Raft type self-elevating and self-in-place offshore elevating platform and using method

Abstract

The invention discloses a raft type self-lifting and self-in-place offshore elevating platform and a using method, the raft type self-lifting and self-in-place offshore elevating platform comprises a floating body module, and an elevating module, a pile leg supporting module, a lifting locking module, a control and power module and a sludge flushing device which are arranged on the floating body module, the control and power module is used for driving the floating body module to move on the sea surface, the climbing module can allow people to stand for climbing operation, the multiple lifting locking modules are evenly distributed on the floating body module, the multiple pile leg supporting modules correspond to the multiple lifting locking modules, one end of each pile leg supporting module sequentially penetrates through the corresponding lifting locking module, and the other end of each pile leg supporting module penetrates through the corresponding lifting locking module. The floating body module is meshed with the lifting locking module, the lifting locking module can drive the pile leg supporting module to vertically move along the lifting locking module, the pile leg supporting module can be lowered through the locking module to be fixed to the seabed, the floating body module is lifted to the preset wave avoiding height, and the sludge flushing device is connected to the bottom of the pile leg supporting module. The sludge flushing device is used for flushing sludge.

Description

Technical Field

[0001] The invention relates to the technical field of marine engineering construction, and in particular to a raft-type self-elevating and self-positioning offshore ascending platform and a use method thereof. Background Art

[0002] Marine engineering is one of the key development directions in my country's future engineering construction field. Considering the difficulty of offshore assembly, large-scale modular assembly production on shore, large-scale module splicing at sea, and electrical and equipment installation are the development directions of future construction projects.

[0003] Offshore marine projects are often large in size and high above the water surface. Currently, there is a lack of dedicated climbing equipment for offshore splicing and equipment installation: Currently, most people use the method of fixing land-based climbing equipment on board or setting up ladders, which have poor wave resistance and prominent swaying problems, and cannot guarantee personnel safety and work efficiency.

[0004] For example, announcement number CN106245617B discloses an offshore lifting platform system, including a platform and pile legs for supporting the platform, characterized in that it also includes a well installed on the platform, the well including a limiting hole section for radially limiting the pile legs, and an accommodating hole section for accommodating the deflection deformation of the pile legs, the limiting hole section is coaxial with the accommodating hole section, and the limiting hole section is arranged at the longitudinal end of the well, the accommodating hole section is arranged in the longitudinal interior of the well, and the inner diameter of the accommodating hole section is larger than the inner diameter of the limiting hole section.

[0005] When the platform system is actually used, after the pile legs are moved vertically and inserted into the seabed, the pile legs come into contact with mud and sand in the seabed. The mud and sand will cause a large suction force on the pile legs, making it difficult to recover the pile legs, making the overall platform system unreliable. Summary of the invention

[0006] In view of the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a raft-type self-elevating and self-positioning offshore climbing platform and a method of use, which can accurately locate the offshore operation site through a floating module; fix it to the seabed by lowering the pile leg support module; combine the pile leg support module and the lifting and locking module to achieve the floating module to lift the sea surface to a predetermined wave avoidance height, and when the pile leg support module is recovered, the silt is flushed through a silt flushing device, thereby greatly improving the efficiency and reliability of recovery.

[0007] In order to achieve the above-mentioned purpose, the raft-type self-elevating and self-positioning offshore climbing platform provided by the present invention includes a floating body module and a climbing module arranged on the floating body module, a plurality of pile leg support modules, a plurality of lifting and locking modules, a control and power module, and a sludge flushing device. The floating body module can float on the sea surface, and the climbing module can be used for personnel to stand on to perform climbing operations. The plurality of lifting and locking modules are evenly distributed on the floating body module, and the plurality of pile leg support modules correspond to the plurality of lifting and locking modules. One end of the pile leg support module passes through the lifting and locking module in sequence, and the floating body module is engaged with the lifting and locking module. The lifting and locking module can drive the pile leg support module to move vertically along it, and the pile leg support module can be lowered and fixed to the seabed through the locking module, and the floating body module can lift the sea surface to a predetermined wave avoidance height. The sludge flushing device is connected to the bottom of the pile leg support module, and can flush the sludge when the pile leg support module is recovered. The control and power module is used to drive the floating body module to move on the sea surface and control the lifting and locking module.

[0008] Furthermore, the floating body module is formed by stacking and connecting the floating body bottom shell, the floating body keel and the floating body deck in sequence;

[0009] The bottom shell of the floating body is provided with a partition, the partition divides the bottom shell of the floating body, the space inside the partition is a water pressure tank, the space outside the partition is a power cabin of the floating body, the top of the partition is provided with a cover plate, the cover plate seals the water pressure tank, the floating body deck is connected to the top of the bottom shell of the floating body, the floating deck seals the power cabin of the floating body, the floating body keel is connected to the partition plate and is located between the bottom shell of the floating body and the floating deck, and is used to bear the overall force of the floating body module;

[0010] The bottom shell of the floating body is provided with a pile guide cylinder, the deck of the floating body is provided with a deck pile guide hole, the cover plate is provided with a cover plate guide hole, the floating body deck and the cover plate pass through the deck pile guide hole respectively, the cover plate guide hole is sleeved on the pile guide cylinder, the pile guide cylinder is arranged through the bottom shell of the floating body, the top end of the pile guide cylinder is sequentially penetrated with the cover plate guide hole, and the deck pile guide hole is located on the floating body deck for the pile leg support module to pass through;

[0011] The side wall of the bottom shell of the floating body is provided with a plurality of propeller water inlet pipes and propeller water outlet pipes connected with the floating body power cabin. The propulsion equipment of the control and power module can be placed in the floating body power cabin. The propulsion equipment is connected with the propeller water inlet pipe and the propeller water outlet pipe respectively.

