Integrated maintenance system for LPG ship cargo tank

Abstract

The invention discloses an integrated maintenance system for an LPG ship cargo tank, and the system comprises a cargo tank maintenance channel part which is disposed on an LPG ship, the cargo tank maintenance channel part comprises an upper-layer maintenance channel, a middle-layer maintenance channel and a lower-layer maintenance channel, and the upper-layer maintenance channel is disposed on the cargo tank of the LPG ship in a surrounding manner; the middle-layer maintenance channel is arranged on the cargo tank in a surrounding manner; the lower-layer maintenance channel is arranged on the cargo tank in a surrounding manner; the automatic inspection part comprises an inspection supporting part and an inspection part, the inspection supporting part is arranged on the cargo tank overhaul channel part, and the inspection part is arranged on the inspection supporting part and used for automatically inspecting all electrical and sensors on the upper-layer overhaul channel, the middle-layer overhaul channel and the lower-layer overhaul channel. The device is reasonable in structural design, small in occupied space, high in bearing capacity, high in construction efficiency, high in automatic inspection efficiency and high in inspection reliability.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and more specifically, to an integrated maintenance system for LPG ship cargo tanks. Background Technology

[0002] LPG (Liquefied Petroleum Gas) carriers are specialized vessels designed for transporting liquefied petroleum gas at sea. The core of an LPG carrier is its specially designed cargo hold system for the safe storage and transport of cryogenic or high-pressure liquefied gas. Main types include:

[0003] Fully pressurized: The cargo hold is designed to withstand the saturated vapor pressure of liquefied gas at ambient temperature (typically high). Cargo is transported at near-ambient temperatures, but requires heavy-duty pressure-resistant tanks. Commonly found on smaller coastal or inland waterway vessels.

[0004] Semi-cooled and semi-pressurized: The cargo hold can withstand both a certain amount of pressure and low temperatures (usually around -48°C). This type combines the advantages of pressure and low temperature, offering high flexibility and is one of the most common types of LPG carriers, capable of transporting a variety of cargoes;

[0005] Fully Refrigerated: Cargo holds are designed to store deeply frozen liquefied petroleum gas (LPG) at or near atmospheric pressure (typically around -50°C). These holds require highly efficient insulation systems to maintain the low temperatures. This type is typically used on large ocean-going vessels with greater transport capacity, but requires more sophisticated refrigeration and reliquefaction equipment.

[0006] Semi-cooled and semi-pressurized LPG cargo tanks require insulation. During ship operation, maintenance and periodic inspections are necessary, necessitating platforms around the tanks for personnel access. These platforms also facilitate on-site construction. However, existing platforms for semi-cooled and semi-pressurized LPG cargo tanks suffer from poor structural design, resulting in large space requirements, poor structural stability, long construction periods, and significant material and welding work. Furthermore, existing maintenance access is only suitable for routine crew inspections, hindering automated daily inspections and significantly increasing the number of crew members and shipping costs. Summary of the Invention

[0007] To overcome the above-mentioned shortcomings, the present invention provides an integrated maintenance system for LPG ship cargo tanks, specifically adopting the following technical solution:

[0008] An integrated maintenance system for LPG ship cargo tanks includes:

[0009] A cargo tank maintenance access system is installed on an LPG vessel. The cargo tank maintenance access system includes an upper maintenance access, a middle maintenance access, and a lower maintenance access. The upper maintenance access surrounds the cargo tank of the LPG vessel; the middle maintenance access surrounds the cargo tank; and the lower maintenance access surrounds the cargo tank.

[0010] The automatic inspection component includes an inspection support and an inspection component. The inspection support is installed on the maintenance passage of the cargo tank, and the inspection component is on the inspection support to automatically inspect each electrical component and sensor on the upper maintenance passage, the middle maintenance passage, and the lower maintenance passage.

