A method of hoisting a pile frame

Abstract

The application relates to a pile frame hoisting method and belongs to the technical field of ship manufacturing. The pile frame hoisting method comprises the following steps: setting a hoisting angle of a pile frame as alpha, setting a setting angle of a variable-amplitude oil cylinder as beta according to the alpha and the pile frame; determining a gravity center of the pile frame, setting two main lifting points and two auxiliary lifting points on the pile frame, connecting a single-hook hoisting system through steel ropes, the distance between the main lifting points and the single-hook hoisting system is less than the distance between the main lifting points and the auxiliary lifting points, and the distance between the auxiliary lifting points and the single-hook hoisting system is less than the distance between the main lifting points and the auxiliary lifting points; lifting the upper end of the pile frame through the single-hook hoisting system, rotating the pile frame around a dummy shaft seat to an angle alpha with a horizontal plane, then lifting and moving the pile frame to above the variable-amplitude oil cylinder, and aligning hinge points with a front hinge seat. The scheme provided by the application sets the support angle of the variable-amplitude oil cylinder and the hoisting angle of the pile frame, adjusts the posture of the pile frame through the main lifting points, cooperates the postures of the pile frame through the main lifting points and the auxiliary lifting points, and solves the hoisting problem of the oil cylinder in the later period.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship manufacturing, and in particular to a pile frame hoisting method. BACKGROUND

[0002] The pile frame installation operation of a pile driving vessel generally needs to be performed by two hooks of a hoisting device or multiple devices in combination. However, a small and medium-sized shipyard may have a problem of insufficient number of hoisting devices or limited hoisting capacity, and generally needs to rent hoisting devices to perform the hoisting operation of the pile frame, but the rental cost of these devices is high, a certain access time is required, and the devices will occupy the site in the yard, which undoubtedly increases unnecessary operating costs. SUMMARY

[0003] To overcome the problems in the prior art, the main purpose of the present application is to provide a pile frame hoisting method, which realizes the hoisting and posture adjustment of the pile frame by designing the hoisting angle of the pile frame and the erection angle of the oil cylinder, and simultaneously solves the problem of difficult hoisting of the variable-amplitude oil cylinder in the later period.

[0004] The present application provides a pile frame hoisting method for hoisting a pile frame onto a ship body by a single-hook hoisting system, wherein the pile frame is provided with a dummy shaft seat and a hinge point, and the ship body is provided with a variable-amplitude oil cylinder and a front hinge seat.

[0005] The hoisting angle of the pile frame is set as α, and the erection angle of the variable-amplitude oil cylinder is set as β according to the α and the pile frame.

[0006] The center of gravity of the pile frame is determined, two main lifting points and two auxiliary lifting points are arranged on the pile frame based on the center of gravity, the main lifting points and the auxiliary lifting points are connected to the single-hook hoisting system by steel ropes, and the distance between the main lifting points and the single-hook hoisting system is less than the distance between the main lifting points and the auxiliary lifting points, which is less than the distance between the auxiliary lifting points and the single-hook hoisting system.

[0007] The upper end of the pile frame is lifted by the single-hook hoisting system, the pile frame is rotated around the dummy shaft seat to an angle of α with the horizontal plane, and then is lifted and moved to above the variable-amplitude oil cylinder to align the hinge point with the front hinge seat.

[0008] In some embodiments, the load-bearing loads of the main lifting points and the auxiliary lifting points are configured to be approximately evenly distributed.

[0009] In some embodiments, the steel ropes include a first steel rope and a second steel rope, and the included angle between the first steel rope and the second steel rope is less than 60° when the pile frame is in a hoisting state.

[0010] In some embodiments, the included angle between the first steel rope and the plumb line is 22°-29°, and the included angle between the second steel rope and the plumb line is 24-31°.

[0011] In some embodiments, the pile frame comprises a slide, a sub-frame, an outfitting, a mouthpiece and a fixed pulley set, and the center of gravity of the pile frame is determined as follows:

[0012] A three-dimensional coordinate of the slide, the sub-frame, the outfitting, the mouthpiece and the fixed pulley set is established with the hinge point as the coordinate origin;

[0013] The weight w1 of the slide is obtained, and the center of gravity coordinate (x1, y1, z1) of the slide is determined;

[0014] The weight w2 of the sub-frame is obtained, and the center of gravity coordinate (x2, y2, z2) of the sub-frame is determined;

[0015] The weight w3 of the outfitting is obtained, and the center of gravity coordinate (x3, y3, z3) of the outfitting is determined;

[0016] The weight w4 of the mouthpiece is obtained, and the center of gravity coordinate (x4, y4, z4) of the mouthpiece is determined;

[0017] The weight w5 of the fixed pulley set is obtained, and the center of gravity coordinate (x5, y5, z5) of the fixed pulley set is determined;

[0018] The center of gravity coordinate (x, y, z) of the pile frame is calculated by the formula

[0019]

[0020] The center of gravity coordinate (x, y, z) of the pile frame is calculated by the formula

[0021] In some embodiments, the alpha is 44°-50°.

