Compact self-elevating offshore launching platform of liquid carrier rocket and use method of compact self-elevating offshore launching platform

Abstract

The invention provides a compact self-elevating offshore launching platform for a liquid carrier rocket and a using method of the compact self-elevating offshore launching platform. The compact self-elevating offshore launching platform comprises a supporting system, a rocket storage system, a propellant filling system and a launching system. The supporting system comprises a main ship body and supporting legs; the bottom ends of the supporting legs abut against the seabed and drive the main ship body to ascend. The rocket storage system is arranged on one side above the main hull; the two opposite end faces and the top face of the rocket storage system can be opened and closed, and a rocket is contained in the rocket storage system in the horizontal direction. The launching system is arranged on the side, away from the rocket storage system, above the main hull, the launching system clamps the tail of the rocket and rotates the rocket to be vertical, and the sea surface is located below the tail of the rocket; storage tanks of the propellant filling system are horizontally staggered and vertically separated from the two sides of the main ship body. The device has the advantages that the launching stability and the launching efficiency are improved, the tail flame treatment capacity is overcome, and the future high-frequency and motorized liquid rocket marine launching requirement is met.

Description

Technical Field

[0001] This invention belongs to the field of launch support technology for carrier rockets, specifically relating to a compact self-elevating sea-based launch platform for liquid-fueled carrier rockets and its usage method. Background Technology

[0002] With the continuous increase in the number of space launch missions, the limitations of traditional land-based space launch centers in terms of geographical location, weather conditions, and launch windows are becoming increasingly apparent. Sea-based launches, however, can effectively overcome these limitations by allowing for the free selection of suitable launch sites and landing zones through sea navigation. Furthermore, sea-based launches can choose to launch rockets from low-latitude regions near the equator, utilizing the Earth's rotation to further enhance rocket payload capacity. Therefore, sea-based launches are of great significance for rocket launches and have important development prospects. Countries around the world are gradually exploring the use of sea platforms for rocket launches. For example, the "Sea Launch" project, a collaboration between Russia and Ukraine, uses the semi-submersible platform "Odyssey" to launch from sea areas near the equator, offering advantages such as high launch efficiency and strong orbital adaptability. However, such platforms are large, have high construction and maintenance costs, and still experience certain roll and pitch problems in wave conditions, affecting launch stability.

[0003] Patent document KR20250033857A discloses a scheme for a marine launch platform. The platform has multiple nozzles on its sides and bottom. The reverse thrust generated by the seawater ejected from the nozzles can continuously adjust the state of the launch platform, thereby maintaining the stability of the launch platform and providing a better marine launch environment for the rocket. Patent CN115325884A discloses a self-elevating marine launch platform and its mobile marine rocket launch method. The launch platform has four legs with a lifting platform in between. By fixing the legs to the seabed, a stable environment can be provided for marine launch and rocket body transportation and assembly.

[0004] However, the overall performance of patent document KR20250033857A is still relatively weak. The "vertical assembly + vertical transport" mode not only increases space occupation and transport risks, but also leads to low operational efficiency due to the cumbersome process. It is even more difficult to maintain stability during assembly and launch in harsh sea conditions, directly affecting rocket launch operations. In addition, the platform lacks a superior exhaust plume handling function and does not have the capability for multiple consecutive high-efficiency launches.

[0005] To enhance launch stability and efficiency, overcome exhaust plume handling limitations, and meet the future demands for high-frequency, mobile liquid rocket sea launches, this invention designs a compact, self-elevating sea launch platform for liquid-propellant rockets and its operational method, thus solving the aforementioned problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a compact self-elevating sea-based launch platform for liquid-fueled rockets and its method of use.

[0007] According to the present invention, a compact self-elevating sea launch platform for a liquid-propellant launch vehicle includes: a support system, a rocket storage system, a propellant loading system, and a launch system; The support system includes: the main hull and support legs; the support legs are connected to the main hull in a lifting manner, and the bottom end of the support legs abuts against the seabed and drives the main hull to rise; the rocket storage system is located on one side above the main hull; the two opposite end faces and the top face of the rocket storage system can be opened and closed, and the rocket is housed in the rocket storage system in a horizontal direction. The launch system is located on the side above the main hull, away from the rocket storage system. The launch system clamps the tail of the rocket and rotates the rocket to a vertical position. The sea surface is below the tail of the rocket. The propellant loading system's tanks are horizontally offset and vertically separated on both sides of the main hull.

