arc-shaped plate (107) and a rear arc-shaped plate (106) are provided at the front and rear ends of the tank body (1), respectively, and the arc-shaped plates are smoothly connected via transitioning connecting arc-shaped plates (108), and the radius of the arc-shaped plates is 10 to 50 times the height of the arc-shaped plates.

2. The liquefied gas tank for ships according to claim 1, characterized in that, when the radius of the arc-shaped plate is R, the span of the arc-shaped plates between adjacent transitional connecting arc-shaped plates is L, and the height of the arc-shaped plate is H, the radius of each arc-shaped plate, the span of the arc-shaped plates between adjacent transitional connecting arc-shaped plates, and the height of each arc-shaped plate satisfy the following formula. 【Number 3】

3. The arc-shaped plate is made of a steel outer plate (11), the outer surface of the tank body (1) is provided with a carbon fiber coating layer (12) and an insulating layer (13), the carbon fiber coating layer (12) is formed by covering the outer surface of the tank body (1) with a carbon fiber coating tape (15), and the insulating layer (13) covers the outer surface of the carbon fiber coating layer (12), as described in claim 1.

4. The system further includes a support system for supporting the tank body (1), The support system includes a plurality of support saddles (2) arranged symmetrically with respect to the center line in the cross-section of the tank body (1), wherein the support saddles (2) are fixedly connected to the bottom arc-shaped plate (105) and the bottom of the cargo hold housing the tank body (1), as described in claim 3.

5. The support saddle (2) includes a support column (201), a support plate (202), a pressure-resistant sleeper (203), a saddle plate (204), and a saddle frame (206), wherein the bottom arc-shaped plate (105) is fixedly connected to the support column (201), the support column (201) is fixedly connected to the support plate (202), the support plate (202) is supported from below by the pressure-resistant sleeper (203), and the pressure-resistant sleeper (203) is supported by the saddle plate (204) The liquefied gas tank for ships according to claim 4, characterized in that it is supported from below, a saddle surrounding plate (205) that surrounds the pressure-resistant sleeper (203) is fixed to the saddle plate (204), the saddle plate (204) is fixedly connected to the saddle frame (206), the saddle frame (206) is fixedly connected to the bottom of the cargo hold (301), and a reinforcing structure (207) is provided on the saddle frame (206).

6. The support columns (201), the support plates (202), and the bottom arc-shaped plate (105) are made of steel of the same standard, the bottom arc-shaped plate (105) and the support columns (201) are welded together, the support columns (201) and the support plates (202) are welded together, the saddle plate (204), the saddle surrounding plate (205), the saddle frame (206), and the reinforcing structure (207) are made of steel of the same standard as the bottom of the cargo hold (301), and the saddle plate (204) and the saddle The liquefied gas tank for ships according to claim 5, characterized in that the frame (206) is welded to the saddle frame (206) and the bottom of the cargo hold (301) is welded to the saddle frame (206).

7. The support plates (202) of each support saddle (2) are positioned at the same horizontal height, and the height of the support columns (201) corresponding to different positions on the bottom arc-shaped plate (105) is adjusted according to the curvature of the bottom arc-shaped plate (105), as described in claim 5.

8. The structure and dimensions of the support columns (201), support plates (202), pressure-resistant sleepers (203), saddle plates (204), and saddle surrounding plates (205) of each support saddle (2) are all the same, and the heights of the saddle frames (206) and reinforcing structures (207) corresponding to different positions of the bottom arc-shaped plate (105) are adjusted according to the curvature of the bottom arc-shaped plate (105), as described in claim 5.

9. The structure and dimensions of the support column (201), support plate (202), saddle plate (204), saddle surrounding plate (205), saddle frame (206), and reinforcing structure (207) of each support saddle (2) are all the same, and the height of the pressure-resistant sleeper (203) corresponding to different positions of the bottom arc-shaped plate (105) is adjusted according to the curvature of the bottom arc-shaped plate (105), as described in claim 5.

10. The support saddle (2) includes a central support saddle (21) and an oblique support saddle (22), the central support saddle (21) is provided on the center line of the bottom arc-shaped plate (105), the center line of the central support saddle (21) coincides with the center line of the bottom arc-shaped plate (105), the oblique support saddle (22) is provided on each of the transition connecting arc-shaped plates (108) that connect the bottom arc-shaped plate (105) and the side arc-shaped plates (103), and the center line of the oblique support saddle (22) passes through the center of the transition connecting arc-shaped plate (108), as described in claim 4.

