Method and device for installing a liquid cargo tank

Abstract

The application belongs to the technical field of liquid cargo tank installation, and discloses a liquid cargo tank installation method and a liquid cargo tank installation device. In the liquid cargo tank installation method, the liquid cargo tank is lifted by a lifting structure and moved above the tank; the liquid cargo tank is lowered until the distance between the tank bottom of the liquid cargo tank and the multiple oil tops is not more than a preset distance; the multiple oil tops are controlled to extend simultaneously to lift the liquid cargo tank and remove the lifting structure from the liquid cargo tank, so that the liquid cargo tank is completely supported by the multiple oil tops and no longer needs to be lifted by the lifting structure; and the multiple oil tops are controlled to descend to support the liquid cargo tank on the support seat, so that the impact force between the liquid cargo tank and the support seat during the lowering process of the liquid cargo tank is avoided to be too large, and the lowering process of the liquid cargo tank is more stable.

Description

Technical Field

[0001] This invention relates to the field of liquid cargo tank installation technology, and more particularly to liquid cargo tank installation methods and devices. Background Technology

[0002] Gas carriers are vessels specifically designed for transporting liquefied gases or other special media. They require a certain number of cargo tanks, and the installation and positioning of these tanks is a crucial step in the entire shipbuilding process. Currently, the installation process typically involves using a crane to lift the cargo tank, positioning it, and then slowly lowering it to its designated location within the ship's hold. However, this method has a problem: the lowering of the cargo tanks relies entirely on the crane, which can easily cause significant impact when the tanks come into contact with the ship's hold. Summary of the Invention

[0003] According to one aspect of the present invention, a method for installing a liquid cargo tank is provided to solve the problem that in the prior art, the lowering of liquid cargo tanks relies entirely on cranes, which can easily cause a large impact when the liquid cargo tank comes into contact with the ship's hold.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A liquid cargo tank installation method is implemented using a liquid cargo tank installation device, which is installed inside the ship's hold and includes multiple support seats for installation in the ship's hold, at least some of which are equipped with oil jacks; the liquid cargo tank installation method includes: S100: The liquid cargo tank is lifted by the lifting structure and moved above the ship's hold; S200: Lower the liquid cargo tank until the distance between the bottom of the liquid cargo tank and the multiple oil tank tops does not exceed a preset distance; S300: Control multiple oil jacks to extend simultaneously to lift the liquid cargo tank and remove the lifting structure from the liquid cargo tank; S400: Control the descent of multiple oil tops to support the cargo tank on the support base.

[0005] As a preferred embodiment of the liquid cargo tank installation method, step S200 includes: S2001: Lower the liquid cargo tank to the preset position; S2002: Adjust the horizontal position of the liquid cargo tank using a hand chain hoist; S2003: Continue lowering the liquid cargo tank until the distance between the bottom of the liquid cargo tank and the multiple oil tank tops does not exceed the preset distance.

[0006] As a preferred embodiment of the liquid cargo tank installation method, the liquid cargo tank is coated with a first identification line, and the ship's hold is coated with a second identification line; Step S200 also includes the steps between S2002 and S2003: S20021: Determine that the first marking line of the liquid cargo tank and the second marking line of the ship's hold are located in the same vertical plane.

[0007] As a preferred embodiment of the liquid cargo tank installation method, the method also includes steps between S300 and S400: S310: Adjust the extension amount of the plurality of oil tops so that the distance between the bottom of the liquid cargo tank and the plurality of support seats is within a first preset range; S320: Fill the space between the plurality of said supports and the bottom of the liquid cargo tank with epoxy resin and cure the filled epoxy resin.

[0008] As a preferred method for installing liquid cargo tanks, the following steps are also included after step S400: S500: Determine the thickness of the filled epoxy resin within a second preset range. S600: Continue to control the descent of the multiple oil jacks, and after the multiple oil jacks have separated from the bottom of the cargo tank, remove the multiple oil jacks.

[0009] According to another aspect of the present invention, a liquid cargo tank installation apparatus is provided for implementing the above-described liquid cargo tank installation method. The liquid cargo tank installation apparatus is disposed in a ship's hold and includes a plurality of support seats for installation in the ship's hold, at least a portion of the support seats being fitted with oil caps.

[0010] As a preferred embodiment of the liquid cargo tank installation device, the tank interior is further provided with an anti-sway seat, the anti-sway seat having a receiving groove, and the bottom of the liquid cargo tank is provided with an anti-sway block, the anti-sway block being installed in the receiving groove.

