A marine cryogenic tank and a cold insulation system thereof

Abstract

The application discloses a marine low-temperature tank and relates to the technical field of material storage. The marine low-temperature tank comprises a tank body assembly, a damping assembly, a cold insulation system and a control processor. The tank body assembly comprises an outer shell, an insulating cavity and an inner container arranged in sequence from outside to inside. Annular supports are arranged on both sides of the outer surface of the inner container and inside the insulating cavity. The damping assembly comprises a truss fixed to the bottom of a ship, a supporting part and an adjusting part. The supporting part comprises a pressure monitoring part. The adjusting part comprises a first telescopic part, a second telescopic part, a third telescopic part and a fourth telescopic part. The cold insulation system comprises a pressure increasing gasifier with an installation height lower than the lowest liquid level of the tank body assembly, an air pipe connected to the inside of the inner container, a second liquid outlet pipe and a pressure increasing valve. The control processor is fixedly connected to the front side of the truss. The control processor is signal connected with the cold insulation system and the damping assembly. The device improves the stability of the storage tank body when it is inclined.

Description

Technical Field

[0001] This invention relates to the field of material storage technology, specifically to a marine cryogenic tank and its insulation system. Background Technology

[0002] Liquefied natural gas is typically stored in cryogenic storage tanks at -161.5 degrees Celsius and around 0.1 MPa. A dedicated cold insulation system is also required to keep the natural gas in a liquefied state.

[0003] During ship operation, ships typically experience a certain degree of swaying. Since tanks are often installed using rigid connections, this can lead to swaying and tilting in multiple directions, resulting in poor stability of the internal liquid storage. Therefore, improving the stability of marine tanks when tilted has become an urgent problem for those in the field. Summary of the Invention

[0004] The purpose of this invention is to provide a marine cryogenic tank and its insulation system to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a marine cryogenic tank, comprising: A tank assembly for storing liquid and maintaining liquid properties, the tank assembly comprising, from the outside to the inside, an outer shell, an insulation cavity, and an inner liner, wherein annular supports are provided on both sides of the outer surface of the inner liner and inside the insulation cavity, and the tank assembly further comprising a liquid inlet pipe, a first liquid outlet pipe, and a vacuum pipe; A shock-absorbing assembly is used to improve the stability of the tank assembly. The shock-absorbing assembly includes a truss fixed to the bottom of the ship, a support component, and an adjustment component. The support component includes a pressure monitoring component for determining the degree of tilt of the tank. The adjustment component includes a first telescopic part, a second telescopic part, a third telescopic part, and a fourth telescopic part. The adjustment component is used to apply and adjust the supporting force on the tank assembly in a timely manner. A cold preservation system is used to judge and maintain the low temperature state of the liquid in the tank in real time. The cold preservation system includes a booster vaporizer installed at a height lower than the lowest liquid level of the tank body components, an air pipe connected to the inside of the inner liner, a second liquid outlet pipe, and a booster valve. The control processor is fixedly connected to the front side of the truss, and the control processor is signal-connected to the cold insulation system and the shock absorption components.

[0006] The present invention further illustrates that the tank assembly and the truss are in a state of non-contact surface, the upper end of the truss is fixedly connected with a pad, and the truss is a multi-member interlocking integral welded structure.

[0007] The present invention further describes that the supporting component includes: The first I-beam frame, the second I-beam frame, and the third I-beam frame have their upper ends set with a certain curvature. A first damping shock absorber, a second damping shock absorber, and a third damping shock absorber are respectively hinged to the middle two sides of the first I-frame, the second I-frame, and the third I-frame; Anti-slip pads are connected to the upper surfaces of the first I-beam frame, the second I-beam frame, and the third I-beam frame.

[0008] The present invention further illustrates that a semi-ring frame is connected to the lower surface of the tank assembly.

