Offshore pile leg auxiliary sliding device

Abstract

The invention relates to the technical field of ocean engineering, and discloses an offshore pile leg auxiliary sliding device which comprises a hoop assembly, a moving assembly, a connecting assembly and a clamping assembly, the hoop assembly comprises two arc-shaped hoops, the two arc-shaped hoops are arranged on a pile leg in a hooping mode, and mounting bases are arranged on the arc-shaped hoops; the moving assembly comprises an inhaul cable and a sliding assisting mechanism, one end of the inhaul cable is connected with the top of the hoop assembly, the other end of the inhaul cable is connected with the lifting device, and the sliding assisting mechanism is arranged on the arc-shaped hoop and comprises a driving component and a sliding component; the connecting assembly comprises an elastic tensioning mechanism and a diameter adjusting mechanism, the first connecting ends of the two arc-shaped hoops are connected through the elastic tensioning mechanism, and the second connecting ends of the two arc-shaped hoops are connected through the diameter adjusting mechanism; the clamping assembly comprises two sets of clamping mechanisms, the two sets of clamping mechanisms are arranged on the two arc-shaped hoops correspondingly, lifting movement can be conducted on the pile leg with the diameter changing, and the device applicability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of marine engineering, and in particular to an offshore pile leg attached sliding device. Background Art

[0002] With the continued development of marine resources, the number of offshore structures, including offshore wind turbines, offshore oil and gas platforms, marine research stations, and floating platforms, is increasing. These structures are constantly exposed to the complex and ever-changing marine environment. To ensure their long-term safe operation under diverse marine conditions, such as wind, waves, and currents, pile foundations are typically used to securely anchor them to the seabed. Pile foundations provide stable support for offshore structures and are a key component in maintaining their overall structural safety.

[0003] In order to ensure the stability of the pile foundation structure and the surrounding seabed area, and to regularly monitor and maintain the marine attachments, bioerosion, and geological changes at the bottom of the pile foundation, corresponding underwater working devices are required for operation. However, the existing underwater working devices are generally unable to adjust the launching depth, and there is an urgent need for a mobile device that can adjust the launching depth of the underwater working device. The prior art proposes a mobile device for the pile legs of an offshore platform, including: a lifting plate and an electric telescopic column, the underwater working device is arranged on the lifting plate, the electric telescopic column is fixed under the offshore platform, the lifting plate is sleeved on the pile foundation, the electric telescopic column is connected to the lifting plate, and the lifting plate is driven to rise and fall along the height direction of the pile foundation, so as to realize the operation of the underwater working device at different heights of the pile legs. However, this mobile device can only be installed on pile legs with fixed diameters for lifting and moving, and cannot be installed on pile legs with varying diameters, and the device has poor applicability. Summary of the Invention

[0004] In view of this, the present invention provides an offshore pile leg attached sliding device to solve the problem that the existing moving device cannot be lifted and moved on the pile leg with a variable diameter and the device has poor applicability.

[0005] In a first aspect, the present invention provides an offshore pile leg attached sliding device, comprising:

[0006] A clamp assembly, the clamp assembly comprising two arc-shaped clamps, the two arc-shaped clamps being arranged on the pile legs, and the arc-shaped clamps being provided with mounting bases, the mounting bases being suitable for mounting underwater working devices;

[0007] Moving component, the moving component includes: a cable and a sliding assistance mechanism. One end of the cable is connected to the top of the hoop component, and the other end is connected to a lifting device. The sliding assistance mechanism is arranged on the arc-shaped hoop, and it includes: a driving member and a sliding member. The sliding assistance mechanism has a sliding assistance state in which the driving member drives the sliding member to extend out of the inner side of the arc-shaped hoop and slide in contact with the pile leg, and a retraction state in which the driving member drives the sliding member to retract into the arc-shaped hoop.

[0008] Connection component, the connection component includes: an elastic tensioning mechanism and a diameter adjustment mechanism. The first connection ends of the two arc-shaped hoops are connected through the elastic tensioning mechanism, and the second connection ends of the two arc-shaped hoops are connected through the diameter adjustment mechanism. The diameter adjustment mechanism has an unlocking state in which the cable provides driving force to the hoop component to drive it to slide up and down along the pile leg, and a locking state in which the position of the hoop component is locked.