[0008] Preferably, the main hull is vertically arranged in at least two layers, with the lowest layer floating on the water surface; the support legs are vertically arranged, with at least three support legs being raised and lowered to connect to the main hull, and the lowered bottom of the support legs abutting against the seabed.

[0009] Preferably, the rocket storage system includes: a first gate, a retractable roof, a warehouse wall, and a second gate; the warehouse wall is spaced apart, extending along the direction of the main hull and fixed to the top of the main hull; The two ends of the warehouse enclosure are connected by a first gate near the stern and a second gate near the bow, respectively. The first and second gates can be opened and closed horizontally. A telescopic roof is slidably connected to the upper part of the warehouse enclosure and slides and retracts towards the bow. The first gate, the telescopic roof, the warehouse enclosure, and the second gate constitute the rocket warehouse.

[0010] Preferably, the propellant loading system includes: a first propellant tank, a second propellant tank, and a command ship control system; the first and second propellant tanks are arranged on different layers of the main hull, and are located on opposite sides of each other, with the first and second propellant tanks storing the rocket's oxidizer and reducing agent respectively; the command ship control system is a command ship moored at a safe distance.

[0011] Preferably, the launch system includes: an erection hydraulic pit, an erection hydraulic device, a launch pad, a restraint release device, and a deck diagonal support; The launch pad is located at the top of the main hull near the stern; the upper main hull extends horizontally, and the launch pad is vertically offset from the lower main hull; a deck diagonal brace is installed between the extended end of the upper main hull and the end of the lower main hull. A hydraulic erection pit is provided between the launch pad and the first gate; the hydraulic erection device is housed in the hydraulic erection pit; the tail of the horizontal launch vehicle is connected to and erected by the hydraulic erection device; the restraint and release device is located above the launch pad and is used to fix the vertical launch vehicle.

[0012] According to the present invention, a method for using a compact self-elevating sea-based launch platform for a liquid-propellant launch vehicle is provided, comprising the following steps: Step S1: The launch platform is driven to the dock, and the upper main hull of the launch platform is connected to the dock by a pier. Then, the rocket in a horizontal position is transported from the land to the launch platform by a transport vehicle along the pier. Step S2: Open the gate of the rocket storage room near the bow of the ship, and the transport vehicle carries the rockets into the rocket storage room. After all the rockets are in the rocket storage room, close the storage room gate. Step S3: The launch platform proceeds to the designated launch area, during which time the rocket storage area remains closed; Step S4: After the launch platform arrives at the designated sea area, its support legs are fixed to the seabed and the main hull is raised to a certain height to maintain stability; Step S5: Open the door of the rocket storage room near the stern of the ship, and the transport vehicle carrying the rocket drives to the launch pad at the stern of the ship; Step S6: The retractable roof of the rocket storage room retracts and opens to ensure sufficient space above the rocket during erection; the rocket is erected using the erection hydraulic device located in the erection hydraulic pit at the rear of the launch platform. After erection, the tail of the rocket is docked with the launch pad, and the rocket storage room door and roof are closed. Step S7: The propellant loading system loads the rocket into the erected position; Step S8: After fueling is completed, ignition is performed and the rocket is launched.

[0013] Preferably, in step S1: The main hull adjusts the ballast water level to adjust the height between the main hull deck and the dock platform, and the propulsion system adjusts the distance between the main hull deck and the dock.

[0014] Preferably, in step S5: The transport vehicle operates using magnetic strip navigation and positioning, with the rocket's axis aligned with the launch pad's axis.

[0015] Preferably, in step S7: Remote, unattended refueling of propellants is carried out by a command ship docked at a safe distance.

[0016] Preferably, in step S8: Remote telemetry and ignition control are conducted from a command ship positioned at a safe distance.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. Excellent stability and strong resistance to sea conditions: Adopting a self-elevating structure, the support legs can be lowered to touch the seabed and the main hull can be raised to lift off the sea surface, completely eliminating the direct impact of waves on the platform. It can maintain a stable attitude even in severe sea conditions, greatly reducing the restrictions of severe sea conditions on rocket launch operations.