[0022] In some embodiments, the alpha is 47°.

[0023] In some embodiments, the beta is 28°-31°.

[0024] In some embodiments, the beta is 29.7°.

[0025] In some embodiments, the single-hook hoisting system is a gantry crane.

[0026] The technical scheme provided in the application can include the following beneficial effects:

[0027] The pile frame hoisting method provided by the application hoists the pile frame to the ship body by using a single-hook hoisting system, the distance relationship among the main hoisting point, the auxiliary hoisting point and the single-hook hoisting system is designed as the distance between the main hoisting point and the single-hook hoisting system is less than the distance between the main hoisting point and the auxiliary hoisting point, and the distance between the auxiliary hoisting point and the single-hook hoisting system, so that the pile frame can form a hoisting posture with an included angle of a with the horizontal plane when the pile frame is in a suspended state. In combination with the hoisting angle and the structural layout of the pile frame, the luffing cylinder is inclinedly arranged on the ship body at an included angle of β, the synchronous hoisting of the pile frame and the luffing cylinder is realized, and the problem of difficult hoisting of the luffing cylinder in the later stage is solved. In the case that the number of existing hoisting equipment is limited, the hoisting work of the pile frame is completed by using only the single hook, the need for renting other large hoisting equipment is avoided, and the advantages of low hoisting cost and high efficiency are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0028] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the figures, and in which:

[0029] Figure 1 is a structural schematic diagram of a pile driving barge shown in the embodiments of the present application;

[0030] Figure 2 is a structural schematic diagram of a ship body shown in the embodiments of the present application;

[0031] Figure 3 is a structural schematic diagram of a pile frame shown in the embodiments of the present application;

[0032] Figure 4 is a structural schematic diagram of a ladder and a railing shown in the embodiments of the present application;

[0033] Figure 5 is a top view of a pile frame shown in the embodiments of the present application;

[0034] Figure 6 is a state diagram of a part of a pile frame rotating around a dummy shaft seat shown in the embodiments of the present application;

[0035] Figure 7 is a structural schematic diagram of a dummy shaft seat shown in the embodiments of the present application;

[0036] Figure 8 is a hoisting diagram of a pile frame shown in the embodiments of the present application;

[0037] Figure 9 is another hoisting diagram of a pile frame shown in the embodiments of the present application;

[0038] Figure 10is another hoisting schematic view of the pile frame shown in the embodiments of the present application;

[0039] Figure 11 is another hoisting schematic view of the pile frame shown in the embodiments of the present application.

[0040] 1, hull; 10, luffing cylinder; 11, front hinge seat; 12, shelf;

[0041] 2, pile frame; 20a, center of gravity; 20b, main lifting point; 20c, auxiliary lifting point; 20d, dummy shaft seat; 20e, hinge point; 21, slide; 22, sub-frame; 23, outfitting; 24, spudcan; 25, fixed pulley block;

[0042] 3, single-hook hoisting system; 30, lifting hook; 31, first steel rope; 32, second steel rope. DETAILED DESCRIPTION

[0043] The preferred embodiments of the present application will be described in more detail by referring to the attached drawings. Although the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application is more thoroughly and completely conveyed to those skilled in the art, and the scope of the present application is fully conveyed to those skilled in the art.

[0044] The terms used in the present application are merely for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.

[0045] In the prior art, the pile frame hoisting of a pile-driving ship generally relies on the joint operation of multiple hoisting devices. When multiple hoisting devices hoist the pile frame, the lifting points and steel ropes on the pile frame can be set relatively freely, and the attitude adjustment of the pile frame in the suspended state can be achieved through the lifting hooks corresponding to different lifting points during hoisting, without the need for hoisting design through the center of gravity of the pile frame, so the hoisting operation is relatively simple. In view of the fact that the shipyard lacks equipment to meet the hoisting operation of multiple hoisting devices, the present scheme is proposed. The pile frame hoisting method provided by the embodiments of the present application adjusts the hoisting angle of the pile frame and the erection angle of the oil cylinder, uses a single-hook hoisting system to realize the hoisting and attitude adjustment of the pile frame, and also solves the problem of difficult hoisting of the luffing cylinder in the later stage.

