Modular pile leg lengthening device and method of installation

Abstract

The application discloses a modular pile leg lengthening device and a mounting method, and the pile leg lengthening device comprises a movable pile holding assembly, a turnover transmission assembly, a pile leg connecting hoop, a hoisting assembly and a top hoop assembly; the turnover transmission assembly is in transmission connection with the movable pile holding assembly, and drives the movable pile holding assembly to switch between a horizontal state and a vertical state; the hoisting assembly is installed at the top end of the movable pile holding assembly, the hoisting assembly is provided with a steel wire rope with a winding and unwinding function, the top hoop assembly is fixed at the end of the steel wire rope, the lifting adjustment of the top hoop assembly is realized by winding and unwinding of the hoisting assembly, and the pile leg connecting hoop is installed on the top hoop assembly. The length of the pile leg is increased on the basis of the original pile leg by adopting the modular pile leg lengthening device, the lengthening mounting process is convenient, no additional welding is needed, the pile leg lengthening structure is a detachable connecting structure, the adaptability of the pile leg is enhanced, and the modular pile leg lengthening device has potential innovative value in the field of ocean engineering.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of offshore engineering construction, in particular to a modular pile leg lengthening device and installation method. BACKGROUND

[0002] In the offshore engineering platform, the role of the pile leg is to support the offshore engineering platform. With the development of offshore engineering to deeper waters, the original pile leg may not meet the depth requirements of the ocean during use. Currently, when replacing a longer pile leg, the entire pile leg is usually replaced directly. The replacement cost and manufacturing cost of the pile leg are too high, and the process takes longer and is less efficient, which cannot meet the needs of offshore engineering.

[0003] Currently, modular assembly pile leg technology is used to lengthen the pile leg. For example, Chinese Patent Publication (Announcement) No. CN108374401A discloses a wind power installation ship pile leg lengthening device and installation method. By designing a connection and lifting device, the pile leg is lengthened to be suitable for deep sea installation operations. However, during the pile leg lengthening installation process, a lower flange for reinforcement needs to be added to the top of the original pile leg, and an upper flange, a top reinforcing component, etc. need to be added to the bottom of the lengthened pile leg. These components need to be pre-welded to the pile leg, which undoubtedly increases the workload and difficulty of pile leg lengthening, cannot achieve rapid installation, and cannot effectively reduce the construction cost and improve the economy and applicability of the pile leg. SUMMARY

[0004] To overcome the deficiencies of the prior art, one of the purposes of the present application is to provide a modular pile leg lengthening device. The present application uses the modular pile leg lengthening device to increase the length of the pile leg based on the original pile leg. The lengthening installation process is convenient and does not require additional welding. The pile leg lengthening structure is a detachable connection structure, which enhances the adaptability of the pile leg and has potential innovative value in the field of offshore engineering.

[0005] The second purpose of the present application is to provide a modular pile leg lengthening installation method. The modular pile leg lengthening installation method can simplify the assembly process and has certain economic value and practical value in speeding up and increasing the efficiency of the pile leg lengthening project.

[0006] One of the purposes of the present application is achieved by the following technical scheme: a modular pile leg lengthening device, comprising a movable pile holding assembly for placing a pile leg, a turnover transmission assembly for turning over the pile leg placed on the movable pile holding assembly from a horizontal state to a vertical state, a pile leg connecting hoop for fixing the connection positions of two adjacent pile legs to each other, a hoisting assembly for hoisting the pile leg connecting hoop to the connection positions of the two adjacent pile legs, and a top hoop assembly for supporting the pile leg connecting hoop on the inner wall of the two pile leg connection positions.

[0007] The turnover transmission assembly is in transmission connection with the movable pile-holding assembly, and drives the movable pile-holding assembly to switch between the horizontal state and the vertical state; the hoisting assembly is installed at the top end of the movable pile-holding assembly, the hoisting assembly is provided with a steel wire rope with a folding function, the top hoop assembly is fixed at the end of the steel wire rope, the lifting adjustment of the top hoop assembly is realized by folding of the hoisting assembly, and the pile leg connecting hoop is installed on the top hoop assembly;

[0008] When the pile leg is horizontally placed on the movable pile-holding assembly, the turnover transmission assembly lifts the movable pile-holding assembly, the pile leg is turned over from the horizontal state to the vertical state, and is aligned with the pile leg located at the lower section, the hoisting assembly hoists the pile leg connecting hoop from the pile leg to the inner walls of the adjacent two sections of pile legs through the steel wire rope, and the top hoop assembly supports the pile leg connecting hoop on the inner walls of the two sections of pile leg connecting positions.