[0009] Clamping component, the clamping component includes two sets of clamping mechanisms. The two sets of clamping mechanisms are respectively arranged on the two arc-shaped hoops. The clamping component has a clamping state in which the two sets of clamping mechanisms clamp the outer wall of the pile leg and a separation state in which the two sets of clamping mechanisms are separated from the outer wall of the pile leg.

[0010] Beneficial effects

[0011] The hoop component can adapt to pile legs of different diameters and is flexible to install; the sliding assistance mechanism controls the contact or separation between the sliding member and the pile leg through the driving member, reducing the frictional resistance and improving the smoothness and reliability of the sliding process while the hoop component slides; the connection component uses an elastic tensioning mechanism and a diameter adjustment mechanism in cooperation, and can adapt to the diameter change of the pile leg during the movement of the hoop component; the clamping component ensures that the sliding device can be stably clamped after the sliding ends, preventing the sliding device from shifting in position. The sliding device can adapt to pile legs with diameter changes, significantly improving the operation efficiency and safety of the underwater operation device.

[0012] In an optional embodiment, the diameter adjustment mechanism includes: a connecting rod, a gear nut, a first driving gear, and a first driving motor. A connection hole is opened at the second connection end of the arc-shaped hoop. The connecting rod passes through the connection holes on the two arc-shaped hoops, and one end of the connecting rod is a threaded end. The gear nut is arranged on the threaded end. The first driving motor is arranged on any one of the arc-shaped hoops. The first driving gear is arranged on the driving end of the first driving motor and is in tooth engagement with the gear nut.

[0013] Beneficial effects

[0014] The first driving motor drives the first power gear to rotate, which in turn drives the engaged gear nut to rotate, causing it to move on the threaded section of the connecting rod, changing the relative positions of the two arc-shaped clamps, thereby adjusting the diameter of the entire clamp assembly, enabling the clamp assembly to quickly adapt to changes in the pile leg diameter, and enhancing the versatility and installation flexibility of the sliding device.

[0015] In an alternative embodiment, the elastic tensioning mechanism includes a plurality of elastic members spaced along the axial direction of the pile leg, and two ends of each elastic member are respectively connected to the first ends of the two arc-shaped clamps.

[0016] Beneficial effects

[0017] The elastic members enable a certain elastic tension to be always maintained between the two arc-shaped clamps, enabling the clamp assembly to adaptively fit the surface shape of the pile leg when installed on the outer wall of the pile leg, and at the same time preventing the two arc-shaped clamps from being too loose, enhancing the fitting stability between the sliding device and the pile leg surface.

[0018] In an alternative embodiment, the elastic tensioning mechanism further includes a plurality of mounting grooves formed on the first ends of the arc-shaped clamps, the plurality of mounting grooves are spaced along the axial direction of the pile leg, and the mounting grooves on the two arc-shaped clamps correspond to each other, and two ends of each elastic member are respectively connected to the wall surfaces of the mounting grooves.

[0019] In an alternative embodiment, the sliding member includes a plurality of balls, the arc-shaped clamps are provided with multiple groups of grooves spaced along the axial direction of the pile leg, each group of grooves includes a plurality of ball grooves spaced along the circumferential direction of the arc-shaped clamp, and the balls are arranged in the ball grooves.

[0020] Beneficial effects

[0021] The rolling contact between the balls and the pile leg significantly reduces the frictional resistance between the clamp assembly and the pile leg, enhances the sliding efficiency of the sliding device, and reduces the energy consumption of the cable. At the same time, the arrangement of the balls in multi-point contact with the pile leg can prevent local wear or jamming of the balls, enhancing the stability of the sliding process of the sliding device.

[0022] In an alternative embodiment, the driving member includes: a second driving motor and a push plate, the push plate is axially inserted into the ball groove along the pile leg, a rack is provided on the side of the push plate away from the pile leg, the second driving motor is arranged on the top of the arc-shaped clamp, and its driving end is connected to a second power gear, and the rack is in tooth engagement with the second power gear.