[0009] The present invention further illustrates that the adjusting component further includes: A first base plate and a second base plate, wherein the first base plate is fixedly connected to the bottom of the first telescopic part and the bottom of the second telescopic part, and the second base plate is fixedly connected to the bottom of the third telescopic part and the bottom of the fourth telescopic part; The contact blocks are respectively hinged to the tops of the first telescopic part, the second telescopic part, the third telescopic part, and the fourth telescopic part; The first bottom plate and the second bottom plate are both fixedly connected to the bottom of the ship and are respectively located between the first I-beam and the second I-beam, and between the second I-beam and the third I-beam.

[0010] The present invention further describes that the pressure monitoring component includes: The first front pressure detection unit and the first rear pressure detection unit are respectively located on the front and rear sides of the upper surface of the first I-beam frame; The second front pressure detection unit and the second rear pressure detection unit are respectively located on the front and rear sides of the upper surface of the second I-beam frame; The third front pressure detection unit and the third rear pressure detection unit are respectively installed on the front and rear sides of the upper surface of the third I-beam frame; The first front pressure detection unit, the first rear pressure detection unit, the second front pressure detection unit, the second rear pressure detection unit, the third front pressure detection unit, and the third rear pressure detection unit are all located below the corresponding anti-slip pads.

[0011] Compared with the prior art, the beneficial effects achieved by the present invention are: By setting up shock-absorbing components and internal pressure monitoring devices, the degree of tilt of the tank is determined, the processor is controlled, and the specific tilt direction is precisely supported and the precise support length is applied based on the magnitude and location of the detected real-time pressure value, thereby improving the stability of the tank when tilting occurs. By combining the cold insulation system with the tilt and differential pressure detection units, the system can intelligently determine the leakage of liquid in the tank based on real-time differential pressure changes and tilt conditions, whether the tank is draining or not, and issue timely warnings to improve the safety of the equipment. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is the present invention. Figure 1 A diagram showing the breakdown; Figure 3 This is a schematic diagram of the support component of the present invention; Figure 4 This is a schematic diagram of a half-section of the tank assembly of the present invention; Figure 5 This is a schematic diagram of the connection between the cold preservation system and the pressure boosting valve of the present invention; Figure 6 This is a schematic diagram of the adjustment component area division of the present invention; Figure 7 This is the invention's ⊿G S -T curve diagram; In the diagram: 1. Tank assembly; 2. Truss; 3. Semi-ring frame; 4. Control processor; 5. First I-beam; 6. First damping shock absorber; 7. Second I-beam; 8. Second damping shock absorber; 9. Third I-beam; 10. Third damping shock absorber; 11. First telescopic section; 12. Second telescopic section; 13. Third telescopic section; 14. Fourth telescopic section; 15. First front pressure detection unit; 16. Anti-slip pad; 17. Liquid inlet pipe; 18. First liquid outlet pipe; 19. Vacuum pipe; 20. Differential pressure detection unit; 21. Outer shell; 22. Inner liner; 23. Insulation cavity; 24. Annular support; 25. Second liquid outlet pipe; 26. Gas pipe; 27. Pressure booster vaporizer; 28. Pressure booster valve; 29. ​​Pad; 30. First rear pressure detection unit. Implementation

[0013] The following detailed, non-limiting description of the technical solution of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0014] Example 1, please refer to Figure 1-5The present invention provides a technical solution: a marine cryogenic tank, including a tank assembly 1, a shock-absorbing assembly, and a cold insulation system connected to the tank assembly 1 and the shock-absorbing assembly. The tank assembly 1 is used to store liquid and maintain liquid properties. The shock-absorbing assembly is used to improve the stability of the tank assembly 1 when used on a ship. The cold insulation system is used to judge and ensure the low temperature state of the liquid in the tank in real time, and to make timely monitoring and early warning to ensure the safety of liquid use.

[0015] refer to Figure 1 The shock absorption component includes a truss 2, which adopts a multi-member interlaced integrated welding method to improve support stability. The tank assembly 1 is set above the truss 2. Under normal use, the tank assembly 1 and the truss 2 are in a non-contact state. The bottom of the truss 2 is fixedly connected to the bottom of the ship, and the upper end of the truss 2 is fixedly connected to a pad 29.