[0018] 2. Compact structure, excellent economy and maneuverability: The main hull adopts a vertical multi-layered layout, the propellant tanks are horizontally staggered and vertically separated on both sides of the hull, and the rocket is horizontally housed, which greatly reduces the redundant layout space on the deck; the overall hull volume is smaller and the cost is lower, while improving the convenience of movement and berthing.

[0019] 3. Simplified thermal protection design and reduced costs: The launch system is located at the stern and the rocket tail is directly below the sea surface. The high-temperature gas generated by the rocket ignition can be directly discharged into the sea without the need for traditional large diversion channels or complex exhaust systems, which reduces the design difficulty and the thermal protection requirements of the hull and significantly controls costs.

[0020] 4. Efficient launch process and improved safety: Horizontal assembly, testing and transportation are adopted to replace the traditional "vertical assembly + vertical transportation"; storage and transportation in a horizontal state occupy less space and have higher stability, reducing transportation risks, simplifying the preparation process and greatly improving launch efficiency. Attached Figure Description

[0021] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall layout of the compact self-elevating sea launch platform for the liquid-fueled launch vehicle of the present invention.

[0022] Figure 2 This is a flowchart of the method of using the compact self-elevating sea launch platform for liquid-fueled rockets according to the present invention.

[0023] Figure 3 This is a schematic diagram of the support system of the present invention.

[0024] Figure 4 Figures a and b are schematic diagrams of two opening methods of the rocket storage system of the present invention.

[0025] Figure 5 This is a schematic diagram of the living area of ​​the equipment of the present invention.

[0026] Figure 6 This is a schematic diagram of the propellant loading system of the present invention.

[0027] Figure 7 This is a schematic diagram of the launching system of the present invention.

[0028] The diagram shows: 1. Support system; 11. Support leg; 12. Main hull; 2. Rocket storage system; 21. First gate; 22. Retractable roof; 23. Warehouse perimeter wall; 24. Second gate; 4. Propellant loading system; 41. First propellant tank; 42. Second propellant tank; 5. Launch system; 51. Horizontal launch vehicle; 52. Erection hydraulic pit; 53. Erection hydraulic device; 54. Vertical rocket; 55. Launch pad; 56. Traction release device; 57. Deck diagonal bracing. Detailed Implementation

[0029] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0030] like Figure 1 As shown, a compact self-elevating sea launch platform for liquid-fueled launch vehicles includes: a support system 1, a rocket storage system 2, a propellant loading system 4, and a launch system 5.

[0031] Support system 1 includes a main hull 12 and support legs 11. Support legs 11 are elliptically connected to the main hull 12, with their bottom ends resting on the seabed and driving the main hull 12 upwards. Rocket storage system 2 is located on one side above the main hull 12. The two opposite end faces and the top face of rocket storage system 2 are openable and closable, and rockets are horizontally housed within rocket storage system 2.

[0032] Launch system 5 is located on the side above the main hull 12, away from rocket storage system 2. Launch system 5 clamps the tail of the rocket and rotates the rocket to a vertical position, with the sea surface below the tail of the rocket. The propellant loading system 4 has horizontally offset tanks, vertically separated on both sides of the main hull 12.

[0033] The working principle of this application is as follows: After the main hull 12, carrying the support legs 11, floats to the target sea area, the support legs 11 descend to touch the seabed and lift the main hull 12 off the sea surface, ensuring stable operation. The rocket is stored horizontally in an openable and closable storage room to maintain a suitable environment. During transfer, the corresponding door of the storage room opens and the roof retracts, and the rocket is moved to the launch system by a transport vehicle. The launch system 5 uses a hydraulic device to clamp and rotate the tail of the rocket to a vertical position, with the tail facing the sea surface, eliminating the need for a guide channel. Horizontally staggered and vertically separated storage tanks store oxidizer and reducing agent respectively. Refueling is completed remotely, and finally, the launch is remotely controlled by a command ship. The compact layout improves efficiency and safety.

[0034] Specifically, the main hull 12 has at least two vertical layers, with the lowest layer floating on the water surface. Support legs 11 are vertically arranged, with at least three legs 11 connected to the main hull 12 in a lifting and lowering manner. The lowered ends of the support legs 11 rest against the seabed, ensuring stable support and reliable automatic lifting and lowering of the entire launch platform. The main hull 12 can withstand the load-bearing, vibration, and impact conditions required for transporting, launching, and refueling liquid-fueled rockets, and its type is unrestricted; it can be self-propelled or non-self-propelled.

