Self-propelled multipurpose maintenance platform

Abstract

The invention provides a self-propelled multipurpose maintenance platform, and belongs to the field of ship maintenance and emergency rescue. The self-propelled multipurpose maintenance platform comprises a streamline main ship body, an upper broadside buoyancy tank and a broadside fixing device, a pier distribution area deck is arranged at the top of the streamline main ship body, a propeller is arranged at the bottom of the streamline main ship body, and a water ballast space and a ballast pump space connected with the water ballast space are arranged in the streamline main ship body; the upper broadside buoyancy tank comprises a port buoyancy tank and a starboard buoyancy tank which are identical in structure and arranged at the top of the streamline main hull, the port buoyancy tank and the starboard buoyancy tank are symmetrically arranged relative to the center line of the streamline main hull, and the broadside fixing device is arranged on the outer side of at least one of the port buoyancy tank and the starboard buoyancy tank and used for being fixedly connected with a wharf. According to the maintenance platform, wharf maintenance and open sea maintenance of the ship can be considered at the same time, and the work adaptability and the utilization rate are improved while the operation and maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of ship maintenance and emergency rescue, and in particular to a self-propelled multi-purpose maintenance platform. Background Art

[0002] During long-term navigation or transportation, the bottom of a ship is prone to collide with underwater obstacles and become deformed and damaged. At the same time, the water body and aquatic organisms can cause corrosion and peeling of the paint layer on the bottom of the ship, and even corrosion of the metal layer on the bottom of the ship, requiring regular inspection and maintenance.

[0003] In the related technology, the existing ship repair is generally carried out in a land dock or a floating dock. The factory tows the ship to be repaired to the dock, and the ship is repaired after it sits on the bottom of the dock. For ships that are wrecked in the open sea, they need to be transferred to the dock for repair by a semi-submersible ship or tugboat.

[0004] However, a floating dock is a square platform with a small draft, which does not have the self-propulsion function and has poor maneuverability. It can only repair ships at the dock and does not have the ability to perform offshore rescue. Semi-submersible ships have a large draft and tonnage and are generally used for offshore salvage and rescue, but are not suitable for dock repairs. Therefore, the maintenance platforms of the two types of ships often need to be built separately, with low utilization rates, high corresponding operation and maintenance costs, and poor overall benefits. Summary of the invention

[0005] The embodiment of the present invention provides a self-propelled multi-purpose maintenance platform, which can take into account both dock maintenance and offshore maintenance of ships, while reducing operation and maintenance costs and improving work adaptability and utilization rate. The technical solution is as follows: The embodiment of the present invention provides a self-propelled multi-purpose maintenance platform, comprising: a streamlined main hull, an upper side buoyancy box and a side fixing device, A pier area deck is arranged on the top of the streamlined main hull, a propeller is arranged on the bottom of the streamlined main hull, and a ballast water tank and a ballast pump room connected to the ballast water tank are arranged inside the streamlined main hull; The upper side pontoons include a port pontoon and a starboard pontoon with the same structure and arranged on the top of the streamlined main hull. The port pontoon and the starboard pontoon are arranged symmetrically with respect to the centerline of the streamlined main hull. The side fixing device is arranged on the outside of at least one of the port pontoon and the starboard pontoon for fixed connection with the dock.

[0006] Optionally, the propeller includes a stern propeller and a bow propeller, and the stern of the streamlined main hull is provided with a stern propulsion cabin, and the stern propeller is arranged in the stern propulsion cabin; two bow propulsion cabins are symmetrically arranged on both sides of the bow of the streamlined main hull, and the bow propeller is arranged in the bow propulsion cabin, and the stern propeller and the bow propeller are both fully rotating propellers.

[0007] Optionally, the top deck height of the stern propulsion cabin is higher than the deck height of the dock area; the bow propulsion cabin is arranged in a vertical direction, and the bow thruster is telescopically installed in the bow propulsion cabin.

[0008] Optionally, a connecting passage is provided in the streamlined main hull, and the stern propulsion cabin and the ballast pump cabin are connected via the connecting passage.

[0009] Optionally, a multi-story building area is provided on the top of the upper side pontoon in the vertical direction, and the upper side pontoon is provided with a longitudinal passage connecting the top with the streamlined main hull and passing through the multi-story building area.