[0023] Beneficial effects

[0024] The second drive motor drives the gear to rotate, which can control the pushing plate to extend or insert into the ball groove, thereby controlling the extension or retraction state of the balls in the groove, achieving rapid contact or detachment between the balls and the pile leg, and enhancing the sliding flexibility and operability of the sliding member.

[0025] In an alternative embodiment, the depth of the ball groove is greater than the diameter of the ball and less than the sum of the diameter of the ball and the thickness of the baffle.

[0026] In an alternative embodiment, the clamping mechanism includes: a telescopic rod, a connecting plate, a fixed rod, and a rubber pad. The telescopic rod is disposed on the side wall of the arc-shaped hoop, and its driving end is connected to the connecting plate. The fixed rod is slidably disposed on the arc-shaped hoop, and one end is connected to the connecting plate and the other end is connected to the rubber pad.

[0027] Advantageous Effects

[0028] The rubber pad can provide flexible buffering and friction when contacting the pile leg, effectively preventing hard damage to the surface of the pile leg; the telescopic rod drives the rubber pad to move, and can flexibly control the clamping and release of the rubber pad and the pile leg. The rubber pad can not only ensure the stability during clamping, prevent the sliding device from displacing during the operation with the underwater operation device, but also has good buffering and shock absorption effects, improving the clamping compliance and adaptability of the clamping mechanism.

[0029] In an alternative embodiment, the side of the rubber pad facing the pile leg is an arc surface.

[0030] In an alternative embodiment, mounting screw holes are provided on the mounting base, and the underwater operation device is mounted on the mounting base through the mounting screw holes. Description of the Drawings

[0031] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0032] Figure 1 It is a front view of an offshore pile leg attached sliding device according to an embodiment of the present invention;

[0033] Figure 2 It is a rear view of an offshore pile leg attached sliding device according to an embodiment of the present invention;

[0034] Figure 3 For Figure 1 the sectional top view of A-A in

[0035] Figure 4 For Figure 1 The top view of the cross-section of B-B in

[0036] Explanation of reference numerals in the drawings:

[0037] 11. Arc-shaped hoop;

[0038] 2. Pile leg;

[0039] 3. Installation base, 31. Installation screw hole;

[0040] 4. Underwater operation device;

[0041] 51. Cable, 52. Sliding assistance mechanism, 521. Driving member, 5211. Second driving motor, 5212. Pushing plate, 5213. Second power gear, 522. Sliding member, 5221. Ball, 5222. Ball groove,

[0042] 61. Elastic tensioning mechanism, 611. Elastic member, 612. Installation groove, 62. Diameter adjustment mechanism, 621. Connecting rod, 622. Gear nut, 623. First power gear, 624. First driving motor;

[0043] 71. Clamping mechanism, 711. Rubber pad, 712. Telescopic rod, 713. Connecting plate, 714. Fixed rod. Detailed implementation manners

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] Next, in combination with Figures 1 to 4 , the embodiments of the present invention will be described.

[0046] According to an embodiment of the present invention, on the one hand, a sliding device attached to a marine pile leg is provided, including: a hoop assembly, a moving assembly, a connecting assembly, and a clamping assembly. The hoop assembly includes two arc-shaped hoops 11, the two arc-shaped hoops 11 are clamped on the pile leg 2, and an installation base 3 is provided on the arc-shaped hoop 11, and an underwater operation device 4 is suitable for being installed on the installation base 3;

[0047] The moving component includes: a cable 51 and a sliding assistance mechanism 52. One end of the cable 51 is connected to the top of the hoop component, and the other end is connected to the lifting device. The sliding assistance mechanism 52 is arranged on the arc-shaped hoop 11 and includes: a driving member 521 and a sliding member 522. The sliding assistance mechanism 52 has a sliding assistance state in which the driving member 521 drives the sliding member 522 to extend out of the inner side of the arc-shaped hoop 11 and make sliding contact with the pile leg 2, and a retracting state in which the driving member 521 drives the sliding member 522 to retract into the arc-shaped hoop 11;