[0009] Optionally, the movable pile-holding assembly comprises a movable pile-holding frame and a hinged seat; the bottom end of the movable pile-holding frame is hinged to the hinged seat, and the hinged seat is installed on the moon pool periphery of the working platform; the movable pile-holding frame has a first accommodating groove for accommodating the pile leg, and at least one first guide groove is arranged in the first accommodating groove, and a plurality of bearing groups for reducing sliding friction are embedded in the first guide groove.

[0010] Optionally, the turnover transmission assembly comprises a jacking oil cylinder and a horizontal sliding seat, one end of the jacking oil cylinder is hinged to one side of the movable pile-holding assembly, the other end is hinged to the horizontal sliding seat, and the horizontal sliding seat horizontally slides on the offshore working platform.

[0011] Optionally, the pile leg connecting hoop comprises a connecting ring and at least two groups of elastic locking members connected to the outer periphery of the connecting ring; each group of elastic locking members comprises a first elastic locking member and a second elastic locking member symmetrically arranged above and below the first elastic locking member; the first elastic locking member is arranged at the outer periphery of the connecting ring and extends upward along the axial direction of the connecting ring from the outer periphery; the second elastic locking member is arranged at the outer periphery of the connecting ring and extends downward along the axial direction of the connecting ring from the outer periphery; the ends of each first elastic locking member are respectively fixed on the inner side walls of the pile legs located at the upper section, and the ends of each second elastic locking member are respectively fixed on the inner side walls of the pile legs located at the lower section, so as to fixedly connect the adjacent two sections of pile legs to each other.

[0012] Optionally, each of the first elastic locking members comprises a first outwardly inclined portion and a first upright portion; one end of the first outwardly inclined portion is connected with the outer periphery of the connecting ring, and the other end is connected with the first upright portion; a plurality of first fastening holes are formed in the first upright portion; the lower part of the pile leg in the upper section is provided with locking holes matched with the positions of the first fastening holes, and the first upright portion is locked and fixed in the inner wall of the pile leg in the upper section by cooperating with the first fastening holes and the locking holes through fasteners.

[0013] Each of the second elastic locking members comprises a second outwardly inclined portion and a second upright portion; one end of the second outwardly inclined portion is connected with the outer periphery of the connecting ring, and the other end is connected with the second upright portion; a plurality of second fastening holes are formed in the second upright portion; the upper part of the pile leg in the lower section is provided with locking holes matched with the positions of the second fastening holes, and the second upright portion is locked and fixed in the inner wall of the pile leg in the lower section by cooperating with the second fastening holes and the locking holes through fasteners.

[0014] Optionally, the upper part of the pile leg in the lower section is recessed with a limiting groove matched with the shape of the second upright portion, and the second fastening holes are arranged in the limiting groove; the lower part of the pile leg in the upper section is recessed with a limiting groove matched with the shape of the first upright portion, and the first fastening holes are arranged in the limiting groove.

[0015] The outer periphery of the connecting ring is outwardly convex with at least one limiting block, and the inner walls of the pile leg in the upper section and the pile leg in the lower section are recessed with axial guide grooves matched with the shape of the limiting block.

[0016] Optionally, the top clamp assembly comprises a limiting seat for mounting the connecting ring and a telescopic jacking member for jacking the elastic locking members against the inner wall of the pile leg; the connecting ring is detachably mounted on the limiting seat, the telescopic jacking member has a fan-shaped jacking block, and the telescopic jacking member is mounted on the limiting seat; when the telescopic jacking member is horizontally stretched, the fan-shaped jacking block is driven to outwardly expand the elastic locking members, so that each group of elastic locking members is pressed against the inner wall of the pile leg.

[0017] Optionally, the modular pile leg lengthening device further comprises a fixed pile holding assembly arranged on one side of the movable pile holding assembly; the fixed pile holding assembly comprises a fixed pile holding frame and a fixed seat; the bottom end of the fixed pile holding frame is fixed on the fixed seat, and the fixed seat is mounted on the moon pool periphery of the working platform; the fixed pile holding frame has a second accommodating groove for accommodating the pile leg, and at least one second guide groove is arranged in the second accommodating groove, and a plurality of bearing groups for reducing sliding friction are embedded in the second guide groove.

[0018] Optionally, the hoisting assembly further comprises a sling mounting rack and a pulley piece; the sling mounting rack is mounted at the movable end of the movable pile-holding assembly, the pulley piece is mounted on the sling mounting rack, the steel wire rope is wound on the pulley piece, and the top hoop assembly provided with the pile leg connecting hoop is detachably mounted on the steel wire rope.