[0010] Optionally, a plurality of longitudinal channels are provided and are evenly spaced apart along the hull direction of the streamlined main hull.

[0011] Optionally, a crane is provided in the building area located at the uppermost level.

[0012] Optionally, a plurality of anchor chain lockers are provided on the upper side pontoon, and the plurality of anchor chain lockers are arranged at intervals along the hull direction of the streamlined main hull.

[0013] Optionally, a plurality of dock piers are arranged on the deck of the dock area.

[0014] Optionally, the side fixing device is provided in plurality along the hull direction of the streamlined main hull, including fixed guide posts and fixed clamps matching the fixed guide posts, the fixed guide posts are arranged at intervals on the sides of the upper side pontoons and are connected to the upper side pontoons through a fixed base, and the fixed clamps are used for being opened and closed and fixedly installed on the dock.

[0015] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention include at least: The self-propelled multi-purpose maintenance platform provided by the embodiment of the present invention can be used to lower the waterline by discharging the ballast water in the ballast tank when there is no need for offshore operations. The platform can be docked at a dock in a shallow water area as a whole, and the side fixing device provided on the outer side of the upper side pontoon on the side can be docked and fixed to the dock to carry out berthing and maintenance work on the cargo or ship to be repaired as a floating dock or warehouse. When offshore rescue work is required, the self-propelled multi-purpose maintenance platform can unlock the side fixing device and use the propeller to achieve autonomous navigation. By adjusting its own ballast water, water is injected into the ballast tank to raise the waterline of the entire streamlined hull, so that the entire deck of the pier area is submerged in the water, so that the specific cargo to be carried, such as barges, yachts, ships, drilling platforms, etc., can be floated from a designated location to the area where the deck of the pier area is located, and then the cargo can be transported to the designated location in a semi-submerged state, or repaired at sea. By taking into account both the dock maintenance and offshore maintenance of the ship, the work adaptability and utilization rate can be improved while reducing the operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the general layout of a self-propelled multi-purpose maintenance platform provided by an embodiment of the present invention; Figure 2 yes Figure 1 AA section view in the figure; Figure 3 yes Figure 1 BB section view in the figure; Figure 4 yes Figure 1 CC section view in the figure; Figure 5 yes Figure 1 DD section view; Figure 6 yes Figure 1 EE section view in.

[0018] In the figure: 1- streamlined hull; 1a- bow; 1b- stern; 2- upper side pontoons; 2a- port pontoons; 2b- starboard pontoons; 3- side fixtures; 11- dock area deck; 12- thrusters; 13- ballast tanks; 14- ballast pump room; 15- stern propulsion compartment; 16- bow propulsion compartment; 17- connecting passage; 18- longitudinal passage; 21- building area; 22- chain locker; 23- pontoon ballast tank area; 31- fixed guide column; 32- fixed clamp; 33- fixed base; 111- dock; 121- stern thruster; 122- bow thruster; 211- crane; m- wharf. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the general layout of a self-propelled multi-purpose maintenance platform provided by an embodiment of the present invention; Figure 2 yes Figure 1 AA section view in the figure; Figure 3 yes Figure 1 BB section view in the figure; Figure 4 yes Figure 1 CC section view in the figure; Figure 5 yes Figure 1 DD section view; Figure 6 yes Figure 1 EE section view in the figure. Figures 1 to 6 As shown, an embodiment of the present invention provides a self-propelled multi-purpose maintenance platform, including a streamlined main hull 1, an upper side pontoon 2 and a side fixing device 3.

[0021] Among them, a pier area deck 11 is arranged on the top of the streamlined main hull 1, a propeller 12 is arranged on the bottom of the streamlined main hull 1, and a ballast water tank 13 and a ballast pump room 14 connected to the ballast water tank 13 are arranged inside the streamlined main hull 1.

[0022] The upper side pontoons 2 include a port pontoon 2a and a starboard pontoon 2b of the same structure and arranged on the top of the streamlined main hull 1. The port pontoon 2a and the starboard pontoon 2b are arranged symmetrically with respect to the center line of the streamlined main hull 1, and the side fixing device 3 is arranged on the outside of at least one of the port pontoon 2a and the starboard pontoon 2b for fixed connection with the dock m.