[0048] The connecting component includes: an elastic tensioning mechanism 61 and a diameter adjusting mechanism 62. The first connecting ends of the two arc-shaped hoops 11 are connected by the elastic tensioning mechanism 61, and the second connecting ends of the two arc-shaped hoops 11 are connected by the diameter adjusting mechanism 62. The diameter adjusting mechanism 62 has an unlocking state in which a driving force is provided through the cable 51 to drive the hoop component to slide up and down along the pile leg 2, and a locking state in which the position of the hoop component is locked;

[0049] The clamping component includes two groups of clamping mechanisms 71. The two groups of clamping mechanisms 71 are respectively arranged on the two arc-shaped hoops 11. The clamping component has a clamping state in which the two groups of clamping mechanisms 71 clamp the outer wall of the pile leg 2 and a separating state in which the two groups of clamping mechanisms 71 are separated from the outer wall of the pile leg 2.

[0050] Specifically, the hoop component includes two arc-shaped hoops 11. The arc-shaped hoop 11 is composed of a circular arc plate and wing plates extending from both ends of the circular arc plate. The two arc-shaped hoops 11 use their circular arc plates to cover the outer peripheral surface of the offshore pile leg 2. The two wing plates are the first connecting end and the second connecting end of the arc-shaped hoop 11. An installation seat is connected to the outer wall at the bottom of the arc-shaped hoop 11, and an underwater operation device 4 can be installed on the installation seat.

[0051] The first connecting ends of the two arc-shaped hoops 11 are connected by the elastic tensioning mechanism 61, which provides an elastic clamping force for the arc-shaped hoops 11 and compensates for the slight change in the diameter of the pile leg 2 when the arc-shaped hoops 11 slide, enhancing the fit of the sliding assistance mechanism 52 to the surface of the pile leg 2. The second connecting ends of the two arc-shaped hoops 11 are connected by the diameter adjusting mechanism 62. The diameter adjusting mechanism 62 has two working states: one is the unlocking state, in which a driving force is applied through the cable 51 to drive the hoop component to slide up and down along the pile leg 2. Combined with the elastic tensioning mechanism 61, it can adapt to the diameter change of the pile leg 2 during the movement of the arc-shaped hoops 11. The other is the locking state, that is, locking the two arc-shaped hoops 11 on the pile leg 2 to facilitate the underwater operation device 4 to carry out work. When it is necessary to lock the position of the arc-shaped hoops 11, the clamping mechanism 71 can form a stable clamp with the outer wall of the pile leg 2 to prevent the hoop component from sliding or shaking.

[0052] One end of the cable 51 is fixed to the top of an arc-shaped clamp 11, and the other end is connected to a lifting device at the top of the offshore platform through pulley guidance. In the sliding assistance mechanism 52, the sliding member 522 is embedded in the inner surface of the arc-shaped clamp 11, and the driving member 521 can control the sliding contact state between the sliding member 522 and the pile leg 2. When the sliding member 522 contacts the surface of the pile leg 2 and forms a sliding support, the arc-shaped clamp 11 can reduce the sliding resistance of the sliding device through the sliding member 522, facilitating sliding on the pile leg 2; when the sliding member 522 releases the sliding contact state with the surface of the pile leg 2, the inner wall of the arc-shaped clamp 11 fits the surface of the pile leg 2, facilitating the clamping and locking of the arc-shaped clamp 11.

[0053] The setting of the connection component enables the clamp component to adapt to pile legs 2 with different diameters, can adapt to the diameter change of the pile legs 2, and improves the applicable range of the sliding device. The sliding assistance mechanism 52 can switch between the sliding assistance state and the retraction state at any time, can reduce the friction during the sliding process of the arc-shaped clamp 11, and can also completely retract when the arc-shaped clamp 11 is fixed on the pile leg 2, which not only ensures the sliding efficiency of the clamp component but also does not affect the clamping operation of the clamp component. The clamping component can achieve the stable clamping of the outer wall of the pile leg 2 by the clamp component, enhances the positioning stability of the sliding device, prevents displacement under external disturbances such as ocean currents, and ensures the safety of the underwater operation device 4 during operation.