[0019] The second purpose of the present application is achieved by the following technical scheme: a modular pile leg lengthening installation method, characterized by using the modular pile leg lengthening device as described above to perform lengthening processing on the original pile leg, and specifically comprising the following steps:

[0020] (1) The initial position of the movable pile-holding assembly is in a horizontal state, the pile leg is fixed in the movable pile-holding assembly, and waiting for turning over;

[0021] (2) The pile leg connecting hoop is sleeved on the top hoop assembly, the top hoop assembly provided with the pile leg connecting hoop is fixed on the hoisting assembly through the steel wire rope, the steel wire rope is tightened, and the top hoop assembly is tightened on one side of the pile leg;

[0022] (3) The turning drive assembly jacks up the movable pile-holding assembly, and the movable pile-holding assembly is turned over from the horizontal state to the vertical state, and the pile leg is synchronously turned over from the horizontal state to the vertical state and aligned with the pile leg located in the lower segment;

[0023] (4) The hoisting assembly loosens the steel wire rope, and the top hoop assembly provided with the pile leg connecting hoop is lowered from the pile leg to the connecting position of the adjacent two pile legs;

[0024] (5) The top hoop assembly supports the pile leg connecting hoop on the inner wall of the connecting position of the two pile legs, and the pile leg connecting hoop is fixed on the connecting position of the two pile legs through the fastener, so as to fix the pile leg located in the upper segment on the upper part of the original pile leg, and realize the lengthening of the pile leg.

[0025] Optionally, the modular pile leg lengthening installation method further comprises step (6): continuing to install the extended pile leg on the lengthened pile leg; the specific process is as follows: a lifting device for adjusting the height of the pile leg is arranged on the periphery of the moon pool in advance, the lifting device vertically downwardly conveys the lengthened pile leg in step (5) to a preset height position; steps (1)-(5) are repeatedly continued to turn over and fix another pile leg on the upper part of the pile leg located in the upper segment in step (5), and so on, until the whole pile leg meets the length required by various projects.

[0026] Compared with the prior art, the present application has the following advantages:

[0027] 1. The modular pile leg lengthening device increases the length of the original pile leg, and the lengthening installation process is convenient and does not require additional welding.

[0028] 2. Reduce costs and improve efficiency: By designing an internal pile leg connecting hoop, the need to replace the entire pile leg is avoided, reducing manufacturing and replacement costs, enabling modular pile leg rapid assembly, making the pile leg lengthening process faster and reducing process time.

[0029] 3. Improve connection stability and simplify installation process: By using an internal connecting ring and elastic locking piece, the pile leg connecting structure is hoisted from the pile leg to the desired position during installation, and a horizontal telescopic hydraulic jacking device is used to expand the pile leg connecting structure between the two pile legs, facilitating the connection of the upper and lower parts of the connecting ring structure with the upper and lower pile legs through fasteners, achieving stable connection of the pile leg and reducing the welding workload and difficulty during the pile leg lengthening process.

[0030] 4. Enhance adaptability: The design of the pile leg connecting hoop allows multiple pile legs to be spliced and lengthened into a complete pile leg, which can adapt to different length requirements and improve the adaptability of the pile leg in different ocean depth engineering.

[0031] 5. Easy to maintain: The modular design makes it easier to maintain and replace the pile leg, allowing for quick local repair or replacement without the need to handle the entire pile leg.

[0032] 6. Improve economic efficiency: By reducing overall manufacturing and replacement costs and improving work efficiency, the economic efficiency of the pile leg is improved.

[0033] 7. Strong environmental adaptability: The improved pile leg connecting structure can better adapt to complex marine environments such as deep sea, improving the stability and reliability of the offshore engineering platform.

[0034] 8. Scalability: This technical solution may have good scalability and can be applied to a wider range of offshore engineering projects in the future.

[0035] 9. The modular pile leg lengthening installation method can simplify the assembly process and has certain economic value and practical value in speeding up and increasing the efficiency of pile leg lengthening projects. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The figure shows the state of the modular pile leg lengthening device after two pile legs are lengthened and installed.

[0037] Figure 2Structure diagram of the modular pile leg lengthening device of the preferred embodiment of the present application;

[0038] Figure 3 For Figure 2 Enlarged diagram at A in the middle;

[0039] Figure 4 For Figure 2 Enlarged diagram at B in the middle;

[0040] Figure 5 For Figure 4 Enlarged diagram at C in the middle;

[0041] Figure 6 Structure diagram of the fixed pile holding assembly of the preferred embodiment of the present application;

[0042] Figure 7 Structure diagram of the pile leg connecting hoop of the preferred embodiment of the present application;

[0043] Figure 8 Local structure diagram of the pile leg connecting hoop of the preferred embodiment of the present application;

[0044] Figure 9 Hoisting state diagram of the pile leg connecting hoop and the top hoop assembly of the preferred embodiment of the present application;

[0045] Figure 10 Local disassembly diagram of the pile leg connecting hoop and the two sections of pile legs of the preferred embodiment of the present application;

[0046] Figure 11 Cross-sectional diagram of the pile leg connecting hoop and the two sections of pile legs of the preferred embodiment of the present application after assembly;

[0047] Figure 12 Local disassembly diagram of the pile leg connecting hoop and the top hoop assembly of the preferred embodiment of the present application.