[0011] Preferably, the upper maintenance passage includes a structural platform, triangular ribs, a grating, and guardrails. The structural platform is arranged circumferentially around the outer wall of the cargo tank. The triangular ribs are supported on the structural platform and the cargo tank to improve the structural strength of the structural platform. The guardrails are arranged on the outer side of the structural platform, and the gratings are arranged on the structural platform for crew members to walk on.

[0012] Preferably, the middle-level maintenance channel has the same structure as the upper-level maintenance channel, and the middle-level maintenance channel is horizontally arranged around the perimeter of the cargo tank below the upper-level maintenance channel; the lower-level maintenance channel has the same structure as the upper-level maintenance channel, and the lower-level maintenance channel is horizontally arranged around the perimeter of the cargo tank below the middle-level maintenance channel.

[0013] Preferably, the inspection support includes a support connecting rod and an inspection support slide rail. One end of the support connecting rod is disposed on the guardrail or the structural platform, and the support connecting rod is located outside the guardrail and the structural platform. The inspection support slide rail is disposed along the upper maintenance channel on the other end of the plurality of support connecting rods to provide sliding support for the inspection component.

[0014] Preferably, the inspection component includes an automatic inspection sliding power component and an automatic inspection camera component. The automatic inspection sliding power component is slidably mounted on the inspection support component, and the automatic inspection camera component is mounted on the automatic inspection sliding power component to automatically inspect various electrical components and sensors.

[0015] Preferably, the automatic inspection sliding power component includes an inspection sliding seat and a sliding inspection power component. The inspection sliding seat is slidably disposed on the inspection support slide rail, and the sliding inspection power component provides sliding power on the inspection sliding seat.

[0016] Preferably, the inspection sliding seat includes an inspection sliding support plate, a support shaft, a first gear, a pulley, and a sliding buckle plate. The inspection sliding support plate is slidably mounted on the inspection support slide rail. One end of the support shaft is mounted on the bottom surface of the inspection sliding support plate, and two support shafts are symmetrically arranged on the inspection sliding support plates on both sides of the inspection support slide rail. The first gear is rotatably mounted on one of the support shafts, and the first gear meshes with the gear teeth on the inner sidewall of the inspection support slide rail. The pulley is rotatably mounted on the other support shaft, and the pulley sidewall is rollingly connected to the outer sidewall of the inspection support slide rail. One end of the sliding buckle plate is mounted on the other end of the support shaft, and the other end of the sliding buckle plate extends to the bottom surface of the inspection support slide rail. The two sliding buckles correspond one-to-one with the two support shafts. After the multiple inspection sliding seats are hinged end to end, they are all slidably mounted on the inspection support slide rail.

[0017] Preferably, the sliding inspection power component includes a motor, a second gear, and a power battery. The motor is mounted on one of the inspection sliding seats at one end, and the motor shaft rotates through the inspection sliding support plate. The second gear is mounted on the motor shaft and meshes with the gear teeth. The power battery is mounted on one of the inspection sliding seats at the other end and is electrically connected to the motor.

[0018] Preferably, the automatic inspection camera includes an inspection support transmission component and an inspection camera. The inspection support transmission component moves along the inspection sliding seat, and the inspection camera is mounted on the inspection support transmission component to automatically inspect various electrical components and sensors.

[0019] Preferably, the inspection support transmission component includes an inspection support telescopic tube and a linear actuator, both of which are mounted on the inspection sliding support plate; the inspection camera is mounted on the inspection support telescopic tube and connected to the linear actuator to adjust the height of the inspection camera and improve inspection efficiency.

[0020] The present invention has at least the following beneficial effects:

[0021] 1) The integrated maintenance system for LPG ship cargo tanks of this invention has a reasonable structural design, small space occupation, strong load-bearing capacity, high construction efficiency, high automatic inspection efficiency and high inspection reliability.

[0022] 2) The integrated maintenance system for LPG ship cargo tanks of the present invention is equipped with inspection support and inspection components. The inspection support is set on the cargo tank maintenance channel and surrounds the cargo tank. The inspection components can automatically and periodically inspect various electrical components and sensors around the cargo tank on the inspection support according to a predetermined program, which significantly improves the efficiency and reliability of daily inspection.