[0054] In one embodiment, the diameter adjustment mechanism 62 includes: a connecting rod 621, a gear nut 622, a first driving gear 623, and a first driving motor 624. A connection hole is opened at the second connection end of the arc-shaped clamp 11. The connecting rod 621 passes through the connection holes on the two arc-shaped clamps 11, and one end of the connecting rod 621 is a threaded end. The gear nut 622 is arranged at the threaded end. The first driving motor 624 is arranged on any one of the arc-shaped clamps 11, and the first driving gear 623 is arranged at the driving end of the first driving motor 624 and is in tooth connection with the gear nut 622.

[0055] Specifically, through holes are opened at the second connection ends of the two arc-shaped clamps 11. The connecting rod 621 passes through the through holes and connects the two clamps. One end of the connecting rod 621 has an external thread structure, and the gear nut 622 is screwed thereon, enabling it to move axially along the screw during rotation. The first driving motor 624 is installed on the arc-shaped clamp 11, and its driving end is connected with the first driving gear 623. The first driving gear 623 meshes with the gear nut 622. By controlling the motor to start, the first driving gear 623 drives the gear nut 622 to rotate, and the gear nut 622 moves axially on the connecting rod 621 to adjust the distance between the two arc-shaped clamps 11, realizing the adjustment of the diameter of the clamp component.

[0056] When it is necessary to lift and move the clamp assembly, control the first drive motor 624 to rotate the gear nut 622 and increase the distance between the two arc-shaped clamps 11, facilitating the sliding and positioning of the sliding device on the pile leg 2; when the target position is reached, control the motor to reverse, tighten the connecting rod 621 by the gear nut 622, and press the two arc-shaped clamps 11 against the surface of the pile leg 2 to enter the locked state, achieving effective fixation of the sliding device.

[0057] In one embodiment, the elastic tension mechanism 61 includes a plurality of elastic members 611 arranged at intervals along the axial direction of the pile leg 2, and both ends of the elastic member 611 are respectively connected to the first ends of the two arc-shaped clamps 11.

[0058] Specifically, the elastic member 611 is a spiral tension spring or a corrugated spring, and both ends thereof are respectively fixed to the first ends of the two arc-shaped clamps 11. The elastic member 611 is always in a certain stretched state, providing continuous tension between the two arc-shaped clamps 11, enabling a tightening tendency to form when the clamp assembly is installed on the outer periphery of the pile leg 2, and achieving preliminary automatic fitting.

[0059] Meanwhile, when the sliding device slides up and down, the elastic member 611 can also buffer the change in the distance between the arc-shaped clamps 11, preventing the arc-shaped clamps 11 from loosening or being unevenly pressed.

[0060] In one embodiment, the elastic tension mechanism 61 further includes a plurality of mounting grooves 612 formed on the first ends of the arc-shaped clamps 11, the plurality of mounting grooves 612 are arranged at intervals along the axial direction of the pile leg 2, and the mounting grooves 612 on the two arc-shaped clamps 11 correspond to each other, and both ends of the elastic member 611 are respectively connected to the wall surfaces of the mounting grooves 612.

[0061] Specifically, the plurality of mounting grooves 612 are arranged at equal intervals along the axial direction of the pile leg 2 on the opposite end surfaces of the two clamps, the mounting grooves 612 are rectangular or semi-circular grooves, the groove depth and groove width match the installation requirements of the elastic member 611, and both ends of the plurality of elastic members 611 are respectively embedded in the corresponding two mounting grooves 612.

[0062] During the assembly process of the elastic member 611, one end of the elastic member 611 can be first fixed in a certain mounting groove 612 of one arc-shaped clamp 11, and then the other end can be fixed in the corresponding mounting groove 612 of the other arc-shaped clamp 11 by stretching.

[0063] Optionally, the end of the elastic member 611 can be provided with a connecting hook or a limiting snap ring, which can be engaged with the preset holes or limiting structures in the mounting groove 612 to ensure firm and reliable connection.

[0064] In one embodiment, the sliding member 522 includes a plurality of balls 5221 , and the arc-shaped clamp 11 is provided with a plurality of groups of grooves at intervals along the axial direction of the pile leg 2 , each group of grooves includes a plurality of ball grooves 5222 arranged at intervals along the circumferential direction of the arc-shaped clamp 11 , and the balls 5221 are arranged in the ball grooves 5222 .