[0023] In the embodiment of the invention, the maximum length of the streamlined main hull 1 in the hull direction ranges from 180 to 200m, the ship width ranges from 35 to 40m, the dock area deck 11 as the main hull deck adopts a stepped ship-lifting deck, and its deck height ranges from 5 to 6m, which has the characteristics of low height. The bow 1a and the stern 1b adopt arc transition in the contour to provide lifting force and water surface stability for the maintenance platform, ensuring that the maintenance platform has a small draft and deck height to adapt to maintenance operations in shallow water areas of the dock. Among them, the total length of the bow 1a ranges from 16 to 18m, with a flow angle of 20 to 25°, and the waterline surface is arc-shaped. The total length of the stern 1b is 17 to 20 meters, divided into two sections, the bow section is 12 to 14 meters long, with a 15~20° flow angle, and a "U"-shaped waterline, while the stern section is 5 to 6 meters long and straight, with an arc transition at the intersection of the side plate and the bottom plate. The streamlined main hull 1 is equipped with 7 watertight transverse bulkheads and 3 watertight longitudinal bulkheads, dividing the maintenance platform into several watertight compartment areas to meet the damage stability requirements of the specification. Furthermore, a ballast water system is arranged inside the streamlined main hull 1, which mainly includes a ballast water tank 13 and a ballast pump room 14 connected to the ballast water tank 13. Among them, there are multiple ballast pump cabins 14 arranged and symmetrically arranged along the left and right sides of the streamlined main hull 1. Each ballast pump cabin 14 is equipped with a ballast pump. The motor power of the ballast pump is 100 to 150kW, the flow rate is 3500 to 4000m³ / h, and the pressure is 0.1 to 0.15MPa. There are 30 to 35 ballast water tanks 13. The ballast pumps in the ballast pump cabins 14 provide power to realize the filling and drainage of the ballast water tanks 13, so as to adjust the center of gravity, buoyancy and stability of the entire streamlined main hull 1 and the self-propelled multi-purpose maintenance platform. Furthermore, a propeller 12 is also provided at the bottom of the streamlined main hull 1, and the propeller 12 can provide power to enable the entire streamlined main hull 1 and the self-propelled multi-purpose maintenance platform to sail on the water. On the top of the above-mentioned streamlined main hull 1, the port pontoon 2a and the starboard pontoon 2b are symmetrically arranged on the left and right sides of the hull direction. The outer sides of the port pontoon 2a and the starboard pontoon 2b are respectively flush with the two sides of the streamlined main hull 1. The width of a single pontoon structure ranges from 4.5 to 5.5m and the length ranges from 140 to 150m. A watertight deck is arranged on the top of the upper side pontoon 2 as a safety deck, and the height of the safety deck is 17 to 18m from the bottom of the streamlined main hull 1. The port pontoon 2a and the starboard pontoon 2b can be used as a place for maintenance and construction equipment such as cranes and cranes, and provide work and living space for relevant personnel. The symmetrical arrangement of the two can also provide semi-submerged stability for the maintenance platform when it is semi-submerged in the open sea.

[0024] The self-propelled multi-purpose maintenance platform provided by the embodiment of the present invention can be used to lower the waterline by discharging the ballast water in the ballast tank 13 when there is no need to carry out offshore operations, so that the platform can be docked at the pier m in the shallow water area as a whole, and the side fixing device 3 arranged on the outer side of the upper side pontoon 2 can be docked and fixed to the pier m, so as to carry out berthing and maintenance construction for the goods or ships to be repaired as a floating dock or warehouse. When offshore rescue work is required, the self-propelled multi-purpose maintenance platform can realize autonomous navigation by releasing the lock of the side fixing device 3 and using the propeller 12. By adjusting its own ballast water, water is injected into the ballast tank 13 to raise the waterline of the entire streamlined hull 1, so that the entire pier area deck 11 is submerged in the water, so that the specific goods to be carried, such as barges, yachts, ships, drilling platforms, etc., can be floated from the designated position to the area where the pier area deck 11 is located, and then the goods can be transported to the designated position in a semi-submerged state, or repaired at sea. By taking into account both the ship's dock maintenance and offshore maintenance, the work adaptability and utilization rate can be improved while reducing operation and maintenance costs.