[0023] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0024] Figure 1 This is a longitudinal sectional front view of the integrated maintenance system for LPG ship cargo tanks of the present invention after it has been installed on an LPG ship.

[0025] Figure 2 This is a top view of the integrated maintenance system for LPG ship cargo tanks of the present invention after it has been installed on an LPG ship;

[0026] Figure 3 This is a three-dimensional structural diagram of the integrated maintenance system for LPG ship cargo tanks of the present invention installed on the outer wall of the cargo tank;

[0027] Figure 4 This is a top view of the automatic inspection component in the integrated maintenance system for LPG ship cargo tanks of the present invention.

[0028] Figure 5 This is a three-dimensional structural diagram of the left side of the automatic inspection component in the integrated maintenance system for LPG ship cargo tanks of the present invention.

[0029] Figure 6 This is a three-dimensional structural diagram of the automatic inspection component in the integrated maintenance system for LPG ship cargo tanks of the present invention.

[0030] Figure 7 This is a bottom-view three-dimensional structural diagram of the automatic inspection component in the integrated maintenance system for LPG ship cargo tanks of the present invention.

[0031] Figure 8 This invention relates to an integrated maintenance system for LPG ship cargo tanks. Figure 7 A magnified view of part B in the image;

[0032] Figure 9 This invention relates to an integrated maintenance system for LPG ship cargo tanks. Figure 4 Schematic diagram of the three-dimensional structure in the AA direction.

[0033] Among them: 1-LPG vessel, 2-upper deck maintenance passage, 3-middle deck maintenance passage, 4-lower deck maintenance passage, 5-cargo tank, 6-straight ladder passage, 7-structural platform, 9-grating, 10-guardrail, 11-handrail, 12-marine chain, 13-support connecting rod, 14-inspection support rail, 15-inspection sliding support plate, 17-first gear, 18-pulley, 19-sliding buckle plate, 20-motor, 21-second gear, 22-power battery, 23-linear actuator, 24-first telescopic tube, 25-second telescopic tube, 26-third telescopic tube, 27-mounting base, 28-inspection camera. Detailed Implementation

[0034] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and by way of embodiments. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0035] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0036] according to Figures 1-9 As shown, an integrated maintenance system for LPG ship cargo tanks includes a cargo tank maintenance access component and an automatic inspection component. The cargo tank maintenance access component is installed on the LPG ship 1, and the automatic inspection component is installed on the cargo tank maintenance access component. The cargo tank maintenance access system includes an upper maintenance access 2, a middle maintenance access 3, and a lower maintenance access 4. The upper maintenance access 2 surrounds the cargo tank 5 of the LPG vessel and is used for routine maintenance of the various electrical components and sensors located above the vessel. The middle maintenance access 3 surrounds the cargo tank 5 of the LPG vessel and is located below the upper maintenance access 2. It is used for routine maintenance of the various electrical components and sensors located at the mid-height level of the vessel. A first vertical ladder is provided between the middle maintenance access 3 and the upper maintenance access 2 for personnel access. The lower maintenance access 4 is located on the cargo tank 5 of the LPG vessel and is located below the middle maintenance access 3. It is used for routine maintenance of the various electrical components and sensors located below the vessel. A second vertical ladder is provided between the lower maintenance access 4 and the middle maintenance access 3 for personnel access.

[0037] Furthermore, a third straight ladder passage is provided on the top of the cargo hold above the upper maintenance passage 2, connected to a watertight hatch that allows free access, facilitating crew access from the deck via the watertight hatch.