[0046] The technical solutions of the embodiments of the present application will be described in detail below with reference to the drawings.

[0047] Figure 1is a structural schematic diagram of a piling ship shown in an embodiment of the present application, Figure 2 is a structural schematic diagram of a hull 1 shown in an embodiment of the present application, Figure 3 is a structural schematic diagram of a pile rack 2 shown in an embodiment of the present application.

[0048] As shown in Figures 1 to 11 , the pile rack hoisting method provided by the embodiment of the present application is used for hoisting a pile rack 2 to a hull 1 through a single-hook hoisting system 3, the pile rack 2 is provided with an axle seat 20d and a hinge point 20e, and the hull 1 is provided with a luffing cylinder 10 and a front hinge seat 11;

[0049] The hoisting angle of the pile rack 2 is set as α, and the erection angle of the luffing cylinder 10 of the pile rack 2 is set as β according to the α;

[0050] The center of gravity 20a of the pile rack 2 is determined, two main lifting points 20b and two auxiliary lifting points 20c are arranged on the pile rack 2 based on the center of gravity 20a, the main lifting points 20b and the auxiliary lifting points 20c are connected to the single-hook hoisting system 3 through a steel rope, the distance between the main lifting points 20b and the single-hook hoisting system 3 is less than the distance between the main lifting points 20b and the auxiliary lifting points 20c, and the distance between the auxiliary lifting points 20c and the single-hook hoisting system 3 is less than the distance between the main lifting points 20b and the auxiliary lifting points 20c;

[0051] The upper end of the pile rack 2 is lifted through the single-hook hoisting system 3, the pile rack 2 is rotated around the axle seat 20d to an angle of α with the horizontal plane, and then is lifted and moved to above the luffing cylinder 10, so that the hinge point 20e is aligned with the front hinge seat 11.

[0052] In the embodiment, the pile frame 2 is hoisted above the luffing cylinder 10 by the single-hook hoisting system 3, the pile frame 2 is slowly lowered to make the luffing cylinder 10 pass through the tail end space of the pile frame 2, and after the hinge point 20e of the pile frame 2 is aligned with the hinge seat of the ship body 1, the pile frame 2 can be installed and fixed on the ship body 1. In the implementation of the above technical scheme, based on the particularity that the single-hook hoisting system 3 cannot adjust the posture of the pile frame 2 during hoisting, according to the maximum lifting height of the single-hook hoisting system 3, the structure of the pile frame 2, the tail end space, and the installation portability after hoisting, the angle between the pile frame 2 in the hoisting state and the horizontal plane is α. Based on the angle α, the movement trajectory of the tail end space is calculated, and under the premise of ensuring that the luffing cylinder 10 and the pile frame 2 do not interfere and collide, the luffing cylinder 10 is erected on the ship body 1 at an angle β in a fixed manner. Since the pile frame 2 is hoisted by a single hook, the position of the center of gravity 20a of the pile frame 2 is calculated and determined by geometric method and coordinate system method. After the position of the center of gravity 20a of the pile frame 2 is determined, two or more main lifting points 20b and auxiliary lifting points 20c are arranged on the pile frame 2, and lifting lugs are installed at the main lifting points 20b and the auxiliary lifting points 20c, so that the hooks 30 of the single-hook hoisting system 3 can be connected by steel ropes. The main lifting points 20b, the auxiliary lifting points 20c, and the hooks 30 form a triangular structure. After the main lifting points 20b and the auxiliary lifting points 20c are determined, the angle between the line connecting the main lifting points 20b and the auxiliary lifting points 20c and the horizontal plane is also α, but there are infinite combinations of the distance between the main lifting points 20b and the hooks 30 and the distance between the auxiliary lifting points 20c and the hooks 30, although these combinations can all achieve the hoisting state at an angle α. However, the original intention of the present application is to realize the single-hook hoisting operation of the pile frame 2 based on the equipment and facilities of the shipyard. In order to ensure the safety and controllability of the construction operation, according to the accessory information of the shipyard, such as the load of the lifting lug, the specification information of the steel rope, the horizontal load of the hook 30, and the maximum lifting height of the single-hook hoisting system 3, the distance between the main lifting points 20b and the single-hook hoisting system 3 is configured to be less than the distance between the main lifting points 20b and the auxiliary lifting points 20c, and the distance between the main lifting points 20b and the auxiliary lifting points 20c is configured to be less than the distance between the auxiliary lifting points 20c and the single-hook hoisting system 3. When adjusting the posture of the pile frame 2, one end of the pile frame 2 is lifted by the main lifting points 20b, and in the process of rotating the pile frame 2 around the dummy shaft seat 20d, the auxiliary lifting points 20c cooperate to keep the posture of the pile frame 2 stable, and when the pile frame 2 is rotated around the dummy shaft seat 20d to an angle α with the horizontal plane, the pile frame 2 is lifted and moved above the luffing cylinder 10, so that the hinge point 20e is aligned with the front hinge seat 11, and the hoisting operation of the pile frame 2 is realized.After the pile frame 2 is lifted by the single-hook hoisting system 3 through the main hoisting point and the auxiliary hoisting point, the center of gravity of the pile frame 2 and the hook 30 are located on the same vertical line. The distance between the main hoisting point and the single-hook hoisting system 3 is configured to be less than the distance between the main hoisting point and the auxiliary hoisting point. On the basis of configuring the distance between the main hoisting point and the auxiliary hoisting point to be less than the distance between the auxiliary hoisting point and the single-hook hoisting system 3, the line connecting the main hoisting point and the hook is defined as L1, the angle between L1 and the vertical line is defined as C1, the line connecting the auxiliary hoisting point and the hook is defined as L2, and the angle between L2 and the vertical line is C2. In order to reduce the horizontal load borne by the hook 30, the main hoisting point and the auxiliary hoisting point, the load-bearing load of the main hoisting point and the auxiliary hoisting point is configured to be approximately evenly distributed, that is, C1 is approximately equal to C2. In some embodiments, the steel rope includes a first steel rope 31 and a second steel rope 32. In the hoisting state of the pile frame, the angle between the first steel rope 31 and the second steel rope 32 is less than 60°. In this embodiment, C1 is preferably 22° to 29°, and C2 is preferably 24° to 31°.