[0025] Exemplarily, in an embodiment of the present invention, a pontoon ballast water tank area 23 is also provided in the port pontoon 2a and the starboard pontoon 2b, and its function is the same as that of the ballast water tank 13, and a watertight transverse bulkhead is provided at the corresponding position thereof, extending all the way to the top safety deck of the port pontoon 2a and the starboard pontoon 2b.

[0026] Optionally, the propeller 12 includes a stern propeller 121 and a bow propeller 122. The stern of the streamlined main hull 1 is provided with a stern propulsion cabin 15, and the stern propeller 121 is arranged in the stern propulsion cabin 15; two bow propulsion cabins 16 are symmetrically arranged on both sides of the bow of the streamlined main hull 1, and the bow propeller 122 is arranged in the bow propulsion cabin 16. The stern propeller 121 and the bow propeller 122 are all full-rotation propellers. Exemplarily, in an embodiment of the invention, the stern propulsion cabin 15 is arranged in the stern 1b area of ​​the streamlined main hull 1, and three stern propulsion cabins 15 are arranged in parallel and spaced apart in the stern propulsion cabin 15 to ensure that the maintenance platform has a greater self-propulsion capability. Furthermore, two bow propulsion cabins 16 are symmetrically arranged on both sides of the bow 1a of the streamlined main hull 1 near the stern section. By arranging a bow propeller 122 in the form of a full-rotating propeller, the maintenance platform is provided with steering control and dynamic positioning functions during propulsion in and out, thereby improving its self-propulsion capability.

[0027] Optionally, the top deck height of the stern propulsion cabin 15 is higher than the height of the deck 11 in the dock area; the bow propulsion cabin 16 is arranged in the vertical direction, and the bow propeller 122 is telescopically installed in the bow propulsion cabin 16. Exemplarily, in the embodiment of the present invention, the top deck of the stern 1b area where the stern propulsion cabin 15 is located adopts a stepped deck form, and its height is higher than the height of the deck 11 in the dock area. The purpose is to provide the maintenance platform with the ability to self-propel in the open sea, and to raise the stern section 1b relative to the bottom of the streamlined main hull 1 as a whole, so as to facilitate the fixed installation of a large-sized full-rotation propeller in the stern propulsion cabin 15 without increasing the height of the deck 11 in the dock area, thereby ensuring the self-propulsion ability of the maintenance platform and avoiding the low deck height requirement when it is usually docked at the dock as a floating dock, thereby ensuring adaptability. Furthermore, the bow propulsion cabin 16 for installing the bow propulsion unit 122 adopts a longitudinally arranged vertical shaft structure, and a mobile platform is arranged inside to realize the retractable arrangement of the bow propulsion unit 122. When it is necessary to carry out offshore operations, the bow propulsion unit 122 extends from the bottom of the bow propulsion cabin 16 to the bottom of the ship, providing the maintenance platform with maneuvering and dynamic positioning functions. When docked at the dock for operation, it can be retracted upwards into the streamlined main hull 1 to meet the shallow draft operation requirements of the dock.

[0028] Optionally, a connecting passage 17 is provided in the streamlined main hull 1, and the stern propulsion cabin 15 and the ballast pump cabin 14 are connected through the connecting passage 17. Exemplarily, in an embodiment of the present invention, two connecting passages 17 are symmetrically provided on the left and right sides of the hull direction in the streamlined main hull 1. In order to avoid affecting the diving ability of the maintenance platform, the width range is set to 1.2 to 1.5m, and the connecting passage 17 is connected to multiple ballast pump cabins 14 and the stern propulsion cabin 15, and each connection is provided with a slide-type watertight door. On the basis of providing the staff with the requirements of traveling in each cabin and arranging the pipeline route, the isolation and damage stability between the cabins are guaranteed.