[0038] It should be noted that, since the cargo tank 5 of the LPG vessel has a spherical structure at both ends, there is sufficient free space in the fore and aft bulkheads. Therefore, straight ladder passages 6 are arranged on the fore and aft bulkheads of the cargo hold to connect the upper maintenance passage 2, the middle maintenance passage 3, and the lower maintenance passage 4. Considering maintenance equipment, lighting, and crew safety, the total cargo hold height of 13000 mm is divided into three layers: the lower maintenance passage 4 is located 1100 mm from the baseline, the middle maintenance passage 3 is located 7200 mm from the baseline, and the lower maintenance passage 4 is located 9800 mm from the baseline. Each layer of maintenance passages is arranged in a ring around the tank. Each layer of passages can be interconnected by straight ladders on the fore and aft bulkheads. Specifically, due to insufficient space at the stern of the cargo tank 5 at a height of 7200 mm from the baseline, the middle maintenance passage 3 is divided into left and right ends, with a straight ladder at each end connecting the upper and lower passages, and the middle is disconnected to ensure a clear passage space of 800 mm. The channel at the bottom of the LPG cargo tank 5 is achieved by using the 800X600MM channel hole of the double-bottom structure of the cargo hold to achieve front-to-back and left-to-right symmetry.

[0039] It should also be noted that the cargo tank 5 of the LPG vessel has spherical heads at both ends and a cylindrical shape in the middle, and the entire cargo tank 5 is arranged inside the cargo hold. Based on the finite element stress analysis and optimal calculation of material mechanical properties by the design institute, C-shaped elastic saddle structures are set at approximately 1 / 4 and 3 / 4 of the total length of the tank to support the weight of the tank and the liquid cargo.

[0040] The upper maintenance passage 2 includes a structural platform 7, triangular ribs, a grating 9, and a guardrail 10. The structural platform 7 is arranged circumferentially around the outer wall of the cargo tank 5. The triangular ribs are supported on the structural platform 7 and the cargo tank 5 to improve the structural strength of the structural platform 7. The guardrail 10 is arranged on the outer side of the structural platform 7, and the grating 9 is arranged on the structural platform 7 for crew members to walk on.

[0041] The structural platform 7 is welded into a T-shaped structure from L63X63X6 angle steel, and the structural platform 7 is horizontally welded to the outer wall of the cargo tank 5; furthermore, the two ends of the longitudinal angle steel are welded between the two T-shaped structures; the transverse angle steel is welded to the back of the structural plate, which can save the angle steel support material, not only ensuring the strength of the platform but also saving a lot of angle steel material and welding and grinding work.

[0042] One side of the triangular rib is welded to the outer wall of the cargo hold, and the other side is welded to the bottom surface of the structural platform 7 to improve the load-bearing capacity of the structural platform 7. The triangular rib is a 300X800, t=8MM triangular elbow plate. The grating 9 is a GRP fiberglass grating, and multiple gratings 9 are tightly fitted and laid on the structural platform 7 to ensure the comfort of walking through the passage. The guardrail 10 is not less than 1000mm high. Furthermore, temperature sensors and lighting for the cargo hold are arranged above the upper maintenance passage 2 (to ensure that the entire area around the cargo tank 5 is well-lit), facilitating daily maintenance of various electrical components or sensors by the crew. To facilitate on-site installation of the GRP fiberglass grating 9, J-type and double J-type stainless steel 304 clamps are used for fixing, eliminating the need for bolt holes and making disassembly and assembly simple and easy, saving a lot of time and effort for on-site construction.

[0043] The middle-level maintenance channel 3 has the same structure as the upper-level maintenance channel 2. The middle-level maintenance channel 3 is located below the upper-level maintenance channel 2 and is horizontally arranged around the perimeter of the cargo tank 5. It is used for maintenance of electrical equipment or sensors located at the middle level of the cargo tank 5. The lower-level maintenance channel 4 has the same structure as the upper-level maintenance channel 2. The lower-level maintenance channel 4 is located below the middle-level maintenance channel 3 and is horizontally arranged around the perimeter of the cargo tank 5. It is used for maintenance of electrical equipment or sensors located at the bottom of the cargo tank 5.