[0012] A water pump is provided in the pressure water tank, and a water pump inlet and outlet hole connected to the pressure water tank is provided on the side wall of the bottom shell of the floating body, and the water pump pumps out and discharges water from the pressure water tank through the water pump inlet and outlet hole; a deck fence is provided on the side wall of the floating body deck, and a plurality of floating mooring piles are provided in sequence at equal intervals along the circumference of the deck fence, and a plurality of inspection hatches are also provided on the top of the floating body deck, which correspond to the pressure water tank and the floating body power cabin respectively, to form an inspection channel;

[0013] A plurality of level sensors are arranged on the top of the floating body deck for detecting the levelness of the floating body module.

[0014] Furthermore, the climbing module is an electric climbing device, which adopts a scissor-type or curved arm-type lifting method.

[0015] Furthermore, the lifting and locking module includes an electric drive climbing module and a locking module.

[0016] The electric-driven climbing module is arranged on the floating body deck and is provided with a through hole corresponding to the pile sinking guide cylinder, the through hole can be penetrated by the pile leg support module and is arranged coaxially with the pile sinking guide cylinder, the electric-driven climbing module has a built-in climbing gear set, a climbing motor and a control device,

[0017] The climbing gear set is driven by the climbing motor and the control device and is partially exposed in the through hole and meshes with the pile leg support module. The climbing gear set drives the floating body module to rise and the pile leg support module to pre-press and recover;

[0018] The locking module is composed of a plurality of symmetrically placed retractable locking devices.

[0019] Furthermore, the pile leg support module is composed of a steel pipe pile body, a pile leg posture adjustment actuator, and a pile shoe;

[0020] The steel pipe pile body passes through the through hole and the pile sinking guide cylinder in sequence, and the steel pipe pile body is provided with a plurality of platform locking holes, a platform rising guide rail, and a pile body angle sensor;

[0021] The plurality of platform locking holes are arranged vertically in sequence and are used to cooperate with the locking module. The locking tongue in the locking module extends out and is inserted into the platform locking hole to realize the vertical fixation of the steel pipe pile body.

[0022] The platform ascending guide rail is meshedly connected with the climbing gear set, the pile body angle sensor is used to monitor the inclination angle of the steel pipe pile body in real time, and the pile shoe is used to contact the seabed;

[0023] A pile shoe sleeve is provided on the top of the pile shoe, the steel pipe pile body is sleeved on the pile shoe sleeve, an actuator fixed support is provided at the bottom of the steel pipe pile body, the pile leg posture adjustment actuator is located in the pile shoe sleeve and one end is fixed to the actuator fixed support, and the other end is connected to the top surface of the pile shoe.

[0024] Furthermore, the pile shoe is composed of two upper and lower butterfly plates connected by connection, and the two butterfly plates are connected to form a closed space inside. The pile shoe is provided with a pile shoe inner annular partition, and the pile shoe inner annular partition divides the closed space.

[0025] The outer side of the inner annular partition of the pile shoe and the butterfly disk form an outer closed space, and the inner side of the inner annular partition of the pile shoe and the butterfly disk form an inner closed space. A plurality of inner radial partitions of the pile shoe are arranged inside the pile shoe. The inner radial partitions of the pile shoe divide the outer closed space into a plurality of outer closed space units, and the inner radial partitions of the pile shoe divide the inner closed space into a plurality of inner closed space units.

[0026] The plurality of inner closed space units are all provided with a shoe plate central through pipe, which penetrates through the pile shoe and is used for guiding flow when the pile shoe moves vertically on the seabed.

[0027] The plurality of outer closed space units are each provided with a pile shoe pile flushing water spray pipe, which penetrates through the pile shoe setting; a sludge flushing device is provided in the outer closed space unit, and the sludge flushing device is connected to the pile shoe pile flushing water spray pipe.

[0028] Furthermore, the control and power module is placed on the floating body deck, and is composed of a fuel tank, a thruster, a control cabinet, a generator set, an energy storage battery and a rudder system. The thruster is divided into an in-cabin part and a cabin part. The in-cabin part is arranged in the floating body power cabin and is connected to the thruster water inlet pipe and the thruster water outlet pipe; the out-cabin part can be arranged on the floating body deck.

