A pile leg hoisting and steering method and hoisting device

Abstract

The present invention relates to the technical field of pile leg hoisting, and specifically to a pile leg hoisting and steering method and hoisting device, comprising: step 1: hoisting the pile leg by a hoisting device, and placing a roadbed plate at the same time; step 2: pushing and rotating the pile leg by an external driving device; step 3: putting down the pile leg after rotating to a specified angle; step 4: loosening the hoisting device and the pile leg, and letting it stand to release the stress between the hook head and the wire rope; step 5: hoisting the pile leg again by the hoisting device to complete the steering. By adopting the steps of hoisting, rotating, putting down, and hoisting again, the pile leg can be rotated into place at one time, reducing the process of rotation due to torque, greatly improving the adjustment time, and improving the installation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of pile leg hoisting, and in particular to a pile leg hoisting steering method and a hoisting device. Background Art

[0002] As global energy shortages and environmental pollution become increasingly serious, wind power generation has developed rapidly as a pollution-free renewable energy source. Due to limited land space and high offshore wind energy density, offshore wind energy development has received increasing attention. Self-elevating wind power installation ships have stable structures and high working efficiency, and are currently widely used. The pile leg is a key component to achieve self-elevation of the entire ship. The direction of the pile leg assembly is inconsistent with the direction of the main hull during the floating crane hoisting at the dock. In order to avoid the inability to install after boarding the ship, it is necessary to rotate the pile leg assembly after the hook is lifted before it can be close to the main hull. The pile leg is rotated with the help of external force, and it will turn back after the external force is withdrawn. On site, the floating crane hook head wire rope is generally rotated first, and the torsion of the wire rope is used to rotate the hook head structure partly. It needs to be repeated many times, and the torsion force inside the wire rope is used to turn the pile leg to the specified direction. The whole process takes about 45 minutes, which is a long time, thus affecting the progress of the project. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a pile leg hoisting and steering method and a hoisting device to solve the problem that the rotation of the pile leg causes a long time and affects the work efficiency.

[0004] Based on the above purpose, the present invention provides a pile leg hoisting and steering method, comprising:

[0005] Step 1: Lift the pile legs with the lifting device and place the roadbed plate at the same time;

[0006] Step 2: Push and rotate the pile legs through an external driving device to rotate the pile legs to a specified direction;

[0007] Step 3: After the pile legs are rotated into place, lower them;

[0008] Step 4: Loosen the lifting device from the pile leg, let it stand, and release the stress between the hook and the wire rope;

[0009] Step 5: Lift the pile legs again by the lifting device to complete the turning. A further improvement is that the roadbed plate is placed corresponding to the pile leg position.

[0010] A further improvement is that the static time is the time for the stress generated in the lifting device as the pile legs rotate to be completely released.

[0011] A lifting device is also provided, including a supporting platform, a lifting bracket is installed on one side of the supporting platform, a lifting wire rope is arranged on the lifting bracket, a connecting mechanism is installed at the end of the lifting wire rope, and a lifting hook is installed at the lower end of the connecting mechanism.

[0012] A further improvement is that the connecting mechanism includes a connecting block connected to the lower end of the lifting wire rope, the lower end of the connecting block is connected to a mounting shell, a rotating plate is rotatably arranged inside the mounting shell, a steel cable is connected to the lower side of the rotating plate, an opening is provided at the lower end of the mounting shell, and the steel cable passes through the opening to be connected to the hook.

[0013] A further improvement is that a connecting column is installed in the middle of the installation shell, and the lower end of the connecting column passes through the rotating plate and is fixedly connected to the support plate.

[0014] A further improvement is that the diameter of the support plate is smaller than the diameter of the opening.

[0015] A further improvement is that balls are rotatably arranged on the inner wall of the mounting shell and the support plate, an annular groove is arranged on the surface of the rotating plate, and the balls are matched with the annular groove.

[0016] A further improvement is that a guide plate is arranged around the lower end of the support plate, and the guide plate is arranged at an angle.

[0017] A further improvement is that a reinforcing rib is connected between the connecting block and the mounting shell.