[0035] In one embodiment, the main hull 12 consists of an upper deck and a lower deck, with four support legs connecting the four corners of the upper and lower decks. When the launch platform reaches the target sea area, the four support legs 11 can be inserted into the seabed, raising the entire launch platform to a certain height above the sea surface, thereby maintaining a stable state during operation.

[0036] In one embodiment, the main hull 12 is provided with a ballast water system and a propulsion system. The ballast water system adjusts the draft of the lower main hull 12, and the propulsion system moves the launch platform.

[0037] The rocket storage system 2 includes: a first gate 21, a retractable canopy 22, storage enclosure walls 23, and a second gate 24. The storage enclosure walls 23 are spaced apart, extending along the main hull 12 and fixed to the top layer of the main hull 12. The two ends of the storage enclosure walls 23 are connected by the first gate 21 near the stern and the second gate 24 near the bow, respectively. The first gate 21 and the second gate 24 can be opened and closed horizontally. The retractable canopy 22 is slidably connected to the upper end of the storage enclosure walls 23 and retracts towards the bow. The first gate 21, the retractable canopy 22, the storage enclosure walls 23, and the second gate 24 constitute the rocket storage room.

[0038] During rocket transport, the rocket is stored in a closed rocket storage facility, maintaining stable and suitable temperature, humidity, and pressure. Once the launch platform reaches the target area and stabilizes, the first door 21 is opened, the retractable roof 22 is retracted, and the rocket is transported to the stern launch system 5 by a transport vehicle. At this point, because the retractable roof 22 of the rocket storage facility is retracted and the first door 21 is open, as... Figure 4 As shown, the rocket does not need to be completely transported out of the factory and there is enough space to complete the erection, which greatly reduces the size of the launch platform and makes the overall layout more compact.

[0039] The main hull 12 is equipped with an equipment and living area 3, which includes an equipment building 32, a work building 31, and a deck activity area 33. The equipment building 32 and work building 31 each have four stories and are located on either side outside the rocket hangar. The deck activity area 33 is located on the lower level of the main hull 12. These areas can accommodate the necessary rocket launch equipment and provide essential living quarters for rocket launch personnel.

[0040] The propellant loading system 4 includes a first propellant tank 41, a second propellant tank 42, and a command ship control system. The first propellant tank 41 and the second propellant tank 42 are located on different levels of the main hull 12, and are situated on opposite sides. The first propellant tank 41 and the second propellant tank 42 respectively store the oxidizer and reductant required for the rocket engine. The thick steel plates of the main hull 12 greatly reduce the risk of direct contact and explosion, ensuring the safety of the launch mission. The command ship control system is a remote, unattended propellant loading system operated from a command ship moored at a safe distance.

[0041] For rockets that commonly use liquid oxygen / kerosene as propellants, liquid oxygen can be stored in the first propellant tank 41, and kerosene in the second propellant tank 42. Separating the liquid oxygen and kerosene tanks effectively prevents liquid oxygen from causing kerosene to wax or clogging pipelines, reducing the risk of explosions due to leaks or contact. It also facilitates refueling and safety isolation, improving system reliability and operational safety. Using this propellant refueling system to refuel rockets in the erected state can shorten the sea-based refueling process and improve launch efficiency.

[0042] The launch system 5 includes: an erection hydraulic pit 52, an erection hydraulic device 53, a launch pad 55, a restraint and release device 56, and a deck diagonal support 57. The launch pad 55 is located at the upper main hull 12 near the stern. The upper main hull 12 extends horizontally, and the launch pad 55 is vertically offset from the lower main hull 12, thus eliminating the need for a flow guide. A deck diagonal support 57 is installed between the extended end of the upper main hull 12 and the end of the lower main hull 12 to strengthen the upper main hull 12, ensure the stability of the launch pad 55, and meet the requirements for liquid-fueled rocket support and launch tail flame impact.

[0043] A hydraulic erection pit 52 is provided between launch pad 55 and the first gate 21. An erection hydraulic device 53 is housed in the erection hydraulic pit 52, providing sufficient space to ensure the overall erection and retraction of the entire 100-ton-class structure, including the rocket. The tail of the horizontally positioned launch vehicle 51 is connected to the erection hydraulic device 53, allowing it to be erected into a vertically positioned rocket 54. A restraint release device 56 is located above launch pad 55, securing the vertically positioned rocket 54 to the launch pad 55. The propellant loading system 4 is connected to launch pad 55 and loads the vertically positioned rocket 54, with remote monitoring and ignition control via a command ship positioned at a safe distance.