[0029] In order to achieve the above object, the present invention provides a method for using a raft-type self-elevating and self-positioning offshore climbing platform, which is used for any of the above items, and the method for using comprises:

[0030] S1: Use a suitable transport ship to transport the raft-type self-elevating and self-positioning offshore climbing platform to the operating sea area, and hoist it into the water. Move the platform to the predetermined operating position through remote control or driving control and power module. According to the operating position, use the anchor boat to tie the cable with one end tied to the floating mooring pile, drop anchor or tie the cable to the surrounding existing engineering structure to stabilize the platform in place;

[0031] S2: Remote control or manipulation of the platform releases the locking module, allowing the pile leg support module to slowly descend to the seabed. During this process, the climbing gear set in the electric drive climbing module, under the action of the climbing motor, engages the platform ascending guide rail to control the descending speed of the pile leg support module;

[0032] S3: After the pile leg support module touches the bottom, the pressure tank is filled with water in an appropriate amount, and the lifting and locking modules are used to pre-press the pile legs. During pre-pressing, the central through pipe of the shoe plate is used to guide the flow to ensure vertical pre-pressing, and the pile body angle sensor is used to monitor the pile body inclination in real time, and the locking module is used to slightly adjust the pile body angle to ensure that the climbing gear set and the platform ascending guide rail are tightly engaged. After the pre-pressing is completed, the pile leg attitude adjustment actuator is used to adjust the elevation of several pile leg support modules, and the floating body module is kept horizontal in combination with several horizontal sensor data;

[0033] S4: After confirming that the floating module remains horizontal and the pile leg support module is vertical, the electric drive climbing module, driven by the climbing motor and the control device, drives the climbing gear set along the platform ascending guide rail to lift the floating module as a whole, and at the same time slowly drains the water tank; during the ascent, the pile body angle sensor, the horizontal sensor and the overall posture of the platform are monitored. After the floating module rises to a predetermined height, the locking device is closed and its locking tongue is confirmed to enter the platform locking hole, the floating module and the pile leg support module are locked and fixed, and the climbing module is used for climbing operations;

[0034] S5: During disassembly, the floating module of the climbing module is lowered and the water tank is filled with water in the reverse order, and the pile leg support module is pulled out one by one. If the suction of the pile shoe is large during the process, the built-in silt flushing device can be used to flush the silt through the pile shoe flushing water spray pipe, and then the pile leg support module is lifted to the walking height by lifting the locking module, and the remote control or driving control and power module is used to move the platform to the next predetermined working position.

[0035] The present invention provides a raft-type self-elevating and self-positioning offshore climbing platform and a method for using the platform. The device arranges a sludge flushing device at the bottom of a pile leg supporting module so that sludge can be flushed through the sludge flushing device when the pile legs are recovered, thereby greatly improving the pile leg recovery efficiency and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] Figure 1 A schematic diagram of the overall structure of the raft-type self-elevating and self-positioning offshore climbing platform provided by the present invention;

[0038] Figure 2 A schematic diagram of the structure of a floating body module in a raft-type self-elevating and self-positioning offshore ascending platform provided by the present invention;

[0039] Figure 3 A schematic diagram of the explosion structure of the pile leg support module in the raft-type self-elevating and self-positioning offshore climbing platform provided by the present invention;

[0040] Figure 4A schematic diagram of the pile shoe of the pile leg support module and the pile leg posture adjustment actuator in the raft-type self-elevating and self-positioning offshore climbing platform provided by the present invention when they are connected in coordination;

[0041] Figure 5 A schematic diagram of the pile shoe and the raft type self-elevating self-positioning offshore climbing platform provided by the present invention;

[0042] Figure 6 A schematic diagram of the structure of a lifting and locking module in a raft-type self-elevating and self-positioning offshore climbing platform provided by the present invention;

[0043] Figure 7 A schematic diagram of the structure of the control and power modules in the raft-type self-elevating and self-positioning offshore climbing platform provided by the present invention;

[0044] Figure 8 The present invention provides a flow chart of a method for using the raft-type self-elevating and self-positioning offshore ascending platform.

[0045] Illustration Description:

[0046] Floating body module 100, climbing module 200, pile leg support module 300, lifting and locking module 400, control and power module 500;

[0047] Floating body bottom shell 110, bulkhead 111, pressure tank 112, floating body power cabin 113, cover plate 114, cover plate guide hole 114a, pile sinking guide cylinder 115, thruster water inlet pipe 116, thruster water outlet pipe 117, water pump 118, water pump inlet and outlet hole 119, floating body keel 120, floating body deck 130, deck pile guide hole 131, deck fence 132, floating mooring pile 133, inspection hatch 134, level sensor 135, steel pipe pile body 310, platform locking hole 311, platform rising guide rail 312, pile body angle sensor 313, Actuator fixed support 314, pile leg attitude adjustment actuator 320, pile shoe 330, pile shoe sleeve 330a, butterfly disc 331, pile shoe inner annular partition 332, pile shoe inner radial partition 333, pile shoe pile flushing water spray pipe 334, sludge flushing device 335, shoe disc center through pipe 336, electric drive climbing module 410, through hole 410a, climbing gear set 411, climbing motor and control device 412, locking module 420, fuel tank 510, thruster 520, control cabinet 530, generator set 540, energy storage battery 550, rudder system 560. DETAILED DESCRIPTION

[0048] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0049] See also Figure 1-Figure 4, which is a schematic structural diagram of the raft-type self-elevating and self-positioning offshore ascending platform provided by the present invention.