[0065] Specifically, ball 5221 is made of high-strength stainless steel, offering excellent corrosion resistance and pressure resistance, suitable for long-term use in marine environments. The ball groove 5222 mates with the spherical surface of ball 5221, ensuring that ball 5221 is stably positioned within the groove and has sufficient room for movement. As the sliding device slides, ball 5221 extends beyond the inner surface of the arc-shaped clamp 11 and forms rolling contact with the surface of the pile leg 2. This point contact significantly reduces friction, enabling the sliding device to slide smoothly along the axial direction of the pile leg 2.

[0066] In one embodiment, the driving component 521 includes: a second driving motor 5211 and a pushing plate 5212, the pushing plate 5212 is inserted into the ball groove 5222 along the axial direction of the pile leg 2, and a rack is provided on the side of the pushing plate 5212 away from the pile leg 2. The second driving motor 5211 is provided at the top of the arc-shaped clamp 11, and its driving end is connected to the second power gear 5213, and the rack is gear-connected with the second power gear 5213.

[0067] The second drive motor 5211 is mounted on the top surface of the curved hoop 11, with a second power gear 5213 connected to its drive end. The second power gear 5213 meshes with the rack on the push plate 5212. By controlling the forward and reverse rotation of the drive motor, the push plate 5212 can be driven to slide in or out of the curved hoop 11. When the push plate 5212 slides into the curved hoop 11, it pushes out the balls 5221, causing them to partially extend from the ball grooves 5222 and contact the surface of the leg 2, creating a sliding-assisted state. When the push plate 5212 slides out of the curved hoop 11, the balls 5221 fall back into the grooves under the pressure of the leg 2, releasing the sliding-assisted state with the leg 2.

[0068] In one embodiment, the depth of the ball groove 5222 is greater than the diameter of the ball 5221 and less than the sum of the diameter of the ball 5221 and the thickness of the baffle.

[0069] Specifically, when the pushing plate 5212 is not inserted into the arc-shaped clamp 11, the ball 5221 will not be exposed from the inner side of the clamp in the ball groove 5222, and will not contact the pile leg 2, thereby avoiding unnecessary friction in the non-sliding state; and when the pushing plate 5212 is inserted into the arc-shaped clamp 11, the ball 5221 will extend out and form rolling contact with the outer wall of the pile leg 2, providing a sliding aid for the sliding device.

[0070] In one embodiment, the clamping mechanism 71 includes: a telescopic rod 712, a connecting plate 713, a fixed rod 714, and a rubber pad 711. The telescopic rod 712 is disposed on the side wall of the arc-shaped hoop 11, and its driving end is connected to the connecting plate 713. The fixed rod 714 is slidably disposed on the arc-shaped hoop 11, and one end thereof is connected to the connecting plate 713, and the other end is connected to the rubber pad 711.

[0071] Specifically, the rubber pad 711 is made of elastic rubber resistant to seawater corrosion. One end of the rubber pad 711 away from the pile leg 2 is connected to one end of the fixed rod 714, the other end of the fixed rod 714 is connected to the connecting plate 713, the connecting plate 713 is connected to the driving end of the telescopic rod 712 fixed at the first connection end of the arc-shaped hoop 11, and the telescopic rod 712 is driven by a hydraulic cylinder.

[0072] When the telescopic rod 712 extends, the connecting plate 713 moves outward accordingly, driving the rubber pad 711 away from the pile leg 2 through the fixed rod 714, so that it disengages from the surface of the pile leg 2 and enters the separated state; when the telescopic rod 712 retracts, the connecting plate 713 contracts inward, and the fixed rod 714 then pulls the rubber pad 711 to move towards the pile leg 2, so that the rubber pad 711 presses against the outer wall of the pile leg 2 to achieve the clamping function.

[0073] In one embodiment, the side of the rubber pad 711 facing the pile leg 2 is an arc surface.

[0074] Specifically, the side of the rubber pad 711 facing the pile leg 2 is processed into an arc surface structure, and its curvature matches the arc shape of the outer wall of the pile leg 2. The arc surface can achieve surface contact with the outer wall of the pile leg 2, thereby increasing the contact area, improving the clamping stability and friction of the rubber pad 711, and preventing the sliding device from slipping due to waves and fluid disturbances in the underwater environment.