[0011] As a preferred embodiment of the liquid cargo tank installation device, multiple anti-sway seats are provided, forming two rows of anti-sway seat groups. In one row of anti-sway seat groups, multiple anti-sway seats are arranged sequentially along the length direction of the tank; in the other row of anti-sway seat groups, multiple anti-sway seats are arranged sequentially along the width direction of the tank. Multiple anti-sway blocks are provided at the bottom of the liquid cargo tank, and the multiple anti-sway blocks are installed one-to-one in multiple receiving slots.

[0012] As a preferred embodiment of the liquid cargo tank installation device, the bottom of the liquid cargo tank is provided with multiple support blocks, and the multiple support blocks can be supported one-to-one on multiple support seats.

[0013] As a preferred embodiment of the liquid cargo tank installation device, the number of oil tops is even, and the multiple oil tops are symmetrically arranged along the centerline of the tank.

[0014] The beneficial effects of this invention are: This invention provides a method for installing a liquid cargo tank, implemented using a liquid cargo tank installation device located inside the ship's hold and including multiple support seats for installation within the hold, with at least some of the support seats equipped with oil jacks. In the method, the liquid cargo tank is lifted by a lifting structure and moved above the ship's hold; the liquid cargo tank is lowered until the distance between the tank floor and the multiple oil jacks does not exceed a preset distance; the multiple oil jacks are simultaneously extended to lift the liquid cargo tank, and the lifting structure is removed from the tank, thus allowing the liquid cargo tank to be fully supported by the multiple oil jacks, eliminating the need for lifting the tank by the lifting structure; the multiple oil jacks are then lowered to support the liquid cargo tank on the support seats, thereby preventing excessive impact force between the liquid cargo tank and the support seats during lowering and ensuring a smoother lowering process.

[0015] The present invention also provides a liquid cargo tank installation device for implementing the above-described liquid cargo tank installation method. The liquid cargo tank installation device is installed inside the ship's hold and includes multiple support seats for installation in the ship's hold. At least some of the support seats are equipped with oil jacks. During the lowering of the liquid cargo tank, when the distance between the bottom of the liquid cargo tank and the multiple oil jacks does not exceed a preset distance, the liquid cargo tank can be supported by the multiple oil jacks together, eliminating the need to lift the liquid cargo tank using a lifting structure. Subsequently, the multiple oil jacks are controlled to descend so that the liquid cargo tank is supported on the support seats, thereby avoiding excessive impact force between the liquid cargo tank and the support seats during the lowering process, making the lowering process of the liquid cargo tank more stable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the liquid cargo tank and the ship's hold in an embodiment of the present invention; Figure 2 This is a diagram showing the positional distribution of the support base and the anti-sway base in an embodiment of the present invention; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 This is a first structural schematic diagram of the anti-sway seat and anti-sway block in an embodiment of the present invention; Figure 5 This is a schematic diagram of the second structure of the anti-sway seat and anti-sway block in an embodiment of the present invention; Figure 6 This is a first structural schematic diagram of the support base and support block in an embodiment of the present invention; Figure 7 yes Figure 6 Enlarged view of point B in the middle; Figure 8 This is a schematic diagram of the second structure of the support base and support block in an embodiment of the present invention; Figure 9 yes Figure 8 Enlarged view of point C in the middle; Figure 10 This is a first flowchart of the liquid cargo tank installation method in an embodiment of the present invention; Figure 11 This is the second flowchart of the liquid cargo tank installation method in this embodiment of the invention.

[0017] In the picture: 1. Cargo tank; 11. Anti-sway block; 12. Support block; 2. Ship's cabin; 3. Support base; 4. Oil top; 5. Lifting structure; 6. Anti-shake seat; 61. Receiving groove. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0019] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0022] Gas carriers are vessels specifically designed for transporting liquefied gases or other special media. They require a certain number of cargo tanks, and the installation and positioning of these tanks is a crucial step in the entire shipbuilding process. Currently, the installation process typically involves using a crane to lift the cargo tank, positioning it, and then slowly lowering it to its designated location within the ship's hold. However, this method has a problem: the lowering of the cargo tanks relies entirely on the crane, which can easily cause significant impact when the tanks come into contact with the ship's hold.