[0048] In the figure:

[0049] 100, modular pile leg lengthening device;

[0050] 1, movable pile holding assembly; 11, movable pile holding frame; 111, first accommodating groove; 112, first guide slot; 113, bearing set; 12, hinged seat;

[0051] 2, turnover transmission assembly; 21, jacking oil cylinder; 22, horizontal sliding seat; 221, pulley set;

[0052] 3. Pile leg connecting hoop; 31. Connecting ring; 311. Limiting block; 32. First elastic locking element; 321. First outwardly inclined part; 322. First upright part; 323. First fastening hole; 33. Second elastic locking element; 331. Second outwardly inclined part; 332. Second upright part; 333. Second fastening hole;

[0053] 4. Lifting components; 41. Lifting gear mounting frame; 42. Pulley components; 43. Wire rope;

[0054] 5. Top hoop assembly; 51. Limiting seat; 511. Fixing seat; 512. Horizontal telescopic support frame; 5121. Annular limiting groove; 513. Mounting bracket; 52. Telescopic tightening component; 521. Fan-shaped tightening block;

[0055] 6. Fixed pile clamping assembly; 61. Fixed pile clamping frame; 611. Second receiving groove; 612. Second guide groove; 613. Bearing assembly; 62. Fixing base;

[0056] 200. Upper leg; 201. Locking hole; 202. Limiting groove; 203. Axial guide groove;

[0057] 300. Lower leg; 301. Locking hole; 302. Limiting groove; 303. Axial guide groove;

[0058] 400. Lifting device. Detailed Implementation

[0059] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0060] like Figures 1-12 As shown, the modular pile leg extension device 100 of the present invention extends the length of the pile leg, such as by increasing the length based on the original pile leg, which can meet the depth requirements of the ocean, fully improve the utilization rate of the original pile leg, eliminate the need to replace the entire pile leg, and reduce the replacement cost of the pile leg; in sea areas of different depths, the pile leg can be modularly assembled according to the different depths of the sea area, reducing the workload and difficulty of extending the pile leg, realizing rapid installation, effectively reducing construction costs, and improving the economy and applicability of the pile leg.

[0061] Specifically, the modular pile leg lengthening device 100 is installed on a sea work platform with a moon pool, and specifically installed on the circumference of the moon pool. The lower section of the pile leg is located in the moon pool of the sea work platform. The newly added pile leg is sequentially turned over, aligned, and fixed on the lower section of the pile leg by using the modular pile leg lengthening device 100. Then, the adjacent two sections of the pile leg are fixed by the built-in pile leg connecting hoop 3 to realize the rapid assembly and lengthening of the upper section of the pile leg and the lower section of the pile leg. The method makes it easy to popularize and apply.

[0062] The modular pile leg lengthening device 100 includes a movable pile holding assembly 1 for placing the pile leg, a turnover transmission assembly 2 for turning over the pile leg placed on the movable pile holding assembly 1 from a horizontal state to a vertical state, a pile leg connecting hoop 3 for fixing the connecting positions of the adjacent two sections of the pile leg to each other, a hoisting assembly 4 for hoisting the pile leg connecting hoop 3 to the connecting positions of the adjacent two sections of the pile leg, and a top hoop assembly 5 for supporting the pile leg connecting hoop 3 on the inner wall of the connecting positions of the two sections of the pile leg.

[0063] The turnover transmission assembly 2 is in transmission connection with the movable pile holding assembly 1 to drive the movable pile holding assembly 1 to switch between the horizontal state and the vertical state. The hoisting assembly 4 is installed at the top end of the movable pile holding assembly 1. The hoisting assembly 4 is provided with a steel wire rope 43 with a folding function. The top hoop assembly 5 is fixed at the end of the steel wire rope 43. The lifting adjustment of the top hoop assembly 5 is realized by folding and unfolding of the hoisting assembly 4. The pile leg connecting hoop 3 is installed on the top hoop assembly 5.

[0064] When the pile leg is horizontally placed on the movable pile holding assembly 1, the turnover transmission assembly 2 lifts the movable pile holding assembly 1 to turn over the pile leg from the horizontal state to the vertical state and align the pile leg with the lower section of the pile leg 300. The hoisting assembly 4 hoists the pile leg connecting hoop 3 from the pile leg to the inner wall of the adjacent two sections of the pile leg through the steel wire rope 43. The top hoop assembly 5 supports the pile leg connecting hoop 3 on the inner wall of the connecting positions of the two sections of the pile leg. At this time, the pile leg connecting hoop 3 is locked on the adjacent pile leg connecting position by fasteners (not shown in the figure).