[0044] Furthermore, a straight ladder passage 6 (400mm wide * 1126mm long) leading down to the double bottom is installed every 6 * 800 = 4800mm. The upper end of the straight ladder passage 6 is welded to a platform, and the lower end is welded to the structural flat steel. Handrails 11 and marine chains 12 are added to the straight ladder passage 6 (to facilitate safe access to the double bottom of the cargo hold). With the help of the structural holes (800 x 600mm) in the double bottom, maintenance passages are reasonably arranged. They are arranged in all directions along the structural holes and can be directly accessed from the platform on the bottom floor by a straight ladder. This eliminates the need for additional angle steel or platforms, saving all materials and welding work.

[0045] It should be noted that, due to the independence of each maintenance passage, the installation of the passage platform and railings was completed in sections on-site simultaneously with the structure. Sufficient space was left at the joints of the platform railings to allow for welding and installation after alignment during the final assembly stage. This significantly shortened the hoisting and installation cycle and ensured the integrity of the paint throughout the entire compartment. To ensure the safety of the vertical ladders, two layers of marine chain 12 were installed at the entrances to prevent personnel from falling. A ring of maintenance platforms was arranged approximately 7200mm above the C-shaped saddle, avoiding the saddle itself. Since the stern end is the structural platform 7, no separate platform was needed; only railings were required. Continuous platforms could be arranged on the forward, left, and right sides. Because the front end was closer to the ball joint, the middle platform was omitted, dividing it into left and right sections. The angle steel platforms were directly placed on the triangular elbow plates, which were spaced 800mm apart according to the structural position of the bulkhead. The platform is against the bulkhead on one side and the tank on the other. To ensure the safety of the crew, railings have been installed on the side against the tank.

[0046] Considering the 5800mm distance between the 13000mm and 7200mm platforms at the top of the hold, a transition platform was installed at 9800mm from the baseline (aligned with the main deck height) to ensure both safety and comfort of the access ladders. The length of this platform is exactly the same as the length of the 7200mm gap below, and a railing is installed on the side closest to cargo tank 5, with ladders leading directly to the lower platform at both ends.

[0047] The automatic inspection component includes an inspection support and an inspection component. The inspection support is mounted on the maintenance passage of the cargo tank 5, and the inspection component is mounted on the inspection support. The inspection support includes a support connecting rod 13 and an inspection support slide rail 14. The support connecting rod 13 is in the shape of a bent rod, with one end horizontally mounted on the guardrail 10 or the structural platform 7, and the support connecting rod 13 located outside the guardrail 10 and the structural platform 7. Multiple support connecting rods 13 are evenly distributed along the upper maintenance passage 2 at predetermined intervals to provide support for the inspection support slide rail 14. The inspection support slide rail 14 is generally plate-shaped and is mounted along the upper maintenance passage 2 on the other end of the multiple support connecting rods 13 to provide support for the inspection component. Alternatively, the inspection support slide rail 14 is bent into an arc shape at the straight elevator passage 6 to facilitate personnel transition between the maintenance passage and the straight elevator. Furthermore, the inner wall of the inspection support slide rail 14 is provided with gear teeth.

[0048] The inspection component includes an automatic inspection sliding power component and an automatic inspection camera component. The automatic inspection sliding power component is mounted on the inspection support component, and the automatic inspection camera component is mounted on the automatic inspection sliding power component. The automatic inspection sliding power component includes an inspection sliding seat and a sliding inspection power component. The inspection sliding seat is mounted on the inspection support slide rail 14, and the sliding inspection power component is mounted on the inspection sliding seat.

[0049] The inspection sliding seat includes an inspection sliding support plate 15, a support shaft, a first gear 17, a pulley 18, and a sliding buckle plate 19. The inspection sliding support plate 15 is rectangular and slidably mounted on the inspection support slide rail 14. One end of the support shaft is vertically fixed to the bottom surface of the inspection sliding support plate 15, and two support shafts are symmetrically arranged on the inspection sliding support plates 15 on both sides of the inspection support slide rail 14. The first gear 17 is rotatably mounted on one of the support shafts and meshes with the gear teeth. The pulley 18 is rotatably mounted on the other support shaft, and the sidewall of the pulley 18 is rollingly connected to the outer sidewall of the inspection support slide rail 14. One end of the sliding buckle plate 19 is horizontally fixed to the other end of the support shaft, and the other end of the sliding buckle plate 19 extends to the bottom surface of the inspection support slide rail 14 to prevent the inspection sliding support plate 15 from tipping off the inspection support slide rail 14. The two sliding buckles 19 correspond one-to-one with the two support shafts. Furthermore, three inspection sliding seats are provided, and after the three inspection sliding seats are hinged end to end, they are all slidably mounted on the inspection support slide rail 14.