[0018] The beneficial effects of the present invention are as follows: by first lifting the pile legs vertically, rotating them by external force, and then lowering the pile legs after rotation, the torque generated by the rotation of the wire rope is prevented from driving the pile legs to rotate; after the pile legs are lowered, the lifting device is kept in a stopped state, so that the torsional stress generated by the twisting of the wire rope of the lifting device as the pile legs rotate is restored, and the pile legs are lifted again after the stress is completely released, so that the pile legs can be lifted smoothly after adjusting the direction, which is convenient for the subsequent installation of the pile legs. Compared with the lifting technology of the prior art, the time is shortened by about half, the work efficiency is greatly improved, and it is beneficial to the progress of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the process of an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of a lifting device according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the connection mechanism structure of an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the casing structure installed in an embodiment of the present invention.

[0024] The markings in the figure are: 1. Support platform; 2. Lifting bracket; 3. Lifting wire rope; 4. Hook; 5. Connecting block; 6. Mounting shell; 7. Rotating plate; 8. Steel cable; 9. Connecting column; 10. Support plate; 11. Ball bearing; 12. Annular groove; 13. Guide plate; 14. Reinforcing rib. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0026] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] like Figure 1 As shown, this embodiment provides a pile leg hoisting and steering method, comprising:

[0028] Step 1: Lift the pile legs with the lifting device and place the roadbed plate at the same time;

[0029] Step 2: Push and rotate the pile legs through an external driving device to rotate the pile legs to a specified direction;

[0030] Step 3: After the pile legs are rotated into place, lower them;

[0031] Step 4: Loosen the lifting device from the pile leg, let it stand, and release the stress between the hook and the wire rope;

[0032] Step 5: Lift the pile legs again using the lifting device to complete the turn.

[0033] By using external force to rotate the hoisted pile legs, the process of rotating the pile legs by the torsion of the wire rope is replaced, so that the pile legs can be stably rotated into place at one time; after being rotated into place, they are lowered and loosened from the lifting device, which effectively prevents the wire rope from generating torsional stress during rotation and driving the pile legs that have been rotated into place to rotate, effectively ensuring the accuracy of the rotation position; after the lifting device is loosened from the pile legs, wait for the torsional stress generated by the rotation of the wire rope of the lifting device to be completely released, and then the pile legs are re-lifted and installed by the lifting device, which effectively ensures the accuracy of the direction of the pile legs and the stability of the lifting, so that the pile legs can be rotated into place at one time. The whole process takes 15 to 20 minutes, reducing the floating hoisting time. Six pile legs can save about 3 hours of floating hoisting time, effectively improving work efficiency and facilitating the progress of the project.

[0034] The roadbed plate is placed corresponding to the position of the pile legs, so that the pile legs can be positioned and placed, ensuring the stability of the placement of the pile legs.

[0035] The static time is the time for the torsional stress generated by the rotation of the pile legs in the lifting device to be completely released. By statically resting, the torsional stress generated by the rotation of the pile legs on the wire rope of the lifting device is completely released, which facilitates the subsequent stable lifting of the pile legs.

[0036] like Figure 2 As shown, this embodiment provides a lifting device, including a supporting platform 1, a lifting bracket 2 is installed on one side of the supporting platform 1, and a lifting wire rope 3 is arranged on the lifting bracket 2. The lifting bracket 2 and the lifting wire rope 3 are both existing technologies and are not particularly limited here; a connecting mechanism is installed at the end of the lifting wire rope 3, and a hook 4 is installed at the lower end of the connecting mechanism.

[0037] like Figure 3 As shown, the connecting mechanism includes a connecting block 5 connected to the lower end of the lifting wire rope 3, the lower end of the connecting block 5 is connected to a mounting shell 6, a rotating plate 7 is rotatably arranged in the mounting shell 6, a steel cable 8 is connected to the lower side of the rotating plate 7, an opening is provided at the lower end of the mounting shell 6, the steel cable 8 passes through the opening and is connected to the hook 4, three groups of steel cables 8 and hooks 4 are arranged, and the steel cables 8 are equidistantly arranged around the rotating plate 7.

[0038] like Figure 4 As shown, a connecting column 9 is installed in the middle of the mounting shell 6, and the lower end of the connecting column 9 passes through the rotating plate 7 and is fixedly connected to a supporting plate 10. The rotating plate 7 rotates around the rotating plate 7, and the supporting plate 10 supports the rotating plate 7 from the bottom to improve the structural strength.