[0044] This embodiment also provides a method for using a compact self-elevating sea-based launch platform for liquid-fueled launch vehicles, the steps of which include: Step S1: The launch platform is driven to the dock and a pier is used to connect the upper main hull 12 of the launch platform to the dock. Then, a transport vehicle is used to transport the rocket, which is in a horizontal position, from the land to the launch platform along the pier.

[0045] Preferably, the height of the main hull 12 deck and the dock platform can be adjusted by adjusting the ballast water, and the distance between the main hull deck and the dock can be adjusted by the propulsion system.

[0046] Step S2: Open the gate of the rocket storage room near the bow of the ship, and the transport vehicle carrying the rockets into the rocket storage room. After all the rockets are in the rocket storage room, close the storage room gate.

[0047] Step S3: The launch platform sails to the designated launch area, during which time the rocket storage area remains closed.

[0048] Step S4: After the launch platform arrives at the designated sea area, its support legs 11 are fixed to the seabed and the main hull 12 is raised to a certain height to maintain stability.

[0049] Step S5: Open the gate of the rocket storage room near the stern of the ship, and the transport vehicle carrying the rocket drives to launch pad 55 at the stern.

[0050] Preferably, the transport vehicle operates using magnetic strip navigation and positioning to ensure that the rocket axis is aligned with the launch pad 55 axis, so as to smoothly dock with the erection hydraulic device 53 and the launch pad 55.

[0051] Step S6: The retractable roof of the rocket storage room retracts and opens to ensure sufficient space above the rocket during erection. The rocket is erected using the erection hydraulic device 53 located in the erection hydraulic pit 52 at the rear of the launch platform. After erection, the tail of the rocket is docked with the launch pad 55, and the rocket storage room door and roof are closed.

[0052] Step S7: Propellant loading system 4 loads propellant onto the rocket in the upright position.

[0053] Preferably, remote, unattended propellant refueling is carried out by a command ship docked at a safe distance.

[0054] Step S8: Ignite the rocket as soon as possible after fueling is complete to ensure a rapid launch.

[0055] Preferably, remote telemetry and ignition control are carried out by a command ship moored at a safe distance.

[0056] The rocket sea launch platform and its usage method provided by this invention are applicable to liquid-fueled launch vehicles in the "three-horizontal mode" (i.e., horizontal assembly, horizontal testing and horizontal transportation), and have the characteristics of stable launch foundation, simple launch device (no need for guide trough), compact spatial layout and high launch efficiency.

[0057] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, 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 this application.

[0058] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A compact self-elevating sea-based launch platform for liquid-fueled rockets, characterized in that, include: Support system (1), rocket storage system (2), propellant loading system (4) and launch system (5); The support system (1) includes the main hull (12) and the support legs (11); the support legs (11) are connected to the main hull (12) in a lifting manner, and the bottom end of the support legs (11) abuts against the seabed and drives the main hull (12) to rise; the rocket storage system (2) is located on one side above the main hull (12); the two opposite end faces and the top face of the rocket storage system (2) can be opened and closed, and the rocket is housed in the rocket storage system (2) in a horizontal direction. The launch system (5) is located on the side above the main hull (12) away from the rocket storage system (2). The launch system (5) clamps the tail of the rocket and rotates the rocket to a vertical position. The sea surface is below the tail of the rocket. The tank of the propellant loading system (4) is horizontally offset and vertically separated from the two sides of the main hull (12).

2. The compact self-elevating sea-based launch platform for liquid-fueled launch vehicles according to claim 1, characterized in that, The main hull (12) is vertically arranged with at least two layers, and the lowest layer of the main hull (12) floats on the water surface; the support legs (11) are vertically arranged, and at least three support legs (11) are raised and lowered to connect to the main hull (12), and the bottom of the support legs (11) abuts against the seabed when they descend.