[0050] As can be seen from the diagram, the raft-type self-elevating and self-positioning offshore ascending platform provided by the present invention includes six components: a floating module 100, an ascending module 200, a plurality of pile leg supporting modules 300, a plurality of lifting and locking modules 400, a control and power module 500, and a sludge flushing device 335.

[0051] The floating module 100 is the main structure, used to carry other components. The climbing module 200 , a plurality of pile leg support modules 300 , a plurality of lifting and locking modules 400 , and a control and power module 500 are all arranged on the floating module 100 .

[0052] Furthermore, the floating module 100 can float on the sea surface, and the climbing module 200 can be used for personnel to stand and perform climbing operations;

[0053] Furthermore, a plurality of lifting and locking modules 400 are evenly distributed on the floating module 100, a plurality of pile leg support modules 300 correspond to the plurality of lifting and locking modules 400, one end of the pile leg support module 300 passes through the lifting and locking module 400 in sequence, the floating module 100 is meshed with the lifting and locking module 400, the lifting and locking module 400 can drive the pile leg support module 300 to move vertically along it, and the pile leg support module 300 can be lowered and fixed to the seabed through the lifting and locking module 400 and drive the floating module 100 to lift the sea surface to a predetermined wave avoidance height, the silt flushing device 335 is connected to the bottom of the pile leg support module 300, and can flush the silt when the pile leg support module 300 is recovered,

[0054] The control and power module 500 is used to drive the floating module 100 to move on the sea surface and to control the lifting and locking module 400 .

[0055] The device is precisely positioned at the offshore operation site through the floating module 100; fixed to the seabed by lowering the pile leg support module 300; combined with the pile leg support module 300 and the lifting and locking module 400, the floating module 100 is lifted to the predetermined wave avoidance height; stable climbing operation is achieved through the climbing module 200; and the platform's lifting and lowering control and in-situ driving are achieved through the control and power module 500.

[0056] The specific structure of the raft-type self-elevating and self-positioning offshore ascending platform will be described in detail below with reference to the accompanying drawings.

[0057] Specifically, Figure 2 The floating body module 100 in this embodiment is preferably in a disc shape, which is formed by a floating body bottom shell 110, a floating body keel 120, and a floating body deck 130 stacked and connected in sequence.

[0058] A partition 111 is provided on the floating bottom shell 110, and the partition 111 divides the floating bottom shell 110. The inner space of the partition 110 is a pressure tank 112, and the outer space of the partition 110 is a floating power compartment 113. A cover plate 114 is provided on the top of the partition 111, and the cover plate 114 seals the pressure tank 112. The floating deck 130 is connected to the top of the floating bottom shell 110, and the floating deck 130 seals the floating power compartment 113. The floating keel 120 is connected to the partition 111 and is located between the floating bottom shell 110 and the floating deck 130, and is used to bear the overall force of the floating module 100.

[0059] A pile guide cylinder 115 is provided on the floating body bottom shell 110, a deck pile guide hole 131 is provided on the floating body deck 130, and a cover plate guide hole 114a is provided on the cover plate 114. The floating body deck 130 and the cover plate 114 pass through the deck pile guide hole 131 respectively. The cover plate guide hole 114a is sleeved on the pile guide cylinder 115. The pile guide cylinder 115 passes through the floating body bottom shell 110. The top end of the pile guide cylinder 115 is sequentially penetrated by the cover plate guide hole 114a. The deck pile guide hole 131 is also located on the floating body deck 130 for allowing the pile leg support module 300 to pass through.

[0060] Furthermore, the side wall of the floating body bottom shell 110 is provided with a plurality of propeller water inlet pipes 116 and propeller water outlet pipes 117 which are connected to the floating body power cabin 113. The floating body power cabin 113 can be used to house propulsion equipment of the control and power module 500. The propulsion equipment is connected to the propeller water inlet pipes 116 and propeller water outlet pipes 117 respectively.

[0061] The propulsion device sucks in seawater through the propeller water inlet pipe 116, and after compression, it is ejected outward through the propeller water outlet pipe 116, thereby achieving thrust to drive the floating body to move on the sea surface.

[0062] Furthermore, a water pump 118 is provided in the pressure water tank 112 , and a water pump inlet and outlet hole 119 communicating with the pressure water tank 112 is provided on the side wall of the floating body bottom shell 110 . The water pump 118 pumps and discharges water from the pressure water tank 112 through the water pump inlet and outlet hole 119 .

[0063] The side wall of the floating deck 130 is provided with a deck fence 132 and a number of floating mooring piles 133 are arranged in sequence and equidistantly along the circumference of the deck fence 132. The top of the floating deck 130 is also provided with a number of maintenance doors 134, which correspond to the pressure tank 112 and the floating power cabin 113 respectively, to form an inspection channel.

[0064] A plurality of level sensors 135 are provided on the top of the pontoon deck 130 for detecting the levelness of the pontoon module 100 .