[0050] The sliding inspection power unit includes a motor 20, a second gear 21, and a power battery 22. The motor 20 is fixedly mounted on one of the inspection sliding seats at one end, and the shaft of the motor 20 rotates through the inspection sliding support plate 15. The second gear 21 is fixedly mounted on the shaft of the motor 20 and meshes with the gear teeth. The power battery 22 is fixedly mounted on one of the inspection sliding seats at the other end and is electrically connected to the motor 20. The motor 20 is periodically started according to the controller command to drive the inspection sliding seat to slide on the inspection support slide rail 14, thereby driving the automatic inspection camera to automatically and periodically inspect the various electrical or sensor components around the cargo tank 5, improving inspection efficiency and reliability, reducing crew workload, and thus reducing the overall crew size and shipping costs.

[0051] The automatic inspection camera system includes an inspection support transmission component and an inspection camera 28. The inspection support transmission component is mounted on the inspection sliding seat, and the inspection camera 28 is mounted on the inspection support transmission component. The inspection support transmission component includes an inspection support telescopic tube and a linear actuator 23, both of which are mounted on the inspection sliding support plate 15.

[0052] The inspection support telescopic tube includes a first telescopic tube 24, a second telescopic tube 25, and a third telescopic tube 26. The bottom end of the first telescopic tube 24 is fixedly mounted on an inspection sliding seat located in the middle. The bottom end of the second telescopic tube 25 is axially slidably embedded in the top end of the first telescopic tube 24, and the second telescopic tube 25 cannot slide out from the top end of the first telescopic tube 24. The bottom end of the third telescopic tube 26 is axially slidably embedded in the top end of the second telescopic tube 25, and the third telescopic tube 26 cannot slide out from the top end of the second telescopic tube 25. The linear actuator 23 is fixedly mounted on the inspection sliding support plate 15 inside the first telescopic tube 24. The inspection camera 28 is fixedly mounted on the top end of the third telescopic tube 26 via a mounting base 27, and the inspection camera 28 is connected to the top end of the linear actuator 23 via the mounting base 27. Furthermore, the inspection camera 28 has a built-in pan-tilt unit to meet the requirement of free rotation for inspection. The linear actuator 23 is a mechanical device that converts energy such as electrical energy, pneumatic energy, or hydraulic energy into linear motion.

[0053] The automatic inspection components are provided in three sets, which are respectively installed on the upper maintenance channel 2, the middle maintenance channel 3 and the lower maintenance channel 4 to meet the automatic inspection needs of the upper maintenance channel 2, the middle maintenance channel 3 and the lower maintenance channel 4.

[0054] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An integrated maintenance system for LPG ship cargo tanks, characterized in that, include: A cargo tank maintenance access system is installed on an LPG vessel. The cargo tank maintenance access system includes an upper maintenance access, a middle maintenance access, and a lower maintenance access. The upper maintenance access surrounds the cargo tank of the LPG vessel; the middle maintenance access surrounds the cargo tank; and the lower maintenance access surrounds the cargo tank. The automatic inspection component includes an inspection support and an inspection component. The inspection support is installed on the maintenance passage of the cargo tank, and the inspection component is on the inspection support to automatically inspect each electrical component and sensor on the upper maintenance passage, the middle maintenance passage, and the lower maintenance passage.