[0065] As a further preferred scheme, the movable pile holding assembly 1 includes a movable pile holding frame 11 and a hinged seat 12. The bottom end of the movable pile holding frame 11 is hinged on the hinged seat 12. The hinged seat 12 is installed on the circumference of the moon pool of the work platform (not shown in the figure). The movable pile holding frame 11 has a first accommodating groove 111 for accommodating the pile leg. At least one first guide groove 112 is arranged in the first accommodating groove 111. A plurality of bearing groups 113 for reducing sliding friction are embedded in the first guide groove 112.

[0066] The application improves the pile leg overturning stability, facilitates the rapid and accurate positioning after overturning and the positioning between the connecting hoop 3 of the later-stage pile leg and the adjacent two pile legs, specifically by designing the first accommodating groove 111 to facilitate the horizontal positioning of the pile leg, thereby improving the pile leg overturning stability, and the first guide groove 112 is designed to avoid the transmission teeth on the outer surface of the pile leg, which can not only act as a limiting structure to prevent movement during overturning, but also protect the transmission teeth, especially during overturning, reduce the sliding friction between the transmission teeth and the movable pile holder 11, and avoid deformation or wear of the transmission teeth.

[0067] As a further preferred solution, the overturning transmission assembly 2 comprises a jacking oil cylinder 21 and a horizontal sliding seat 22, one end of the jacking oil cylinder 21 is hinged to one side of the movable pile holder assembly 1, the other end is hinged to the horizontal sliding seat 22, and the horizontal sliding seat 22 is horizontally slidable on the offshore operation platform through the pulley set 221 arranged at the bottom thereof.

[0068] As a further preferred solution, the pile leg connecting hoop 3 comprises a connecting ring 31 and at least two groups of elastic locking members connected to the outer periphery of the connecting ring 31; each group of elastic locking members comprises a first elastic locking member 32 and a second elastic locking member 33 symmetrically arranged above and below the first elastic locking member 32; the first elastic locking member 32 is arranged on the outer periphery of the connecting ring 31 and extends upward along the axial direction of the connecting ring 31; the second elastic locking member 33 is arranged on the outer periphery of the connecting ring 31 and extends downward along the axial direction of the connecting ring 31; the ends of each first elastic locking member 32 are fixed to the inner side wall of the upper-stage pile leg 200, and the ends of each second elastic locking member 33 are fixed to the inner side wall of the lower-stage pile leg 300, so as to fixedly connect the adjacent two-stage pile legs.

[0069] The application designs the built-in pile leg connecting hoop 3 as a pile leg connecting structure, avoids replacing the entire pile leg, reduces the manufacturing and replacement costs, realizes the modularized pile leg rapid assembly, makes the pile leg extension process faster, and shortens the process time. Specifically, by designing the first elastic locking member 32 and the second elastic locking member 33 symmetrically arranged above and below, the mold processing cost of the pile leg connecting structure can be reduced and optimized, the assembly process is simplified, and the pile leg extension project is speeded up, which has certain economic value and practical value.

[0070] As a further preferred solution, each of the first elastic locking members 32 comprises a first outwardly inclined portion 321 and a first upright portion 322; one end of the first outwardly inclined portion 321 is connected with the outer periphery of the connecting ring 31, and the other end is connected with the first upright portion 322; a plurality of first fastening holes 323 are formed in the first upright portion 322; the lower part of the upper-section pile leg 200 is provided with locking holes 201 which are adapted in position to the first fastening holes 323, and the first upright portion 322 is locked and fixed in the inner wall of the upper-section pile leg 200 by cooperating with the first fastening holes 323 and the locking holes 201 through fasteners.

[0071] Each of the second elastic locking members 33 comprises a second outwardly inclined portion 331 and a second upright portion 332; one end of the second outwardly inclined portion 331 is connected with the outer periphery of the connecting ring 31, and the other end is connected with the second upright portion 332; a plurality of second fastening holes 333 are formed in the second upright portion 332; the upper part of the lower-section pile leg 300 is provided with locking holes 301 which are adapted in position to the second fastening holes 333, and the second upright portion 332 is locked and fixed in the inner wall of the lower-section pile leg by cooperating with the second fastening holes 333 and the locking holes 301 through fasteners (not shown in the figure).