[0065] Specifically, Figure 2The partition 111 in this example is a rectangular four-sided steel partition, and the rectangular four-sided steel partition is internally connected to the inner wall of the floating bottom shell 110, the cover plate 114 is welded to the rectangular four-sided steel partition to form a rectangular pressurized water tank 112, and the outer side of the rectangular four-sided steel partition and the inner wall of the appendage bottom shell 110 form four fan-shaped floating power cabins 113.

[0066] The structure of the floating module 100 is as described above, and the specific size and cross-sectional size can be designed and adjusted according to the load, dock front and transportation restrictions. The overall shape of the floating body can be disc-shaped or other shapes that are conducive to navigation, and can be adjusted accordingly according to the wind and wave conditions of the sea area.

[0067] Furthermore, the climbing module 200 is disposed on the floating body deck 130 . The climbing module 200 is an electric climbing device, which adopts a scissor-type or curved arm-type lifting method and is welded or bolted to the floating body deck 130 .

[0068] Furthermore, if Figure 6 The lifting and locking module 400 includes an electric-driven climbing module 410 and a locking module 420 .

[0069] The electric-driven climbing module 410 is disposed on the floating body deck 130 and is provided with a through hole 410a corresponding to the pile-driving guide cylinder 115. The through hole 410a allows the pile leg support module 300 to pass through and is coaxially arranged with the pile-driving guide cylinder 115. The electric-driven climbing module 410 has a built-in climbing gear set 411 and a climbing motor and control device 412.

[0070] The climbing gear set 411 is driven by the climbing motor and the control device 412 and is partially exposed in the through hole and meshes with the pile leg support module 300. The climbing gear set 411 drives the floating body module 100 to rise and the pile leg support module 300 to pre-press and recover.

[0071] The locking module 420 is composed of a number of symmetrically placed retractable locking devices, and four are used as examples in this example. The locking device is welded on the electric drive climbing module 410, and there is a reliable structural device, such as a partition rib, corresponding to the placement position thereof to ensure reliable force transmission. The locking device can drive the lock tongue to extend or retract through hydraulic or electric drive, and cooperate with the pile leg support module 300 to achieve vertical fixation of the pile leg support module 300.

[0072] In actual application, when the floating module 100 or the pile leg support module 300 rises or falls to a predetermined position, the locking module 420 is closed, and its locking tongue enters into the pile leg support module 300 to complete the locking and fixing of the floating module 100 or the pile leg support module 200.

[0073] like Figure 3The pile leg supporting module 300 is composed of a steel pipe pile body 310 , a pile leg posture adjustment actuator 320 , and a pile shoe 330 .

[0074] The steel pipe pile body 310 passes through the through hole 410a and the pile sinking guide cylinder 115 in sequence. The steel pipe pile body 310 is provided with a plurality of platform locking holes 311, a platform rising guide rail 312, and a pile body angle sensor 313;

[0075] A plurality of platform locking holes 311 are vertically arranged in sequence to cooperate with the locking module 420 , and the steel pipe pile body 310 is vertically fixed by extending the locking tongue in the locking module 420 and inserting it into the platform locking hole 311 .

[0076] The platform ascending guide rail 312 is meshedly connected with the climbing gear set 411 , the pile body angle sensor 313 is used to monitor the inclination angle of the steel pipe pile body 310 in real time, and the pile shoe 330 is used to contact the seabed.

[0077] like Figure 4 A pile shoe sleeve 330a is provided on the top of the pile shoe 330, the steel pipe pile body 310 is sleeved on the pile shoe sleeve 330a, an actuator fixed support 314 is provided at the bottom of the steel pipe pile body 310, and the pile leg posture adjustment actuator 320 is located in the pile shoe sleeve 330a and one end is fixed to the actuator fixed support 314, and the other end is connected to the top surface of the pile shoe 330.

[0078] The pile leg posture adjustment actuator 320 is preferably a servo hydraulic adjustment device, which can adjust the elongation through the control device, thereby adjusting the elevation of several steel pipe pile bodies 310, combined with several level sensors 135 data, and comprehensively judged to keep the floating module 100 level.

[0079] Furthermore, if Figure 5 The pile shoe 330 is composed of two upper and lower butterfly plates 331 connected together. The two butterfly plates 331 are connected to form a closed space. The pile shoe 330 is provided with a pile shoe inner annular partition 332 inside. The pile shoe inner annular partition 332 separates the closed space.

[0080] The outer side of the pile shoe inner annular partition 332 and the butterfly disk 331 form an outer closed space, and the inner side of the pile shoe inner annular partition 332 and the butterfly disk 331 form an inner closed space. A plurality of pile shoe inner radial partitions 333 are arranged inside the pile shoe 330. The pile shoe inner radial partitions 333 divide the outer closed space into a plurality of outer closed space units, and the pile shoe inner radial partitions 333 divide the inner closed space into a plurality of inner closed space units.

[0081] Among them, a plurality of inner closed space units are provided with a shoe disc central through pipe 336, which penetrates the pile shoe 330 and is used for guiding flow when the pile shoe 330 moves vertically on the seabed.