[0039] The diameter of the support plate 10 is smaller than the diameter of the opening. There is a certain distance between the support plate 10 and the inner wall of the opening. The steel cable 8 extends out from the gap between the support plate 10 and the opening.

[0040] A guide plate 13 is arranged around the lower end of the support plate 10. The guide plate 13 is arranged obliquely. A clamping groove is arranged on the guide plate 13 corresponding to the steel cable 8. The steel cable 8 can be clamped in the clamping groove and guided by the guide plate 13 to extend outward to prevent the steel cables 8 from being entangled with each other.

[0041] Balls 11 are rotatably arranged on the inner wall of the mounting shell 6 and the support plate 10, and an annular groove 12 is arranged on the surface of the rotating plate 7, and the ball 11 is adapted to the annular groove 12; by arranging the ball 11, the rotating plate 7 contacts with the ball 11, reducing friction and facilitating the rotation of the rotating plate 7.

[0042] A reinforcing rib 14 is connected between the connecting block 5 and the mounting shell 6 to improve the structural strength between the mounting shell 6 and the connecting block 5 .

[0043] The lifting hook 4 is driven to rise and fall for lifting by the lifting bracket 2 and the lifting wire rope 3; during lifting, the lifting hook 4 is hooked with the pile leg and lifts the pile leg. During the lifting process, the pile leg is rotated by external force. During the rotation, the lifting hook 4 and the steel cable 8 drive the rotating plate 7 to rotate in the installation shell 6. The rotation of the rotating plate 7 reduces the torsion of the lifting wire rope 3, facilitates the rapid release of the subsequent stress of the lifting wire rope 3, and effectively improves the lifting efficiency.

[0044] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for hoisting and steering pile legs, It is characterized in that include: Step 1: Lift the pile legs with the lifting device and place the roadbed plate at the same time; Step 2: Push and rotate the pile legs through an external driving device to rotate the pile legs to a specified direction; Step 3: After the pile legs are rotated into place, lower them; Step 4: Loosen the lifting device from the pile legs and let it stand; Step 5: Lift the pile legs again using the lifting device to complete the turning; It also includes a lifting device for implementing the pile leg lifting and steering method, including a support platform (1), a lifting bracket (2) installed on one side of the support platform (1), a lifting wire rope (3) arranged on the lifting bracket (2), a connecting mechanism installed at the end of the lifting wire rope (3), and a hook (4) installed at the lower end of the connecting mechanism; the connecting mechanism includes a connecting block (5) connected to the lower end of the lifting wire rope (3), the lower end of the connecting block (5) is connected to a mounting shell (6), a rotating plate (7) is rotatably arranged in the mounting shell (6), a steel cable (8) is connected to the lower side of the rotating plate (7), an opening is provided at the lower end of the mounting shell (6), and the steel cable (8) passes through the opening and is connected to the hook (4); a connecting column (9) is installed in the middle of the mounting shell (6), and the lower end of the connecting column (9) passes through the rotating plate (7) and is fixedly connected to the support plate (10).

2. A pile leg hoisting and steering method according to claim 1, It is characterized in that The roadbed plate is placed corresponding to the pile leg position.

3. A pile leg hoisting and steering method according to claim 1, It is characterized in that The static time is the time it takes for the torque generated by the rotation of the pile legs in the lifting device to be completely released.

4. A pile leg hoisting and steering method according to claim 1, It is characterized in that The diameter of the support plate (10) is smaller than the opening diameter.

5. A pile leg hoisting and steering method according to claim 1, It is characterized in that Ball bearings (11) are rotatably arranged on the inner wall of the mounting housing (6) and the support plate (10), and an annular groove (12) is arranged on the surface of the rotating plate (7), and the ball bearings (11) are adapted to fit the annular groove (12).

6. A pile leg hoisting and steering method according to claim 1, It is characterized in that A guide plate (13) is arranged around the lower end of the support plate (10), and the guide plate (13) is arranged at an angle.

7. A pile leg hoisting and steering method according to claim 1, It is characterized in that A reinforcing rib (14) is connected between the connecting block (5) and the mounting shell (6).

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