[0072] Specifically, by means of the built-in connecting ring 31 and elastic locking members, the pile leg connecting structure is hoisted from inside the pile leg to the desired position during installation, the hydraulic tensioning device is used to horizontally expand the pile leg connecting structure (specifically, the first upright portion 322 and the second upright portion 332) between the two sections of pile legs, and the first upright portion 322 and the second upright portion 332 of the connecting ring structure are connected with the pile legs in the upper section and the lower section, respectively, through fasteners, so as to realize stable connection of the pile legs and reduce the welding workload and difficulty during the extension of the pile legs.

[0073] As a further preferred solution, the upper part of the lower-section pile leg 300 is recessed with a limiting recess 302 which is adapted in shape to the second upright portion 332, and the second fastening holes 333 are arranged in the limiting recess 302; the lower part of the upper-section pile leg is recessed with a limiting recess 202 which is adapted in shape to the first upright portion 322, and the first fastening holes 323 are arranged in the limiting recess 202.

[0074] The outer periphery of the connecting ring 31 is outwardly protruded with at least one limiting block 311, and the inner walls of the upper-section pile leg and the lower-section pile leg are recessed with axial guide grooves 203 / 303 which are adapted in shape to the limiting block 311.

[0075] The application designs a limiting block 311 in the pile leg connecting structure, and an axial guide groove is designed on the inner wall of the pile leg, and the two are matched to slide, so that when the pile leg connecting structure is hoisted, the pile leg connecting structure can be lifted up and down along the preset moving track in the pile leg, which is beneficial to the accurate alignment between the locking hole and the first and second fastening holes, realizes the rapid installation of the fastener, and improves the installation efficiency and installation quality.

[0076] As a further preferred scheme, the top hoop assembly 5 comprises a limiting seat 51 for mounting the connecting ring 31 and a telescopic jacking piece 52 for pressing the elastic locking piece against the inner wall of the pile leg; the connecting ring 31 is detachably mounted on the limiting seat 51, and the telescopic jacking piece 52 has a fan-shaped jacking block 521, and the telescopic jacking piece 52 is mounted on the limiting seat 51, and when the telescopic jacking piece 52 makes a horizontal extension movement, the fan-shaped jacking block 521 drives the elastic locking piece to be expanded outward, so that each group of elastic locking pieces is pressed against the inner wall of the pile leg.

[0077] The limiting seat 51 comprises a fixed seat 511, a horizontal telescopic support frame 512 mounted on the fixed seat 511, and mounting frames 513 arranged on the upper and lower parts of the fixed seat 511 for mounting the telescopic jacking piece 52; each mounting frame 513 is provided with a telescopic jacking piece 52; and the horizontal telescopic support frame 512 has a ring-shaped limiting groove 5121 matched with the shape of the connecting ring 31.

[0078] As a further preferred scheme, the modular pile leg lengthening device 100 further comprises a fixed pile holding assembly 6 arranged on one side of the movable pile holding assembly 1, and the fixed pile holding assembly 6 comprises a fixed pile holding frame 61 and a fixed seat 62; the bottom end of the fixed pile holding frame 61 is fixed on the fixed seat 62, and the fixed seat 62 is mounted on the moon pool periphery of the working platform; the fixed pile holding frame 61 has a second accommodating groove 611 for accommodating the pile leg, and at least one second guide groove 612 is arranged in the second accommodating groove 611, and a plurality of bearing groups 613 for reducing sliding friction are embedded in the second guide groove 612.

[0079] As a further preferred scheme, the hoisting assembly 4 comprises a lifting device mounting frame 41, a pulley piece 42, and a steel wire rope 43; the lifting device mounting frame 41 is mounted on the movable end of the movable pile holding assembly 1, the pulley piece 42 is mounted on the lifting device mounting frame 41, the steel wire rope 43 is wound on the pulley piece 42, and the top hoop assembly with a pile leg connecting hoop mounted thereon is detachably mounted on the steel wire rope.

[0080] The application also provides a modular pile leg lengthening installation method, which utilizes the modular pile leg lengthening device 100 as described above to perform lengthening treatment on the original pile leg, and specifically comprises the following steps:

[0081] (1) The initial position of the movable pile holding assembly 1 is in a horizontal state, the pile leg is fixed in the movable pile holding assembly 1, and waiting for overturning; optionally, the pile leg can be fixed on the movable pile holding assembly by a rope.