[0082] A pile shoe flushing water spray pipe 334 is provided in a plurality of outer closed space units, and the pile shoe flushing water spray pipe 334 is arranged through the pile shoe 330; a silt flushing device 335 is provided in the outer closed space unit, and the silt flushing device 335 is connected to the pile shoe flushing water spray pipe 334; the silt flushing device 335 is preferably a high-pressure water spraying device, and the silt flushing device 335 is used to flush silt through the pile shoe flushing water spray pipe 334 when the suction between the pile shoe 330 and the seabed mud is large.

[0083] The structure of the pile leg support module 300 is as described above, and the specific size and cross-sectional size can be designed and adjusted according to the load, sea area address and transportation restrictions. The number of locking holes and the pile body can also be adjusted according to the corresponding conditions of the sea area and the project climbing height.

[0084] When in use, the pile leg support module 300 is lowered to the seabed, and the pile shoe 330 contacts the seabed; when the water pump 118 in the pressure tank 112 injects a proper amount of water into the pressure tank 112, the lifting and locking module 400 is used to pre-compress the pile legs; during pre-compression, the central through pipe 336 of the shoe plate is used for diversion to ensure vertical pre-compression, and the inclination angle of the pile body is monitored in real time through the pile body angle sensor 313.

[0085] After the preloading is completed, the elevation of the leg support modules 300 is adjusted by the leg posture adjustment actuator 320 and the data of the level sensors 135 to keep the upper floating body module 100 level. When the leg support module 300 is pulled out, the built-in mud flushing device 335 is used to flush the mud through the pile shoe flushing water spray pipe 334, and then the leg support module 300 is lifted to the walking elevation by lifting the locking module 400.

[0086] Furthermore, if Figure 7 The control and power module 500 is placed on the floating deck 130, which is the control and power device of the raft-type self-elevating and self-positioning offshore ascending platform. It is mainly composed of a fuel tank 510, a thruster 520, a control cabinet 530, a generator set 540, an energy storage battery 550 and a rudder system 560. The thruster 520 is divided into an in-cabin part and a cabin part. The in-cabin part is arranged in the floating power cabin 113 and is connected to the thruster water inlet pipe 116 and the thruster water outlet pipe 117; the out-cabin part can be arranged on the floating deck 130 for easy control and maintenance;

[0087] The rudder system 560 is arranged at the bottom of the floating module 100, and is used to control the heading of the floating module 100 when it moves. The fuel tank 510 and the energy storage battery 550 are used to provide the required energy for each component in the platform. The generator set 540 can generate electricity and store it in the energy storage battery 550. The control cabinet 530 is used to control the climbing motor and control device 412, the locking module 420 and the thruster 520, thereby controlling the movement of the platform and the vertical movement of the pile leg support module 300.

[0088] The control and power module 500 provides the overall energy, power, positioning, heading, lifting and system control functions for the raft-type self-elevating and self-positioning offshore climbing platform. The specific arrangement quantity and form of the above systems are customized according to different usage conditions, and are integrated and assembled through market procurement or customized finished products.

[0089] The raft-type self-elevating and self-positioning offshore climbing platform formed based on the above scheme is as follows: Figure 8 , this solution also provides the usage method, the usage steps are as follows:

[0090] S1: Use a suitable transport ship to transport the raft-type self-elevating and self-positioning offshore climbing platform to the operating sea area, and hoist it into the water, and move the platform to the predetermined operating position through remote control or driving control and power module 500. According to the operating position, use the anchor boat to tie the cable with one end tied to the floating mooring pile 131, anchor or tie the cable to the surrounding existing engineering structure to stabilize the platform in place;

[0091] S2: remote control or manipulation of the platform to release the locking module 420, so that the pile leg support module 300 slowly descends to the seabed. During this process, the climbing gear set 411 in the electric drive climbing module 410, under the action of the climbing motor, engages the platform ascending guide rail 312 to control the descending speed of the pile leg support module 300;

[0092] S3: After the pile leg support module 300 touches the bottom, the pressure tank 112 is properly filled with water, and the lifting and locking module 400 is used to pre-press the pile legs; during pre-pressing, the central through pipe 336 of the shoe plate is used to guide the flow to ensure vertical pre-pressing, and the pile body angle sensor 313 is used to monitor the pile body inclination in real time, and the locking module 420 is used to fine-tune the pile body angle to ensure that the climbing gear set 411 and the platform rising guide rail 312 are tightly engaged. After the pre-pressing is completed, the pile leg posture adjustment actuator 420 is used to adjust the elevation of several pile leg support modules 300, and combined with the data of several level sensors 135, the floating body module 100 is kept horizontal;

[0093] S4: After confirming that the floating module 100 remains horizontal and the pile leg support module 300 is vertical, the electric drive climbing module 410, driven by the climbing motor and the control device 412, drives the climbing gear set 411 along the platform ascending guide rail 312 to lift the floating module 100 as a whole, and at the same time slowly drains the water tank 112; during the ascent, the pile body angle sensor 313, the horizontal sensor 135 and the overall posture of the platform are monitored. After the floating module 100 rises to a predetermined height, the locking device 420 is closed and it is confirmed that its locking tongue enters the platform locking hole 311, the floating module 100 and the pile leg support module 300 are locked and fixed, and the climbing module 200 is used to perform the climbing operation;