[0029] Optionally, a multi-story building area 21 is arranged on the top of the upper side pontoon 2 in the vertical direction, and the upper side pontoon 2 is provided with a longitudinal passage 18 connecting the top with the streamlined main hull 1 and passing through the multi-story building area 21. Exemplarily, in the embodiment of the present invention, upper and lower two-story building areas 21 are arranged on the top safety decks of the port pontoon 2a and the starboard pontoon 2b. The building area 21 located on the lower floor is mainly arranged with the maintenance platform's own support equipment, and the main equipment includes diesel generator sets, power distribution systems, communication and navigation systems, fire protection systems, living water systems, platform monitoring systems, etc. The building area 21 located on the upper floor is mainly arranged with personnel living areas, living areas, kitchens and restaurants, as well as maintenance platform machine repair workshops and electrician workshops, and the main equipment includes lathes, milling machines, welding machines, oxygen acetylene systems, and repair compressed air systems. By configuring a multi-layer building area 21 structure, the division of labor between personnel living and maintenance and construction areas and settings is achieved, and a longitudinal passage 18 is formed by a longitudinally arranged multi-layer staircase structure to enable personnel to move between the building areas 21 on each floor, the pier area deck 11 of the streamlined main hull 1, and the internal cabin area.

[0030] Optionally, a plurality of longitudinal channels 18 are provided, and are evenly spaced along the hull direction of the streamlined main hull 1. Exemplarily, in an embodiment of the present invention, on the port pontoon 2a and the starboard pontoon 2b, three longitudinal channels 18 are provided along the hull direction of the streamlined main hull 1, respectively, not close to the bow 1a side, close to the stern 1b side, and the middle of the upper side pontoon 2. The overall distribution is reasonable, which is convenient for the overall pipeline layout and the efficient movement of the staff. Among them, the front and rear dimensions of the longitudinal channel 18 located in the middle should be as small as possible to meet the needs of personnel passing up and down and laying pipelines, while avoiding reducing the pontoon water tank area 23, and further ensuring the diving ability of the maintenance platform.

[0031] Optionally, the building area 21 located on the uppermost floor is provided with a crane 211. Exemplarily, in the embodiment of the present invention, 6 to 8 cranes 211 are provided on the building area 21 located on the uppermost floor, with a maximum turning radius ranging from 24 to 28 m and a rated lifting capacity of 10 to 15 t, which can meet the maintenance needs of the ships and cargoes on the deck 11 of the dock area.

[0032] Optionally, it is characterized in that a plurality of anchor chain lockers 22 are provided on the upper side pontoon 2, and the plurality of anchor chain lockers 22 are arranged at intervals along the hull direction of the streamlined main hull 1. Exemplarily, in an embodiment of the present invention, two anchor chain lockers 22 are provided on the port pontoon 2a and the starboard pontoon 2b, and anchor chain winches are arranged inside the anchor chain lockers and anchor chains for anchoring and fixing the maintenance platform are stored, which are used to be lowered and used when mooring and positioning are required to ensure mooring stability and offshore positioning capability. Further, the anchor chain lockers 22 are located in the lower layer of the building area 21 on the top of the port pontoon 2a and the starboard pontoon 2b, and their size is sufficient to store facilities such as anchor chains and winches of the maintenance platform, so as to avoid lowering the pontoon ballast water tank area 23 on the upper side pontoon 2, so as to ensure the diving capability of the platform for maintenance.

[0033] Optionally, it is characterized in that a plurality of docking piers 111 are arranged on the dock area deck 11. Exemplarily, in an embodiment of the present invention, the dock area deck 11 can be provided with a plurality of docking piers 111 in different arrangement spacings and ways according to actual maintenance needs, and the form and structure of the docking piers 111 are customized to stably support the ship or platform to be repaired.

[0034] Optionally, a plurality of side fixing devices 3 are provided along the hull direction of the streamlined main hull 1, including fixed guide posts 31 and fixed clamps 32 matched with the fixed guide posts 31, the fixed guide posts 31 are arranged at intervals on the side of the upper side pontoon 2 and connected to the upper side pontoon 2 through a fixed base 33, and the fixed clamps 32 are used to be fixedly installed on the dock m in an openable and closable manner. Exemplarily, in an embodiment of the present invention, the fixed guide posts 31 are hollow steel pipes to reduce weight, and their diameters should be designed according to the wind and wave strength requirements of the maintenance platform when operating at the dock. At least two fixed guide posts 31 are provided on the side of the streamlined main hull 1, and are longitudinally arranged and connected to the outer side of the upper side pontoon 2 through a fixed base 33. The matching fixed clamps 32 are installed on the dock water conservancy foundation, and the fixed clamps 32 can be opened and closed. When the fixed clamps 32 are closed, the maintenance platform is fixed to the dock by clamping the main fixed guide posts 31, and when the fixed clamps 32 are opened, the maintenance platform is separated from the dock and can sail freely away from the dock. Furthermore, the side fixing device 3 connects the streamlined main hull 1 to the shore. The shore-based facilities should be designed separately for hydraulic engineering, and their strength and other aspects should meet the requirements of relevant specifications. The shore-based facilities should be equipped with protective piers to prevent the maintenance platform from colliding with the strong foundation and causing damage.