[0082] (2) The pile leg connecting hoop 3 is sleeved on the top hoop assembly 5, the top hoop assembly 5 provided with the pile leg connecting hoop 3 is fixed on the hoisting assembly 4 through the steel wire rope 43, the steel wire rope 43 is tightened, and the top hoop assembly 5 is tightened on one side of the pile leg;

[0083] (3) The overturning transmission assembly 2 lifts the movable pile holding assembly 1, the movable pile holding assembly 1 is overturned from the horizontal state to the vertical state, and the pile leg is synchronously overturned from the horizontal state to the vertical state and aligned with the pile leg 300 located in the lower section;

[0084] (4) The hoisting assembly 4 loosens the steel wire rope 43, and the top hoop assembly 5 provided with the pile leg connecting hoop 3 is lowered from the pile leg to the connecting position of the adjacent two pile legs;

[0085] (5) The top hoop assembly 5 supports the pile leg connecting hoop 3 on the inner wall of the connecting position of the two pile legs, the pile leg connecting hoop 3 is fixed on the connecting position of the two pile legs through the fastener, so that the pile leg 200 located in the upper section is fixed on the upper part of the original pile leg, and the lengthening of the pile leg is realized.

[0086] (6) The lengthened pile leg is continued to be installed upward; the specific process is as follows: a lifting device 400 for adjusting the height of the pile leg is fixed on the periphery of the moon pool in advance, the lengthened pile leg in step (5) is vertically conveyed downward to a preset height position by the lifting device; steps (1)-(5) are continued to be repeated, so that another pile leg is overturned and fixed on the upper part of the pile leg located in the upper section in step (5), and so on, until the whole pile leg meets the length required by various projects. Optionally, the lifting device can be a self-elevating lifting device, and the lifting of the pile leg is realized by the meshing of the gear on the lifting device and the teeth on the pile leg.

[0087] The modular pile leg lengthening installation method can increase the length of the original pile leg multiple times, can meet the different depth requirements of the sea, fully improves the utilization rate of the original pile leg, does not need to replace the whole pile leg, reduces the replacement cost of the pile leg, can modularly assemble and lengthen the pile leg according to the different depths of the sea area, reduces the workload and difficulty of the lengthening of the pile leg, realizes rapid installation, effectively reduces the construction cost, and improves the economy and applicability of the pile leg.

[0088] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the protection scope of the present application, and any non-essential changes and replacements made by those skilled in the art on the basis of the present application all belong to the protection scope of the present application.

Claims

1. A modular pile leg extension device, characterized in that, It includes a movable pile clamping assembly for placing pile legs, a flipping transmission assembly for flipping the pile legs placed on the movable pile clamping assembly from a horizontal state to a vertical state, a pile leg connecting hoist for fixing the connection points of two adjacent pile legs to each other, a hoisting assembly for hoisting the pile leg connecting hoist to the connection points of two adjacent pile legs, and a top hoisting assembly for supporting the pile leg connecting hoist on the inner wall of the connection points of two pile legs. The flipping transmission assembly is connected to the movable pile-holding assembly, driving the movable pile-holding assembly to switch between horizontal and vertical states; the hoisting assembly is installed on the top of the movable pile-holding assembly, the hoisting assembly is equipped with a steel wire rope with a retracting function, the top hoop assembly is fixed to the end of the steel wire rope, and the hoisting assembly retracts and extends to realize the lifting and lowering adjustment of the top hoop assembly; the pile leg connecting hoop is installed on the top hoop assembly. After the pile leg is placed horizontally on the movable pile clamping assembly, the flipping transmission assembly lifts the movable pile clamping assembly, flipping the pile leg from a horizontal state to a vertical state and aligning it with the pile leg located in the lower section. The hoisting assembly hoists the pile leg connecting hoist from inside the pile leg to the inner wall of the two adjacent pile leg sections through steel wire ropes. The top hoisting assembly supports the pile leg connecting hoist on the inner wall of the connection position of the two pile leg sections. The pile leg connecting hoop includes a connecting ring and at least two sets of elastic locking members connected to the outer periphery of the connecting ring. Each set of elastic locking members includes a first elastic locking member and a second elastic locking member symmetrically arranged vertically with respect to the first elastic locking member. The first elastic locking member is disposed on the outer periphery of the connecting ring and extends upwardly along the axial direction of the connecting ring from the outer periphery. The second elastic locking member is disposed on the outer periphery of the connecting ring and extends downwardly along the axial direction of the connecting ring from the outer periphery. The ends of each first elastic locking member are fixed to the inner wall of the upper pile leg, and the ends of each second elastic locking member are fixed to the inner wall of the lower pile leg, so as to fix and connect adjacent pile leg sections to each other. Each of the first elastic locking components includes a first outwardly inclined portion and a first upright portion; one end of the first outwardly inclined portion is connected to the outer periphery of the connecting ring, and the other end is connected to the first upright portion; a plurality of first fastening holes are provided on the first upright portion; the lower part of the pile leg located in the upper section is provided with a locking hole that matches the position of the first fastening holes, and the first upright portion is locked and fixed to the inner wall of the pile leg located in the upper section by fasteners cooperating with the first fastening holes and the locking holes; Each of the second elastic locking components includes a second outwardly inclined portion and a second upright portion; one end of the second outwardly inclined portion is connected to the outer periphery of the connecting ring, and the other end is connected to the second upright portion; a plurality of second fastening holes are provided on the second upright portion; the pile leg located in the lower section has a locking hole on its upper part that matches the position of the second fastening holes, and the second upright portion is locked and fixed to the inner wall of the pile leg located in the lower section by fasteners cooperating with the second fastening holes and the locking holes; The top clamp assembly includes a limiting seat for mounting the connecting ring and a telescopic tightening member for pressing the elastic locking member against the inner wall of the pile leg; the connecting ring is detachably mounted on the limiting seat, and the telescopic tightening member has a fan-shaped tightening block. The telescopic tightening member is mounted on the limiting seat. When the telescopic tightening member performs a horizontal extension movement, it drives the fan-shaped tightening block to push the elastic locking member outward, so that each set of elastic locking members presses against the inner wall of the pile leg.