[0094] S5: During disassembly, the climbing module 200 and the floating module 100 are lowered and the water pressure chamber 112 is filled with a proper amount of water in the reverse order, and the pile leg support module 300 is pulled out one by one. During the process, if the suction force of the pile shoe 330 is large, the built-in sludge flushing device 335 can be used to flush the sludge through the pile shoe flushing water spray pipe 334, and then the pile leg support module 300 is lifted to the walking height by lifting the locking module 400, and the platform is moved to the next predetermined working position by remote control or driving the control and power module 500.

[0095] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A raft-type self-elevating and self-positioning offshore climbing platform, characterized in that: It includes a floating module and a climbing module arranged on the floating module, a plurality of pile leg support modules, a plurality of lifting and locking modules, a control and power module, and a sludge flushing device. The floating module can float on the sea surface, and the climbing module can be used for personnel to stand on to perform climbing operations. The plurality of lifting and locking modules are evenly distributed on the floating module, and the plurality of pile leg support modules correspond to the plurality of lifting and locking modules. One end of the pile leg support module passes through the lifting and locking module in sequence, and the floating module is engaged with the lifting and locking module. The lifting and locking module can drive the pile leg support module to move vertically along it, and the pile leg support module can be lowered and fixed to the seabed through the locking module, and the floating module can lift the sea surface to a predetermined wave avoidance height. The sludge flushing device is connected to the bottom of the pile leg support module, and can flush the sludge when the pile leg support module is recovered. The control and power module is used to drive the floating module to move on the sea surface and control the lifting and locking module.

2. The raft-type self-elevating and self-positioning offshore ascending platform according to claim 1 is characterized in that: The floating body module is formed by stacking and connecting the floating body bottom shell, the floating body keel and the floating body deck in sequence; The bottom shell of the floating body is provided with a partition, the partition divides the bottom shell of the floating body, the space inside the partition is a water pressure tank, the space outside the partition is a power cabin of the floating body, the top of the partition is provided with a cover plate, the cover plate seals the water pressure tank, the floating body deck is connected to the top of the bottom shell of the floating body, the floating deck seals the power cabin of the floating body, the floating body keel is connected to the partition plate and is located between the bottom shell of the floating body and the floating deck, and is used to bear the overall force of the floating body module; The bottom shell of the floating body is provided with a pile guide cylinder, the deck of the floating body is provided with a deck pile guide hole, the cover plate is provided with a cover plate guide hole, the floating body deck and the cover plate pass through the deck pile guide hole respectively, the cover plate guide hole is sleeved on the pile guide cylinder, the pile guide cylinder is arranged through the bottom shell of the floating body, the top end of the pile guide cylinder is sequentially penetrated with the cover plate guide hole, and the deck pile guide hole is located on the floating body deck for the pile leg support module to pass through; The side wall of the bottom shell of the floating body is provided with a plurality of propeller water inlet pipes and propeller water outlet pipes connected with the floating body power cabin. The propulsion equipment of the control and power module can be placed in the floating body power cabin. The propulsion equipment is connected with the propeller water inlet pipe and the propeller water outlet pipe respectively. The water pressure tank is provided with a water pump, and the side wall of the bottom shell of the floating body is provided with a water pump inlet and outlet hole connected with the water pressure tank, and the water pump pumps out water from the water pressure tank through the water pump inlet and outlet hole; The side wall of the floating body deck is provided with a deck fence and a plurality of floating mooring piles are arranged in sequence at equal intervals along the circumference of the deck fence. The top of the floating body deck is also provided with a plurality of inspection hatches, which correspond to the pressure tank and the floating body power cabin respectively, to form an inspection channel; A plurality of level sensors are arranged on the top of the floating body deck for detecting the levelness of the floating body module.

3. The raft-type self-elevating and self-positioning offshore ascending platform according to claim 1 is characterized in that: The climbing module is an electric climbing device, which adopts a scissor-type or curved arm-type lifting method.

4. The raft-type self-elevating and self-positioning offshore ascending platform according to claim 1 is characterized in that: The lifting and locking module includes an electric drive climbing module and a locking module. The electric-driven climbing module is arranged on the floating body deck and is provided with a through hole corresponding to the pile sinking guide cylinder, the through hole can be penetrated by the pile leg support module and is arranged coaxially with the pile sinking guide cylinder, the electric-driven climbing module has a built-in climbing gear set, a climbing motor and a control device, The climbing gear set is driven by the climbing motor and the control device and is partially exposed in the through hole and meshes with the pile leg support module. The climbing gear set drives the floating body module to rise and the pile leg support module to pre-press and recover; The locking module is composed of a plurality of symmetrically placed retractable locking devices.