11. The liquefied gas tank for ships according to claim 4, wherein the tank body (1) further includes a thickening ring (14) provided at a cross-sectional position corresponding to the support saddle (2) of the tank body (1), the thickening ring (14) includes a thickened steel outer plate (11a) and an insulating layer (13), and the insulating layer (13) covers the outer surface of the thickened steel outer plate (11a).

12. The marine liquefied gas tank according to claim 11, characterized in that the width of the thickening ring (14) is greater than the width of the support saddle (2) corresponding to the thickening ring (14).

13. The liquefied gas tank for ships according to claim 4, wherein the cross-sectional region of the tank body (1) provided with the support saddle (2) is defined as the saddle region, and the cross-sectional region of the tank body (1) not provided with the support saddle (2) is defined as the non-saddle region, and in the non-saddle region, the carbon fiber coated tape (15) covers the outer surface of the steel outer plate (11) in an annular manner along the cross-sectional contour of the tank body (1), and in the saddle region, the carbon fiber coated tape (15) covers the steel outer plate (11) in one direction or in two intersecting directions.

14. If the cross-sectional area of ​​the tank body (1) on which the support saddle (2) is provided is defined as the saddle area, and the cross-sectional area of ​​the tank body (1) on which the support saddle (2) is not provided is defined as the non-saddle area, then a bottom arc web (208) is provided between the support saddle (2) and the bottom arc plate (105), the center line of the bottom arc web (208) coincides with the center line of the support saddle (2), and in a direction perpendicular to the longitudinal direction of the tank, arc transition wedges (209) are provided on both the left and right sides of the bottom arc web (208) symmetrically with respect to the center line of the bottom arc web (208), and the bottom arc web (208) is perpendicular to the longitudinal direction of the tank The width in the direction is greater than the width in the direction perpendicular to the longitudinal direction of the support column (201), the upper surface of the bottom arc-shaped web (208) and the upper surface of the arc-shaped transition wedge (209) are both in direct contact with the outer surface of the bottom arc-shaped plate (105), the lower surface of the bottom arc-shaped web (208), the lower surface of the arc-shaped transition wedge (209), and the outer surface of the bottom arc-shaped plate (105) not covered by the arc-shaped transition wedge (209) form a smooth curved surface, and the carbon fiber coating tape (15) covers the outer surface of the steel outer plate (11) in an annular manner along the cross-sectional contour of the tank body (1), as described in claim 6.

15. The support column (201) is cylindrical, and within the saddle region, the length of the carbon fiber coated tape (15) in the longitudinal direction of the tank is set to half the distance in the longitudinal direction between the centerlines of two adjacent support columns (201) in the longitudinal direction of the ship, and the carbon fiber coated tape (15) covers the outer surface of the steel outer plate (11) in an annular manner along the cross-sectional contour of the tank body (1), and when the carbon fiber coated tape (15) passes over the support column (201), the carbon fiber coated tape (15) first becomes tangential to the support column (201). The liquefied gas tank for ships according to claim 14, characterized in that it makes contact with the target, then with a part of the arc-shaped portion of the support column (201), and finally separates tangentially from the support column (201), and the two contact points between the same carbon fiber coated tape (15) and the same support column (201) are symmetrical with respect to the centerline of the support column (201) in the ship's longitudinal direction, and the contact point between an adjacent carbon fiber coated tape (15) and the same support column (201) is symmetrical with respect to the centerline of the support column (201) perpendicular to the ship's longitudinal direction.

16. The support column (201) is non-cylindrical, and on both the left and right sides of the bottom arc-shaped web (208), a plurality of fixing rivets (210) are provided at equal intervals along the longitudinal direction of the tank near the edges of the arc-shaped transition wedge (209), and within the saddle region, the length of the carbon fiber coating tape (15) in the longitudinal direction is set to half the distance between the centerlines of two adjacent fixing rivets (210) in the longitudinal direction, and the carbon fiber coating tape (15) covers the outer surface of the steel outer plate (11) in an annular manner along the cross-sectional contour of the tank body (1), and when the carbon fiber coating tape (15) passes over the fixing rivets (210), the carbon fiber coating tape (15) surrounds and covers the fixing rivets (210), as described in claim 14.

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