[0016] refer to Figure 2 , Figure 3 The shock absorption assembly also includes a support component and an adjustment component. The support component is used to support the tank assembly 1, and the adjustment component is used to apply and adjust the support force on the tank assembly 1 in a timely manner to further improve the support stability of the tank. The supporting components include a first I-beam 5, a second I-beam 7, and a third I-beam 9, which are evenly arranged inside the truss 2 and fixed to the contacting hull bottom. The upper ends of the first I-beam 5, the second I-beam 7, and the third I-beam 9 are set with a certain curvature. A set of first damping shock absorbers 6, a set of second damping shock absorbers 8, and a set of third damping shock absorbers 10 are respectively hinged on the middle two sides of the first I-beam 5, the second I-beam 7, and the third I-beam 9. When the hull tilts, they play a certain role in shock absorption and stabilization.

[0017] The upper surfaces of the first I-beam frame 5, the second I-beam frame 7, and the third I-beam frame 9 are all connected with anti-slip pads 16. The anti-slip pads 16 are used to increase the friction between the contacting objects, and can be easily replaced with anti-slip pads 16 of appropriate size and thickness according to the tank size within a certain size range allowed by the tank, thereby improving the applicability of the support components.

[0018] A semi-ring frame 3 is connected to the lower surface of the tank assembly 1. The lower surface of the semi-ring frame 3 is in contact with the anti-slip pad 16. The semi-ring frame 3 facilitates the adjustment of the support force of the adjustment components on the tank assembly 1 as a whole, while preventing wear on the surface of the tank assembly 1.

[0019] The adjustment components include a first telescopic part 11, a second telescopic part 12, a third telescopic part 13, and a fourth telescopic part 14, including but not limited to electric telescopic rods, hydraulic cylinder structures, or pneumatic cylinder structures, each connected to its respective starting power source. The bottom of the first telescopic part 11 and the second telescopic part 12 are fixedly connected to a first base plate, and the bottom of the third telescopic part 13 and the fourth telescopic part 14 are fixedly connected to a second base plate. The first base plate and the second base plate are both fixedly connected to the bottom of the ship and are respectively located between the first I-frame 5 and the second I-frame 7, and between the second I-frame 7 and the third I-frame 9. The top of the first telescopic part 11, the second telescopic part 12, the third telescopic part 13, and the fourth telescopic part 14 are all hinged with contact blocks, which can apply a supporting force to the semi-ring frame 3 and increase the friction between them.

[0020] The tank assembly 1 includes an outer shell 21, and an inner liner 22 is provided inside the outer shell 21. The inner liner 22 is used to store cryogenic liquid and withstand pressure and low temperature. An insulation cavity 23 is provided between the outer shell 21 and the inner liner 22. Annular supports 24 are provided on both sides of the outer surface of the inner liner 22 and inside the insulation cavity 23 to support and connect the inner liner 22. It should be noted that the outer shell 21 is made of container steel, the inner liner 22 is made of cryogenic alloy steel, and the insulation cavity 23 is filled with perlite. refer to Figure 4 , Figure 5 The tank assembly 1 also includes an inlet pipe 17, a first outlet pipe 18, and a vacuum pipe 19. The vacuum pipe 19 is connected to an external vacuum pump pipe and is used to evacuate the inside of the insulation chamber 23. One end of the inlet pipe 17 and the first outlet pipe 18 penetrates the surface of the inner liner 22 and is used for the entry and exit of liquid, respectively.