2. The modular pile leg extension device as described in claim 1, characterized in that, The movable pile-holding assembly includes a movable pile-holding frame and a hinged seat; the bottom end of the movable pile-holding frame is hinged to the hinged seat, and the hinged seat is installed on the periphery of the moon pool of the working platform; the movable pile-holding frame has a first receiving groove for accommodating the pile leg, and at least one first guide groove is provided in the first receiving groove, and multiple bearing assemblies for reducing sliding friction are embedded in the first guide groove.

3. The modular pile leg extension device as described in claim 1, characterized in that, The overturning transmission assembly includes a lifting cylinder and a horizontal slide. One end of the lifting cylinder is hinged to one side of the movable pile-holding assembly, and the other end is hinged to the horizontal slide. The horizontal slide slides horizontally on the offshore operating platform.

4. The modular pile leg extension device as described in claim 1, characterized in that, The lower section of the pile leg has a limiting groove on its upper part that matches the shape of the second upright part, and the second fastening hole is disposed in the limiting groove; the upper section of the pile leg has a limiting groove on its lower part that matches the shape of the first upright part, and the first fastening hole is disposed in the limiting groove. At least one limiting block is provided on the outer periphery of the connecting ring, and the inner walls of the upper and lower pile legs are recessed with axial guide grooves that are adapted to the shape of the limiting block.

5. The modular pile leg extension device as described in claim 1, characterized in that, The modular pile leg extension device also includes a fixed pile gripping assembly disposed on one side of the movable pile gripping assembly. The fixed pile gripping assembly includes a fixed pile gripping frame and a fixed base. The bottom end of the fixed pile gripping frame is fixed on the fixed base, and the fixed base is installed on the periphery of the moon pool of the working platform. The fixed pile gripping frame has a second receiving groove for accommodating the pile leg. The second receiving groove is provided with at least one second guide groove, and multiple bearing assemblies for reducing sliding friction are embedded in the second guide groove.

6. The modular pile leg extension device as described in claim 1, characterized in that, The hoisting assembly also includes a hoisting tool mounting frame and a pulley assembly; the hoisting tool mounting frame is installed on the movable end of the movable pile clamping assembly, the pulley assembly is installed on the hoisting tool mounting frame, the wire rope is wound around the pulley assembly, and the top hoop assembly with pile leg connecting hoops is detachably installed on the wire rope.

7. A modular pile leg extension installation method, characterized in that, The modular pile leg extension device as described in any one of claims 1-6 is used to extend the original pile leg, specifically including the following steps: (1) The initial position of the movable pile clamping assembly is horizontal. The pile leg is fixed in the movable pile clamping assembly and waits for it to be flipped. (2) Fit the pile leg connecting hoop onto the top hoop assembly, fix the top hoop assembly with the pile leg connecting hoop onto the hoisting assembly with a wire rope, tighten the wire rope, and tighten the top hoop assembly to one side of the pile leg; (3) The flip transmission assembly lifts up the movable pile clamping assembly, flips the movable pile clamping assembly from the horizontal state to the vertical state, and the pile leg flips from the horizontal state to the vertical state simultaneously and aligns with the pile leg located in the lower section. (4) The hoisting assembly loosens the wire rope and lowers the top hoop assembly with the pile leg connecting hoop from inside the pile leg to the connection point of the two adjacent pile legs; (5) The top hoop assembly supports the pile leg connecting hoop on the inner wall of the two pile leg connection positions, and fixes the pile leg connecting hoop on the two pile leg connection positions by fasteners, thereby fixing the pile leg located in the upper section to the upper part of the original pile leg, thus realizing the extension of the pile leg.

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