[0023] In response, this embodiment provides a liquid cargo tank installation method and a liquid cargo tank installation device to solve the problem that in the prior art, the lowering of liquid cargo tanks relies entirely on cranes, which can easily cause a large impact when the liquid cargo tank comes into contact with the ship's hold. This method can be used in the field of liquid cargo tank installation technology.

[0024] Reference Figures 1-9 The liquid cargo tank installation device is set inside the ship compartment 2 and includes multiple support seats 3 for installation in the ship compartment 2. At least some of the support seats 3 are equipped with oil tops 4. All of the multiple support seats 3 are used to support the liquid cargo tank 1. During the lowering of the liquid cargo tank 1, when the distance between the bottom of the liquid cargo tank 1 and the multiple oil tops 4 does not exceed the preset distance, the liquid cargo tank 1 can be supported by the multiple oil tops 4 together, and it is no longer necessary to lift the liquid cargo tank 1 by the lifting structure 5. Subsequently, the multiple oil tops 4 are controlled to descend so that the liquid cargo tank 1 is supported on the support seats 3, thereby avoiding excessive impact force between the liquid cargo tank 1 and the support seats 3 during the lowering of the liquid cargo tank 1, making the lowering process of the liquid cargo tank 1 more stable.

[0025] Continue to refer to Figures 1-9 The ship's hold 2 is also equipped with an anti-sway seat 6, which has a receiving groove 61. An anti-sway block 11 is installed at the bottom of the cargo tank 1, and the anti-sway block 11 is installed within the receiving groove 61. Thus, during the installation of the cargo tank 1, the anti-sway block 11 and the receiving groove 61 can be used to position the cargo tank 1 and limit its position relative to the ship's hold 2, preventing the cargo tank 1 from swaying relative to the ship's hold 2. Figures 4-5 The diagram illustrates the positional relationship between the anti-sway block 11 and the receiving tank 61 during the lowering of the liquid cargo tank 1. Optionally, a pressure-bearing wooden block is also provided between the anti-sway block 11 and the bottom wall of the receiving tank 61.

[0026] Continue to refer to Figures 1-9 Multiple anti-sway seats 6 are provided, forming two rows of anti-sway seat groups. In one row, the anti-sway seats 6 are arranged sequentially along the length of the cargo hold 2; in the other row, they are arranged sequentially along the width of the cargo hold 2. Multiple anti-sway blocks 11 are provided at the bottom of the cargo tank 1, and these blocks are installed one-to-one in multiple receiving slots 61. This allows for improved positioning accuracy through the cooperation between the anti-sway seats 6 and the anti-sway blocks 11. Optionally, the centerline of one row of anti-sway seats arranged sequentially along the length of the cargo hold 2 coincides with the centerline of the cargo hold 2.

[0027] Continue to refer to Figures 1-9 The bottom of the liquid cargo tank 1 is equipped with multiple support blocks 12, which can be supported one-to-one on multiple support seats 3, thereby preventing the bottom of the liquid cargo tank 1 from directly contacting the support seats 3 and further improving the stability of the support. The support seats 3 can be arranged in two different ways, one of which is as follows: Figure 6 As shown, the distance between this support 3 and other adjacent support 3 is relatively large. This arrangement is generally suitable for the middle part to simplify the structure. Another type is... Figure 7 As shown, the distance between the support 3 and other adjacent support 3 is relatively close. This arrangement is generally suitable for edge parts to improve the stability of the support.

[0028] Continue to refer to Figures 1-9 The number of oil tankers 4 is even, and the multiple oil tankers 4 are symmetrically arranged along the centerline of the cargo tank 2. That is, the number of support seats 3 for the oil tankers 4 is even, and the multiple support seats 3 for the oil tankers 4 are symmetrically arranged along the centerline of the cargo tank 2. This ensures that the support points are evenly distributed when multiple oil tankers 4 jointly support the cargo tank 1, thereby improving the stability of the support. Optionally, the total number of support seats 3 is also even, and the multiple support seats 3 are symmetrically arranged along the centerline of the cargo tank 2. The number of oil tankers 4 is not less than 10, and the number of support seats 3 is not less than 20. This embodiment exemplarily provides a scheme with 16 oil tankers 4 and 40 support seats 3. In other embodiments, other numbers of oil tankers 4 and other numbers of support seats 3 can be selected according to actual needs.

[0029] This embodiment also provides a liquid cargo tank installation method, which is implemented by the liquid cargo tank installation device described above.

[0030] Reference Figure 10 The main process for installing liquid cargo tanks is as follows.