[0021] The cold insulation system includes a booster vaporizer 27, which is installed outside the tank assembly 1 and its installation height is lower than the lowest liquid level of the tank assembly 1. The booster vaporizer 27 can be an ambient temperature vaporizer. The principle of the booster vaporizer 27 is to use external heat to vaporize a small amount of low-temperature liquid into gas, which is then returned to the gas phase space of the container to pressurize the gas. The inner liner 22 has a gas pipe 26 and a second liquid outlet pipe 25 connected to the upper and lower parts of one side of its interior. The end of the second liquid outlet pipe 25 located outside the tank assembly 1 is connected to a pipe on one side of the booster vaporizer 27. The end of the gas pipe 26 located outside the tank assembly 1 is connected to a pipe on the other side of the booster vaporizer 27. A booster valve 28 is installed on this pipe for pressurization judgment. When the outlet pressure of the booster valve 28 is lower than the set value, it will open; when the pressure returns to above the set value, it will close. A control processor 4 is fixedly connected to the front side of the truss 2. The control processor 4 is connected to the cold insulation system and the shock absorption components. A control panel and control buttons are provided on the outer surface of the control processor 4 to receive detection data and make adjustments to the usage status of the tank.

[0022] In this embodiment, the truss 2 is pre-fixed to the envisioned ship bottom. Then, the first I-beam 5, the first base plate, the second I-beam 7, the second base plate, and the third I-beam 9 are interlaced and fixed to the ship bottom inside the truss 2 to complete the position fixation of the shock absorption component. Then, the semi-ring frame 3 is placed on the support component and contacts the anti-slip pad 16. Finally, the tank assembly 1 is placed inside the semi-ring frame 3. After the placement position is calibrated, the semi-ring frame 3 is fixed to the outer surface of the tank assembly 1. The fixing connection method includes, but is not limited to, snap-fit, plug-in, and bolt connection. The two parts of the connector are respectively set on the outer surface of the semi-ring frame 3 and the tank assembly 1. After the placement position is calibrated, the fixing connection is performed. It should be noted that this fixing connection method is not shown in the figure. After the connection, the semi-ring frame 3 will cause the tank assembly 1 to change.

[0023] After the tank assembly 1 is installed, the cold insulation system and the corresponding pipes connected to the tank assembly 1 are connected in sequence. Specifically, when the liquid is discharged from the first outlet pipe 18, the liquid level in the inner liner 22 will drop, the internal gas phase space will increase, and the internal pressure will drop. When the pressure in the inner liner 22 is lower than the set value of the pressure boosting valve 28, the liquid in the inner liner 22 will flow to the pressure boosting vaporizer 27 through the liquid level difference. Then the liquid vaporizes and is replenished to the inner liner 22 through the pressure boosting valve 28 and the gas pipe 26, so that the internal pressure of the inner liner 22 rises. When the pressure rises and reaches the set value of the pressure boosting valve 28, the pressure boosting valve 28 closes, thereby keeping the internal pressure and temperature in a balanced state.

[0024] When the hull tilts, the tilt of the tank assembly 1 is reduced by the installation of the first damping shock absorber 6, the second damping shock absorber 8, and the third damping shock absorber 10.

[0025] Example 2, based on Example 1, adds the following structure, refer to Figure 3 , Figure 4 The first I-beam frame 5 has a first front pressure detection unit 15 and a first rear pressure detection unit 30 respectively on the front and rear sides of its upper surface. Similarly, the second I-beam frame 7 has a second front pressure detection unit and a second rear pressure detection unit respectively on the front and rear sides of its upper surface. The third I-beam frame 9 has a third front pressure detection unit and a third rear pressure detection unit respectively on the front and rear sides of its upper surface. The first front pressure detection unit 15, the first rear pressure detection unit 30, the second front pressure detection unit, the second rear pressure detection unit, the third front pressure detection unit, and the third rear pressure detection unit are all located below the corresponding anti-slip pads 16. The first front pressure detection unit 15, the first rear pressure detection unit 30, the second front pressure detection unit, the second rear pressure detection unit, the third front pressure detection unit, and the third rear pressure detection unit constitute a pressure monitoring component, which is used to determine the degree of tilt of the tank and facilitate the control and adjustment components to provide precise support to the tank. The initial pressure values ​​of the first front pressure detection unit 15, the first rear pressure detection unit 30, the second front pressure detection unit, the second rear pressure detection unit, the third front pressure detection unit, and the third rear pressure detection unit after the tank is installed are F1 and F1, respectively. ’ F2, F2 ’ F3, F3 ’ ; The real-time pressure values ​​detected by the first front pressure detection unit 15, the first rear pressure detection unit 30, the second front pressure detection unit, the second rear pressure detection unit, the third front pressure detection unit, and the third rear pressure detection unit are recorded as f1, f1 ’ f2, f2 ’ f3, f3 ’ .