2. The integrated maintenance system for LPG ship cargo tanks according to claim 1, characterized in that, The upper maintenance access includes a structural platform, triangular ribs, a grating, and guardrails. The structural platform is arranged around the outer wall of the cargo tank. The triangular ribs are supported on the structural platform and the cargo tank to improve the structural strength of the structural platform. The guardrails are arranged on the outer side of the structural platform, and the gratings are arranged on the structural platform for crew members to walk on.

3. The integrated maintenance system for LPG ship cargo tanks according to claim 1 or 2, characterized in that, The middle-level maintenance channel has the same structure as the upper-level maintenance channel, and is located below the upper-level maintenance channel, horizontally arranged around the perimeter of the cargo tank; the lower-level maintenance channel has the same structure as the upper-level maintenance channel, and is located below the middle-level maintenance channel, horizontally arranged around the perimeter of the cargo tank.

4. The integrated maintenance system for LPG ship cargo tanks according to claim 1 or 2, characterized in that, The inspection support includes a support connecting rod and an inspection support slide rail. One end of the support connecting rod is disposed on the guardrail or the structural platform, and the support connecting rod is located outside the guardrail and the structural platform. The inspection support slide rail is disposed along the upper maintenance channel on the other end of the multiple support connecting rods to provide sliding support for the inspection component.

5. The integrated maintenance system for LPG ship cargo tanks according to claim 1 or 2, characterized in that, The inspection component includes an automatic inspection sliding power component and an automatic inspection camera component. The automatic inspection sliding power component is slidably mounted on the inspection support component, and the automatic inspection camera component is mounted on the automatic inspection sliding power component to automatically inspect various electrical components and sensors.

6. The integrated maintenance system for LPG ship cargo tanks according to claim 5, characterized in that, The automatic inspection sliding power component includes an inspection sliding seat and a sliding inspection power component. The inspection sliding seat is slidably mounted on the inspection support slide rail, and the sliding inspection power component provides sliding power on the inspection sliding seat.

7. The integrated maintenance system for LPG ship cargo tanks according to claim 6, characterized in that, The inspection sliding seat includes an inspection sliding support plate, a support shaft, a first gear, a pulley, and a sliding buckle plate. The inspection sliding support plate is slidably mounted on the inspection support slide rail. One end of the support shaft is mounted on the bottom surface of the inspection sliding support plate, and two support shafts are symmetrically arranged on the inspection sliding support plates on both sides of the inspection support slide rail. The first gear is rotatably mounted on one of the support shafts, and the first gear meshes with the gear teeth on the inner sidewall of the inspection support slide rail. The pulley is rotatably mounted on the other support shaft, and the pulley sidewall is rollingly connected to the outer sidewall of the inspection support slide rail. One end of the sliding buckle plate is mounted on the other end of the support shaft, and the other end of the sliding buckle plate extends to the bottom surface of the inspection support slide rail. The two sliding buckles correspond one-to-one with the two support shafts. After the multiple inspection sliding seats are hinged end to end, they are all slidably mounted on the inspection support slide rail.

8. The integrated maintenance system for LPG ship cargo tanks according to claim 7, characterized in that, The sliding inspection power component includes a motor, a second gear, and a power battery. The motor is mounted on one of the inspection sliding seats at one end, and the motor shaft rotates through the inspection sliding support plate. The second gear is mounted on the motor shaft and meshes with the gear teeth. The power battery is mounted on one of the inspection sliding seats at the other end and is electrically connected to the motor.

9. The integrated maintenance system for LPG ship cargo tanks according to claim 6, characterized in that, The automatic inspection camera device includes an inspection support transmission component and an inspection camera. The inspection support transmission component moves along the inspection sliding seat, and the inspection camera is mounted on the inspection support transmission component to automatically inspect various electrical components and sensors.

10. The integrated maintenance system for LPG ship cargo tanks according to claim 6, characterized in that, The inspection support transmission component includes an inspection support telescopic tube and a linear actuator, both of which are mounted on the inspection sliding support plate. The inspection camera is mounted on the inspection support telescopic tube and connected to the linear actuator to adjust the height of the inspection camera and improve inspection efficiency.

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