[0075] In one embodiment, mounting screw holes 31 are provided on the mounting base 3, and the underwater operation device 4 is mounted on the mounting base 3 through the mounting screw holes 31.

[0076] Specifically, the mounting base 3 is a rectangular steel plate structure, fixedly welded or bolted to the outer surface of the bottoms of the two arc-shaped hoops 11. Its surface is evenly provided with a number of threaded holes, and the hole diameter and distribution pitch are arranged according to the installation hole positions of standard underwater operation equipment. During the installation of the underwater operation device 4, anti-corrosion screws are used to fix the underwater operation device 4 on the mounting base 3 to ensure firm connection and quick disassembly and maintenance.

[0077] Optionally, all the mounting screw holes 31 are coated with a waterproof coating or provided with sealing rings to improve the anti-corrosion performance in the long-term marine environment.

[0078] Usage process:

[0079] Install the sliding device outside the leg 2. First, according to the diameter of the leg 2, surround the outer periphery of the leg 2 with two arc-shaped hoops 11, achieve preliminary fitting through the elastic tension mechanism 61, then adjust to the appropriate tightening state through the diameter adjustment mechanism 62, and lock the position of the hoop to complete the installation of the sliding device.

[0080] Subsequently, according to the operation requirements, control the lifting device to pull the cable 51 to make the whole sliding device rise or fall along the axial direction of the leg 2. During the sliding process, the diameter adjustment mechanism 62 is in the unlocked state, and the sliding assistance mechanism 52 is in the sliding assistance state. The balls 5221 extend out of the ball grooves 5222 to form rolling contact with the leg 2, effectively reducing friction and ensuring the smooth rise or fall of the sliding device. When the sliding device moves to the target operation depth, the rubber pad 711 in the clamping mechanism 71 will first press tightly against the leg 2. After the clamping mechanism 71 clamps the leg 2, the driving mechanism will release the sliding assistance state of the sliding assistance mechanism 52, and the balls 5221 completely enter the ball grooves 5222. At the same time, the diameter adjustment mechanism 62 further locks the two arc-shaped hoops 11 to achieve the stable clamping and precise positioning of the sliding device.

[0081] At this time, the underwater operation device 4 installed on the installation base 3 can start operations, such as seabed survey, cleaning of attachments, structural inspection or maintenance tasks. After the operation is completed, the diameter adjustment mechanism 62 will first adjust the distance between the two arc-shaped hoops 11, and the driving mechanism will open the sliding assistance state of the sliding assistance mechanism 52, that is, the balls 5221 extend out of the ball grooves 5222 to form rolling contact with the leg 2 again. Then, the clamping mechanism 71 first releases the clamping state, the sliding device re-enters the sliding state, and then the lifting device drives the sliding device to move up to the offshore operation platform through the cable 51 to complete the disassembly of the sliding device.

[0082] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. An offshore leg attachment sliding device, characterized in that, Comprising: A clamp assembly, the clamp assembly including two arc-shaped clamps (11), the two arc-shaped clamps (11) being clamped on the pile leg (2), and an installation base (3) being provided on the arc-shaped clamp (11), and an underwater operation device (4) being adapted to be installed on the installation base (3); A moving assembly, the moving assembly including: a cable (51) and a sliding assistance mechanism (52), one end of the cable (51) being connected to the top of the clamp assembly, the other end being connected to a lifting device, the sliding assistance mechanism (52) being disposed on the arc-shaped clamp (11), and including: a driving member (521) and a sliding member (522), the sliding assistance mechanism (52) having a sliding assistance state in which the driving member (521) drives the sliding member (522) to extend out of the inner side of the arc-shaped clamp (11) and slide in contact with the pile leg (2), and a retraction state in which the driving member (521) drives the sliding member (522) to retract into the arc-shaped clamp (11); A connection assembly, the connection assembly including: an elastic tensioning mechanism (61) and a diameter adjustment mechanism (62), the first connection ends of the two arc-shaped clamps (11) being connected by the elastic tensioning mechanism (61), the second connection ends of the two arc-shaped clamps (11) being connected by the diameter adjustment mechanism (62), the diameter adjustment mechanism (62) having an unlocking state in which a driving force is provided to the clamp assembly through the cable (51) to drive it to slide up and down along the pile leg (2), and a locking state in which the position of the clamp assembly is locked; A clamping assembly, the clamping assembly including two sets of clamping mechanisms (71), the two sets of clamping mechanisms (71) being respectively disposed on the two arc-shaped clamps (11), the clamping assembly having a clamping state in which the two sets of clamping mechanisms (71) clamp the outer wall of the pile leg (2), and a separation state in which the two sets of clamping mechanisms (71) are separated from the outer wall of the pile leg (2).