[0026] Among them, the control processor 4 simultaneously monitors the tilt degree of the tank and the actual pressure difference changes, and takes corresponding measures, specifically: First, the tilt of the tank has a certain directionality, as referenced Figure 6 The area where the adjustment component is located is divided into areas A, B, C, and D, which correspond to the support areas of the first telescopic part 11, the second telescopic part 12, the third telescopic part 13, and the fourth telescopic part 14 in sequence. Establish a function to find the extreme values, denoted as {f1, f2}. ’ f2, f2 ’ f3, f3 ’} MAX The system selects three maximum values ​​and compares them with their corresponding initial pressure values ​​to determine the following X tilt scenarios. When all three maximum values ​​are within the allowable pressure multiple of the corresponding initial pressure value, no adjustment is needed for the adjustment components, indicating a low degree of tilt. This allowable pressure multiple is set manually and depends on the shock absorption capacity of the support components and the natural environment conditions, and is usually taken as 1 to 1.2. When at least two of the three maximum values ​​are real-time pressure values ​​that exceed the allowable pressure multiple of their corresponding initial pressure values, it indicates a high degree of tilt. It should be noted that, according to the present invention, the adjustment component and support component are arranged with reference to... Figure 6 It is unlikely that only one real-time pressure value will change. Furthermore, since the tilt has a certain directionality, the three maximum values ​​are adjacent. Therefore, when a high degree of tilt occurs, the adjustment plan is as follows: If the maximum values ​​are f1 and f2 ’When f1 and f3 are in the same position, it indicates that the tank assembly 1 is tilted forward as a whole. The second telescopic part 12 and the fourth telescopic part 14 in the A and B areas extend to provide support. The extension length of the first telescopic part 11 and the second telescopic part 12 is determined according to the size of f1 and f3. If the maximum value is f1, f1 ’ When the tank assembly 1 is tilted to the right, the second telescopic part 11 and the first telescopic part 12 in areas A and C extend to provide support. The extension length of the first telescopic part 11 and the second telescopic part 12 is determined according to the size of f1 and f3. Similarly, when the whole structure tilts backward and to the left, the two corresponding telescopic parts extend to provide support when the maximum values ​​are on the same straight line. If the maximum values ​​are f1 and f2 ’ f1 ’ When this occurs, it indicates that the tank assembly 1 is tilted to the right front, and the second telescopic part 12 in area A extends out to provide support; Similarly, when the whole structure tilts to the right rear, left front, and left rear, and the maximum value forms a triangle, a corresponding telescopic part in the middle extends out to provide support. The length of the extended portion supported by the corresponding telescopic part is positively correlated with the pressure it receives.

[0027] This enables the determination of the tilt degree of tank component 1, and provides precise support in the specific tilt direction and applies precise support length based on the magnitude and location of the detected real-time pressure value.

[0028] In Example 3, based on Example 2, a differential pressure detection unit 20 is provided in the middle of the semi-ring frame 3. This unit is used to detect the vertical pressure value applied by the tank assembly 1 in real time, and to obtain the difference between the actual differential pressure change and the ideal differential pressure change by comparison. At the same time, the liquid leakage problem can be judged based on the difference value. Specifically, the ideal differential pressure range of the differential pressure detection unit 20 is recorded as [⊿G1, ⊿G2], which is the ideal differential pressure range obtained under the condition that the pressure inside the tank is maintained within a certain range under the action of the booster vaporizer 27 and the booster valve 28, and stored in the control processor 4; The real-time differential pressure of the differential pressure detection unit 20 is recorded as ΔG. S The differential pressure detection unit 20 transmits the real-time differential pressure to the control processor 4 in real time, establishes a real-time differential pressure curve, and compares it with the ideal differential pressure range for reference. Figure 7 ⊿G S -T curve, where T is the detection runtime.