[0031] S100: The liquid cargo tank 1 is lifted by the lifting structure 5 and moved above the ship's hold 2.

[0032] S200: Lower the liquid cargo tank 1 until the distance between the bottom of the liquid cargo tank 1 and the multiple oil tops 4 does not exceed the preset distance.

[0033] The preset distance can be set in advance according to the actual situation. The value should be moderate to ensure that the bottom of the liquid cargo tank 1 has not yet come into contact with the support base 3, and at the same time, to ensure that the distance between the bottom of the liquid cargo tank 1 and the top of the oil roof 4 is not too large. In this embodiment, the preset distance is specifically 50mm.

[0034] S300: Controls multiple oil jacks 4 to extend simultaneously to lift the cargo tank 1 and remove the lifting structure 5 from the cargo tank 1.

[0035] This step allows the cargo tank 1 to be fully supported by multiple oil tops 4, eliminating the need to lift the cargo tank 1 using the lifting structure 5.

[0036] S400: Controls the descent of multiple oil tops 4 so that the liquid cargo tank 1 is supported on the support base 3.

[0037] This step helps to avoid excessive impact force between the liquid cargo tank 1 and the support base 3 during the lowering process, making the lowering process of the liquid cargo tank 1 more stable.

[0038] Reference Figure 11 The detailed procedure for installing liquid cargo tanks is as follows.

[0039] S100: The liquid cargo tank 1 is lifted by the lifting structure 5 and moved above the ship's hold 2.

[0040] S200: Lower the liquid cargo tank 1 until the distance between the bottom of the liquid cargo tank 1 and the multiple oil tops 4 does not exceed the preset distance.

[0041] Specifically, step S200 includes steps S2001 to S2003.

[0042] S2001: Lower the liquid cargo tank 1 to the preset position.

[0043] When the liquid cargo tank 1 is in the preset position, the distance between the bottom of the liquid cargo tank 1 and the oil top 4 should be slightly greater than the preset distance, so as to reserve a certain amount of operating space for subsequent adjustments.

[0044] S2002: Adjust the horizontal position of the liquid cargo tank 1 using a hand-operated hoist.

[0045] Since there may be horizontal errors during the process of lowering the liquid cargo tank 1 through the lifting structure 5, this step can adjust the horizontal position of the liquid cargo tank 1 so that the support block 12 is aligned with the support base 3, and the anti-sway block 11 is aligned with the receiving tank 61.

[0046] S2003: Continue lowering the liquid cargo tank 1 until the distance between the bottom of the liquid cargo tank 1 and the multiple oil tops 4 does not exceed the preset distance.

[0047] Optionally, the cargo tank 1 is coated with a first identification line, and the ship tank 2 is coated with a second identification line. Step S200 also includes step S20021, which is located between steps S2002 and S2003.

[0048] S20021: Determine that the first marking line of liquid cargo tank 1 and the second marking line of ship tank 2 are located in the same vertical plane.

[0049] This allows operators to correct the horizontal position of the cargo tank 1 using pre-set first and second marker lines. Optionally, the second marker line is the centerline of the tank 2.

[0050] S300: Controls multiple oil jacks 4 to extend simultaneously to lift the cargo tank 1 and remove the lifting structure 5 from the cargo tank 1.

[0051] S310: Adjust the extension of multiple oil tops 4 so that the distance between the bottom of the cargo tank 1 and multiple support seats 3 is within the first preset range.

[0052] S320: Epoxy resin is filled between multiple support seats 3 and the bottom of the cargo tank 1, and the filled epoxy resin is cured.

[0053] Through steps S310-S320, a certain gap can be reserved between the bottom of the liquid cargo tank 1 and the multiple support seats 3, and epoxy resin is filled into the gap and cured. In this way, the liquid cargo tank 1 is supported by the epoxy resin material, thereby improving the stability and rigidity of the support structure.

[0054] The first preset range can be preset according to the design thickness of the epoxy resin. In this embodiment, the first preset range is specifically 155mm~165mm.

[0055] S400: Controls the descent of multiple oil tops 4 so that the liquid cargo tank 1 is supported on the support base 3.

[0056] S500: Determine the thickness of the filled epoxy resin within a second preset range.

[0057] The second preset range is the design thickness of the epoxy resin. This step ensures that the thickness of the filled epoxy resin is within the second preset range, thus meeting the design requirements. At this point, it can be confirmed that the liquid cargo tank 1 has been stably installed inside the ship's compartment 2.