3. The compact self-elevating sea-based launch platform for liquid-fueled launch vehicles according to claim 2, characterized in that, The rocket storage system (2) includes: a first gate (21), a retractable roof (22), a warehouse wall (23), and a second gate (24); the warehouse wall (23) is spaced apart and extends along the main hull (12) and is fixed to the top of the main hull (12). The two ends of the warehouse wall (23) are connected by a first gate (21) near the stern and a second gate (24) near the bow. The first gate (21) and the second gate (24) can be opened and closed in the horizontal direction respectively. The telescopic roof (22) is slidably connected to the upper end of the warehouse wall (23) and slides and retracts towards the bow. The first gate (21), the telescopic roof (22), the warehouse wall (23) and the second gate (24) constitute the rocket warehouse.

4. The compact self-elevating sea-based launch platform for liquid-fueled launch vehicles according to claim 3, characterized in that, The propellant loading system (4) includes: a first propellant tank (41), a second propellant tank (42), and a command ship control system; the first propellant tank (41) and the second propellant tank (42) are arranged on different layers of the main hull (12), and the first propellant tank (41) and the second propellant tank (42) are located on opposite sides of each other, and the first propellant tank (41) and the second propellant tank (42) respectively store the rocket's oxidizer and reducing agent; the command ship control system is a command ship docked at a safe distance.

5. The compact self-elevating sea-based launch platform for liquid-fueled launch vehicles according to claim 4, characterized in that, The launch system (5) includes: a hydraulic erection pit (52), a hydraulic erection device (53), a launch pad (55), a restraint release device (56), and a deck inclined support (57). The launch pad (55) is located at the top of the main hull (12) near the stern; the upper main hull (12) extends horizontally, and the launch pad (55) is vertically offset from the lower main hull (12); a deck diagonal brace (57) is provided between the extended end of the upper main hull (12) and the end of the lower main hull (12). A hydraulic erection pit (52) is provided between the launch pad (55) and the first gate (21); the hydraulic erection device (53) is housed in the hydraulic erection pit (52); the tail of the horizontal launch vehicle (51) is connected to the hydraulic erection device (53) and erected; the restraint release device (56) is set above the launch pad (55) and the restraint release device (56) fixes the vertical launch vehicle (54).

6. A method of using a compact self-elevating sea-based launch platform for liquid-propellant rockets, employing the compact self-elevating sea-based launch platform for liquid-propellant rockets as described in any one of claims 1-5, comprising the following steps: Step S1: The launch platform is driven to the dock and the upper main hull (12) of the launch platform is connected to the dock by a pier. Then, the rocket in a horizontal position is transported from the land to the launch platform by a transport vehicle along the pier. Step S2: Open the gate of the rocket storage room near the bow of the ship, and the transport vehicle carries the rockets into the rocket storage room. After all the rockets are in the rocket storage room, close the storage room gate. Step S3: The launch platform proceeds to the designated launch area, during which time the rocket storage area remains closed; Step S4: After the launch platform arrives at the designated sea area, its support legs (11) are fixed to the seabed and the main hull (12) is raised to a certain height to maintain stability; Step S5: Open the door of the rocket storage room near the stern of the ship, and the transport vehicle carrying the rocket drives to the launch pad (55) at the stern of the ship; Step S6: The telescopic roof (22) of the rocket storage room retracts and opens to ensure sufficient space above the rocket during erection; the rocket is erected using the erection hydraulic device (53) located in the erection hydraulic pit (52) at the tail of the launch platform. After erection, the tail of the rocket is docked with the launch pad (55), and the rocket storage room door and roof are closed. Step S7: The propellant loading system (4) loads the rocket into the erected position; Step S8: After fueling is completed, ignition is performed and the rocket is launched.

7. The method of using the compact self-elevating sea-based launch platform for liquid-fueled rockets according to claim 6, characterized in that, In step S1: The main hull (12) adjusts the ballast water to adjust the height of the main hull (12) deck and the dock platform, and the propulsion system adjusts the distance between the main hull deck and the dock.

8. The method of using the compact self-elevating sea-based launch platform for liquid-fueled rockets according to claim 6, characterized in that, In step S5: The transport vehicle operates using magnetic stripe navigation and positioning, with the rocket axis aligned with the launch pad (55) axis.

9. The method of using the compact self-elevating sea-based launch platform for liquid-fueled rockets according to claim 6, characterized in that, In step S7: Remote, unattended refueling of propellants is carried out by a command ship docked at a safe distance.

10. The method of using the compact self-elevating sea-based launch platform for liquid-fueled launch vehicles according to claim 6, characterized in that, In step S8: Remote telemetry and ignition control are conducted from a command ship positioned at a safe distance.

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