5. The raft-type self-elevating and self-positioning offshore ascending platform according to claim 1 is characterized in that: The pile leg support module is composed of a steel pipe pile body, a pile leg posture adjustment actuator, and a pile shoe; The steel pipe pile body passes through the through hole and the pile sinking guide cylinder in sequence, and the steel pipe pile body is provided with a plurality of platform locking holes, a platform rising guide rail, and a pile body angle sensor; The plurality of platform locking holes are arranged vertically in sequence and are used to cooperate with the locking module. The locking tongue in the locking module extends out and is inserted into the platform locking hole to realize the vertical fixation of the steel pipe pile body. The platform ascending guide rail is meshedly connected with the climbing gear set, the pile body angle sensor is used to monitor the inclination angle of the steel pipe pile body in real time, and the pile shoe is used to contact the seabed; A pile shoe sleeve is provided on the top of the pile shoe, the steel pipe pile body is sleeved on the pile shoe sleeve, an actuator fixed support is provided at the bottom of the steel pipe pile body, the pile leg posture adjustment actuator is located in the pile shoe sleeve and one end is fixed to the actuator fixed support, and the other end is connected to the top surface of the pile shoe.

6. The raft-type self-elevating and self-positioning offshore ascending platform according to claim 5 is characterized in that: The pile shoe is composed of two upper and lower butterfly plates connected by connection, and the two butterfly plates are connected to form a closed space inside. The pile shoe is provided with a pile shoe inner annular partition inside, and the pile shoe inner annular partition divides the closed space. The outer side of the inner annular partition of the pile shoe and the butterfly disk form an outer closed space, and the inner side of the inner annular partition of the pile shoe and the butterfly disk form an inner closed space. A plurality of inner radial partitions of the pile shoe are arranged inside the pile shoe. The inner radial partitions of the pile shoe divide the outer closed space into a plurality of outer closed space units, and the inner radial partitions of the pile shoe divide the inner closed space into a plurality of inner closed space units. The plurality of inner closed space units are all provided with a shoe plate central through pipe, which penetrates through the pile shoe and is used for guiding flow when the pile shoe moves vertically on the seabed. The plurality of outer closed space units are each provided with a pile shoe pile flushing water spray pipe, which penetrates through the pile shoe setting; a sludge flushing device is provided in the outer closed space unit, and the sludge flushing device is connected to the pile shoe pile flushing water spray pipe.

7. The raft-type self-elevating and self-positioning offshore ascending platform according to claim 1 is characterized in that: The control and power module is placed on the floating body deck, and is composed of a fuel tank, a thruster, a control cabinet, a generator set, an energy storage battery and a rudder system. The thruster is divided into an in-cabin part and a cabin part. The in-cabin part is arranged in the floating body power cabin and is connected with the thruster water inlet pipe and the thruster water outlet pipe; the out-cabin part is arranged on the floating body deck.

8. A method for using a raft-type self-elevating and self-positioning offshore climbing platform, characterized in that: include: S1: Use a suitable transport ship to transport the raft-type self-elevating and self-positioning offshore climbing platform to the operating sea area, and hoist it into the water. Move the platform to the predetermined operating position through remote control or driving control and power module. According to the operating position, use the anchor boat to tie the cable with one end tied to the floating mooring pile, drop anchor or tie the cable to the surrounding existing engineering structure to stabilize the platform in place; S2: Remote control or manipulation of the platform releases the locking module, allowing the pile leg support module to slowly descend to the seabed. During this process, the climbing gear set in the electric drive climbing module, under the action of the climbing motor, engages the platform ascending guide rail to control the descending speed of the pile leg support module; S3: After the pile leg support module touches the bottom, the pressure tank is filled with water in an appropriate amount, and the lifting and locking modules are used to pre-press the pile legs. During pre-pressing, the central through pipe of the shoe plate is used to guide the flow to ensure vertical pre-pressing, and the pile body angle sensor is used to monitor the pile body inclination in real time, and the locking module is used to slightly adjust the pile body angle to ensure that the climbing gear set and the platform ascending guide rail are tightly engaged. After the pre-pressing is completed, the pile leg attitude adjustment actuator is used to adjust the elevation of several pile leg support modules, and the floating body module is kept horizontal in combination with several horizontal sensor data; S4: After confirming that the floating module remains horizontal and the pile leg support module is vertical, the electric drive climbing module, driven by the climbing motor and the control device, drives the climbing gear set along the platform ascending guide rail to lift the floating module as a whole, and at the same time slowly drains the water tank; during the ascent, the pile body angle sensor, the horizontal sensor and the overall posture of the platform are monitored. After the floating module rises to a predetermined height, the locking device is closed and its locking tongue is confirmed to enter the platform locking hole, the floating module and the pile leg support module are locked and fixed, and the climbing module is used for climbing operations; S5: During disassembly, the floating module of the climbing module is lowered and the water tank is filled with water in the reverse order, and the pile leg support module is pulled out one by one. If the suction of the pile shoe is large during the process, the built-in silt flushing device can be used to flush the silt through the pile shoe flushing water spray pipe, and then the pile leg support module is lifted to the walking height by lifting the locking module, and the remote control or driving control and power module is used to move the platform to the next predetermined working position.

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