[0029] When a tilt occurs in a single direction, the liquid flow within tank assembly 1 exhibits directional characteristics. However, when the tilt reaches a high degree, forming a triangular shape at its maximum value (i.e., multi-directional tilt), it indicates that the liquid flow within tank assembly 1 is non-directional, and the stability of the stored liquid is poor. The direction of this tilt will be determined based on the magnitude of the tilt and the real-time pressure difference ΔG. S Determine if a leakage problem exists and whether to issue a timely warning at control processor 4 to improve the safety of device use.

[0030] Specifically, a dangerous tilt coefficient a is set, which is taken from the pressure multiple. When the multiple between the maximum pressure value corresponding to the extended telescopic part and the initial pressure value reaches the dangerous tilt coefficient a, it indicates that the liquid fluctuation in the inner cavity 22 is high; otherwise, it is considered a stable condition. When multiple tilting occurs during liquid drainage, the real-time pressure difference of G should be measured first. S Comparison with the ideal differential pressure range: When the real-time pressure difference G S As long as the pressure differential remains within the ideal range, the drainage process continues; When the real-time pressure difference G S When phenomena outside the ideal pressure differential range occur: If the liquid experiences a phenomenon outside the ideal differential pressure range within a certain allowable fluctuation time t, but is considered to be a stable liquid condition, the draining process continues. If the liquid exhibits a phenomenon outside the ideal differential pressure range within a certain allowable fluctuation time t, but is considered to have high liquid volatility, the draining process is suspended until a stable condition is reached. If the liquid fluctuates beyond a certain allowable time t and is outside the ideal pressure differential range, the control processor 4 issues a warning. Scenario 1: When the liquid fluctuates significantly, drainage is suspended until the situation stabilizes. Scenario 2: When the liquid is stable, the pressure booster valve 28's set value is adjusted to increase the internal air intake. If the real-time pressure differential G is still present... S If the pressure difference is outside the ideal range, a leakage problem exists, and an alarm should be triggered.

[0031] When not discharging liquid, regardless of whether the liquid is highly volatile or stable, when the real-time pressure difference G... S If a phenomenon occurs that is outside the ideal pressure differential range, the control processor will issue a timely warning and notify the staff to carry out maintenance.

[0032] Through the above process, the system can intelligently determine the leakage of liquid in the tank based on real-time pressure difference changes and tilt conditions, and issue timely warnings to improve the safety of the equipment.