[0035] ‌ Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and are extremely equivalent, and do not exclude other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] The above descriptions are merely optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-propelled multi-purpose maintenance platform, characterized in that: include: A streamlined main hull (1), an upper side buoyancy box (2) and a side fixing device (3), The streamlined main hull (1) is provided with a dock area deck (11) on the top, the streamlined main hull (1) is provided with a propeller (12) on the bottom, and the streamlined main hull (1) is provided with a ballast water tank (13) and a ballast pump room (14) connected to the ballast water tank (13) inside. The upper side pontoon (2) comprises a port pontoon (2a) and a starboard pontoon (2b) of identical structure and arranged on the top of the streamlined main hull (1); the port pontoon (2a) and the starboard pontoon (2b) are arranged symmetrically with respect to the centerline of the streamlined main hull (1); the side fixing device (3) is arranged on the outside of at least one of the port pontoon (2a) and the starboard pontoon (2b) for fixed connection with a dock (m).

2. The self-propelled multi-purpose maintenance platform according to claim 1, characterized in that: The propeller (12) comprises a stern propeller (121) and a bow propeller (122); a stern propulsion cabin (15) is provided at the stern of the streamlined main hull (1), and the stern propeller (121) is arranged in the stern propulsion cabin (15); two bow propulsion cabins (16) are symmetrically provided on both sides of the bow of the streamlined main hull (1), and the bow propeller (122) is arranged in the bow propulsion cabin (16); the stern propeller (121) and the bow propeller (122) are both omnidirectional propellers.

3. The self-propelled multi-purpose maintenance platform according to claim 2, characterized in that: The top deck height of the stern propulsion cabin (15) is higher than the height of the dock area deck (11); the bow propulsion cabin (16) is arranged in a vertical direction, and the bow thruster (122) is telescopically installed in the bow propulsion cabin (16).

4. The self-propelled multi-purpose maintenance platform according to claim 3, characterized in that: A connecting passage (17) is provided in the streamlined main hull (1), and the stern propulsion cabin (15) and the ballast pump cabin (14) are both connected via the connecting passage (17).

5. The self-propelled multi-purpose maintenance platform according to any one of claims 1 to 4, characterized in that: A multi-story building area (21) is provided on the top of the upper side pontoon (2) in the vertical direction, and the upper side pontoon (2) is provided with a longitudinal passage (18) connecting the top with the streamlined main hull (1) and passing through the multi-story building area (21).

6. The self-propelled multi-purpose maintenance platform according to claim 5, characterized in that: A plurality of longitudinal channels (18) are provided, and are evenly spaced and arranged along the hull direction of the streamlined main hull (1).

7. The self-propelled multi-purpose maintenance platform according to claim 5, characterized in that: The building area (21) located at the uppermost level is provided with a crane (211).

8. The self-propelled multi-purpose maintenance platform according to any one of claims 1 to 4, characterized in that: A plurality of anchor chain lockers (22) are provided on the upper side buoy (2), and the plurality of anchor chain lockers (22) are arranged at intervals along the hull direction of the streamlined main hull (1).

9. The self-propelled multi-purpose maintenance platform according to any one of claims 1 to 4, characterized in that: A plurality of dock piers (111) are arranged on the dock area deck (11).

10. The self-propelled multi-purpose maintenance platform according to any one of claims 1 to 4, characterized in that: The side fixing devices (3) are arranged in a plurality along the hull direction of the streamlined main hull (1), and include fixed guide columns (31) and fixed clamps (32) matching the fixed guide columns (31). The fixed guide columns (31) are arranged at intervals on the side of the upper side buoyancy box (2) and are connected to the upper side buoyancy box (2) via a fixed base (33). The fixed clamps (32) are used for being fixedly installed on the dock (m) in an openable and closable manner.

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