2. The marine leg attachment sliding device according to claim 1, characterized in that, The diameter adjustment mechanism (62) includes: a connecting rod (621), a gear nut (622), a first driving gear (623), and a first driving motor (624), a connection hole being opened at the second connection end of the arc-shaped clamp (11), the connecting rod (621) passing through the connection holes on the two arc-shaped clamps (11), and one end of the connecting rod (621) being a threaded end, the gear nut (622) being disposed on the threaded end, the first driving motor (624) being disposed on any one of the arc-shaped clamps (11), the first driving gear (623) being disposed on the driving end of the first driving motor (624) and being in tooth engagement with the gear nut (622).

3. The offshore pile leg auxiliary sliding device according to claim 1, characterized in that, The elastic tensioning mechanism (61) includes a plurality of elastic members (611) spaced apart along the axial direction of the pile leg (2), and two ends of the elastic member (611) are respectively connected to the first ends of the two arc-shaped clamps (11).

4. The offshore leg attachment sliding device according to claim 3, characterized in that, The elastic tensioning mechanism (61) further includes a plurality of mounting grooves (612) formed on the first end portion of the arc-shaped hoop (11). The plurality of mounting grooves (612) are arranged at intervals along the axial direction of the pile leg (2), and the mounting grooves (612) on the two arc-shaped hoops (11) correspond to each other. Both ends of the elastic member (611) are respectively connected to the wall surfaces of the mounting grooves (612).

5. The offshore leg attachment sliding device according to claim 4, characterized in that, The sliding member (522) includes a plurality of balls (5221). The arc-shaped hoop (11) is provided with multiple groups of grooves at intervals along the axial direction of the pile leg (2). Each group of grooves includes a plurality of ball grooves (5222) arranged at intervals along the circumferential direction of the arc-shaped hoop (11). The balls (5221) are arranged in the ball grooves (5222).

6. The offshore leg attachment sliding device according to claim 5, characterized in that, The driving member (521) includes: a second driving motor (5211) and a pushing plate (5212). The pushing plate (5212) axially penetrates through the ball grooves (5222) along the pile leg (2). A rack is provided on the side of the pushing plate (5212) away from the pile leg (2). The second driving motor (5211) is arranged on the top of the arc-shaped hoop (11), and its driving end is connected with a second driving gear (5213). The rack is in meshing connection with the second driving gear (5213).

7. The offshore leg attachment sliding device according to claim 6, characterized in that, The depth of the ball groove (5222) is greater than the diameter of the ball (5221) and less than the sum of the diameter of the ball (5221) and the thickness of the baffle plate.

8. The offshore leg attachment sliding device according to claim 1, wherein The clamping mechanism (71) includes: a telescopic rod (712), a connecting plate (713), a fixed rod (714) and a rubber pad (711). The telescopic rod (712) is arranged on the side wall of the arc-shaped hoop (11), and its driving end is connected to the connecting plate (713). The fixed rod (714) is slidably arranged on the arc-shaped hoop (11), and one end is connected to the connecting plate (713) and the other end is connected to the rubber pad (711).

9. The offshore leg attachment sliding device according to claim 8, wherein, The side of the rubber pad (711) facing the pile leg (2) is an arc surface.

10. The offshore leg attachment sliding device according to any one of claims 1-9, characterized in that, Mounting screw holes (31) are provided on the mounting base (3). The underwater operation device (4) is mounted on the mounting base (3) through the mounting screw holes (31).

Images