[0033] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, 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, and therefore should not be construed as a limitation of this invention.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A marine cryogenic tank, characterized in that: include: The tank assembly (1) is used to store liquid and maintain liquid properties. The tank assembly (1) includes an outer shell (21), an insulation cavity (23), and an inner liner (22) arranged sequentially from the outside to the inside. The inner liner (22) has annular supports (24) on both sides of its outer surface and inside the insulation cavity (23). The tank assembly (1) also includes a liquid inlet pipe (17), a first liquid outlet pipe (18), and a vacuum pipe (19). A shock-absorbing component is used to improve the stability of the tank assembly (1). The shock-absorbing component includes a truss (2) fixed to the bottom of the ship, a support component and an adjustment component. The support component includes a pressure monitoring component for judging the tilt of the tank. The adjustment component includes a first telescopic part (11), a second telescopic part (12), a third telescopic part (13) and a fourth telescopic part (14). The adjustment component is used to apply and adjust the supporting force on the tank assembly (1) in a timely manner. The cold preservation system is used to judge and ensure the low temperature state of the liquid in the tank in real time. The cold preservation system includes a booster vaporizer (27) installed at a height lower than the lowest liquid level of the tank assembly (1), an air pipe (26) connected to the inside of the inner liner (22), a second liquid outlet pipe (25), and a booster valve (28). The control processor (4) is fixedly connected to the front side of the truss (2), and the control processor (4) is signal connected to the cold insulation system and the shock absorption components; The support component also includes: The first I-frame (5), the second I-frame (7), and the third I-frame (9) have their upper ends set with a certain curvature. A first damping shock absorber (6), a second damping shock absorber (8), and a third damping shock absorber (10) are respectively hinged to the middle sides of the first I-frame (5), the second I-frame (7), and the third I-frame (9); Anti-slip pad (16) is connected to the upper surfaces of the first I-frame (5), the second I-frame (7), and the third I-frame (9); The adjustment component further includes: The first base plate and the second base plate are fixedly connected to the bottom of the first telescopic part (11) and the second telescopic part (12), and the second base plate is fixedly connected to the bottom of the third telescopic part (13) and the fourth telescopic part (14). The contact blocks are respectively hinged to the tops of the first telescopic part (11), the second telescopic part (12), the third telescopic part (13), and the fourth telescopic part (14); The first bottom plate and the second bottom plate are both fixedly connected to the bottom of the ship and are respectively located between the first I-frame (5) and the second I-frame (7), and between the second I-frame (7) and the third I-frame (9); The pressure monitoring component includes: The first front pressure detection unit (15) and the first rear pressure detection unit (30) are respectively provided on the front and rear sides of the upper surface of the first I-frame (5); The second front pressure detection unit and the second rear pressure detection unit are respectively set on the front and rear sides of the upper surface of the second I-frame (7); The third front pressure detection unit and the third rear pressure detection unit are respectively set on the front and rear sides of the upper surface of the third I-frame (9); The first front pressure detection unit (15), the first rear pressure detection unit (30), the second front pressure detection unit, the second rear pressure detection unit, the third front pressure detection unit, and the third rear pressure detection unit are all located below the corresponding anti-slip pad (16); The initial pressure values ​​of the first front pressure detection unit (15), the first rear pressure detection unit (30), the second front pressure detection unit, the second rear pressure detection unit, the third front pressure detection unit, and the third rear pressure detection unit after the tank is installed are recorded as follows: The real-time pressure value detected is recorded as ; The adjustment component divides the area into regions A, B, C, and D, which correspond to the support areas of the first telescopic part (11), the second telescopic part (12), the third telescopic part (13), and the fourth telescopic part (14) in sequence. Establish an extremum function, for The system sets three maximum values ​​and compares them with the corresponding initial pressure values ​​to determine the tilt. The extension length supported by the telescopic part is positively correlated with the pressure it receives.

2. A marine cryogenic tank according to claim 1, characterized in that: The tank assembly (1) and the truss (2) are in a non-contact state. The upper end of the truss (2) is fixedly connected with a pad (29). The truss (2) is a multi-member interlocking integral welded structure.

3. A marine cryogenic tank according to claim 2, characterized in that: The lower surface of the tank assembly (1) is connected to a semi-ring frame (3).

4. A marine cryogenic tank according to claim 3, characterized in that: The middle part of the semi-ring frame (3) is provided with a differential pressure detection unit (20) for real-time detection of the vertical pressure value applied by the tank assembly (1), and by comparison, the difference between the actual differential pressure change and the ideal differential pressure change can be obtained. At the same time, the liquid leakage problem can be judged based on the difference value.

5. A marine cryogenic tank according to claim 4, characterized in that: The ideal differential pressure range of the differential pressure detection unit (20) in the control processor (4) is [⊿G1, ⊿G2], and the real-time differential pressure of the differential pressure detection unit (20) is ⊿G S Establish a real-time differential pressure curve and compare it with the ideal differential pressure range.

6. A marine cryogenic tank according to claim 5, characterized in that: Set a dangerous tilt coefficient a to determine whether the liquid in the inner cavity (22) is in a highly volatile or stable state.

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