[0058] S600: Continue to control the descent of multiple oil tops 4, and remove multiple oil tops 4 after they have all separated from the bottom of the cargo tank 1.

[0059] After completing the above steps, it has been stably installed in the cabin 2, so the oil cap 4 is no longer needed. At this point, the multiple oil caps 4 can be removed.

[0060] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this invention is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-disclosed concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this invention.

Claims

1. A method for installing a liquid cargo tank, characterized in that, The liquid cargo tank installation is carried out by a liquid cargo tank installation device, which is located inside the ship's hold (2) and includes a plurality of support seats (3) for installation in the ship's hold (2), at least some of the support seats (3) being equipped with oil caps (4); the liquid cargo tank installation method includes: S100: The liquid cargo tank (1) is lifted by the lifting structure (5) and moved above the tank (2); S200: Lower the liquid cargo tank (1) until the distance between the bottom of the liquid cargo tank (1) and the multiple oil tops (4) does not exceed the preset distance; S300: Control multiple oil tops (4) to extend simultaneously to lift the liquid cargo tank (1) and remove the lifting structure (5) from the liquid cargo tank (1). S400: Control the multiple oil tops (4) to descend so that the liquid cargo tank (1) is supported on the support base (3).

2. The liquid cargo tank installation method according to claim 1, characterized in that, Step S200 includes: S2001: Lower the liquid cargo tank (1) to the preset position; S2002: Adjust the horizontal position of the liquid cargo tank (1) using a hand chain hoist; S2003: Continue to lower the liquid cargo tank (1) until the distance between the bottom of the liquid cargo tank (1) and the multiple oil tops (4) does not exceed the preset distance.

3. The liquid cargo tank installation method according to claim 2, characterized in that, The liquid cargo tank (1) is coated with a first marking line, and the ship's hold (2) is coated with a second marking line; Step S200 also includes the steps between S2002 and S2003: S20021: Determine that the first marking line of the liquid cargo tank (1) and the second marking line of the ship compartment (2) are located in the same vertical plane.

4. The liquid cargo tank installation method according to claim 1, characterized in that, It also includes the steps between S300 and S400: S310: Adjust the extension of the plurality of oil tops (4) so ​​that the distance between the bottom of the liquid cargo tank (1) and the plurality of support seats (3) is within a first preset range; S320: Fill the space between the plurality of said support seats (3) and the bottom of said cargo tank (1) with epoxy resin and cure the filled epoxy resin.

5. The liquid cargo tank installation method according to claim 4, characterized in that, It also includes the steps following step S400: S500: Determine the thickness of the filled epoxy resin within a second preset range. S600: Continue to control the descent of the multiple oil tops (4), and after the multiple oil tops (4) have separated from the bottom of the liquid cargo tank (1), remove the multiple oil tops (4).

6. A liquid cargo tank installation device, characterized in that, For implementing the liquid cargo tank installation method as described in any one of claims 1-5, the liquid cargo tank installation device is disposed in the ship compartment (2) and includes a plurality of support seats (3) for installation in the ship compartment (2), at least a portion of the support seats (3) being fitted with oil caps (4).

7. The liquid cargo tank installation device according to claim 6, characterized in that, The cabin (2) is also provided with an anti-sway seat (6), which has a receiving groove (61). The bottom of the liquid cargo tank (1) is provided with an anti-sway block (11), which is used to be installed in the receiving groove (61).

8. The liquid cargo tank installation device according to claim 7, characterized in that, Multiple anti-sway seats (6) are provided, and the multiple anti-sway seats (6) form two rows of anti-sway seat groups. In one row of anti-sway seat groups, multiple anti-sway seats (6) are arranged sequentially along the length direction of the cabin (2); in the other row of anti-sway seat groups, multiple anti-sway seats (6) are arranged sequentially along the width direction of the cabin (2). Multiple anti-sway blocks (11) are provided at the bottom of the liquid cargo tank (1), and the multiple anti-sway blocks (11) are installed one-to-one in the multiple receiving slots (61).

9. The liquid cargo tank installation device according to claim 6, characterized in that, The bottom of the liquid cargo tank (1) is provided with multiple support blocks (12), and the multiple support blocks (12) can be supported one-to-one on multiple support seats (3).

10. The liquid cargo tank installation device according to claim 6, characterized in that, The number of oil caps (4) is even, and multiple oil caps (4) are symmetrically arranged along the center line of the cabin (2).

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