[0053] It can be understood that, although the center of gravity 20a of the pile frame 2 can be determined by the coordinate system method, the geometric method, the segmentation method and the suspension method, since the slide 21, the auxiliary frame 22, the outfitting 23, the gate 24 and the pulley block 25 are connected by welding, the weight of the pile frame 2 is generally tens to hundreds of tons, and the weight of the welding material generally accounts for 5% of the weight of the pile frame 2. Therefore, the calculated center of gravity 20a will have a slight deviation, so it is difficult to achieve even load distribution in actual application.

[0054] The single-hook hoisting system 3 in the embodiment is a gantry crane, and a portal crane or a crawler crane can also be used alone. The angle of the pile frame 2 in the hoisting posture is α, wherein α is 28°-31°, and the preferred value of α in the embodiment is 29.7°. The luffing cylinder 10 is inclinedly arranged on the ship body 1 by an angle β, the vertical height of the luffing cylinder 10 is the length of the luffing cylinder 10 multiplied by sin(β), wherein β is 44°-50°, and the preferred value of β in the embodiment is 47°. Under the above arrangement, the pile frame 2 can be lowered from above the luffing cylinder 10 to be aligned with the hinge point 20e, and the pile frame 2 will not collide with the luffing cylinder 10. The relationship between α and β is positive correlation. When α is smaller, β is also smaller, so that the luffing cylinder 10 can pass through the space of the tail end inclined surface of the pile frame 2. The hoisting posture of the pile frame 2 is fixed, so that when the single-hook hoisting system 3 hoists the pile frame 2, the top end of the luffing cylinder 10 passes through the space of the tail end inclined surface of the pile frame 2. During the lifting of the pile frame 2, the luffing cylinder 10 will not collide with the space of the tail end inclined surface of the pile frame 2. The two main lifting points 20b and the two auxiliary lifting points 20c on the pile frame 2 are arranged on the auxiliary frame 22. The posture adjustment of the pile frame 2 before leaving the ground is completed through the main lifting points 20b, and the pile frame 2 is hoisted and transported through the main lifting points 20b and the auxiliary lifting points 20c. The present application can complete the hoisting work of the pile frame 2 by using a single hook 30 under the condition that the number of existing hoisting equipment is limited, and the need for renting other large hoisting equipment is avoided, which has the advantages of low hoisting cost and high efficiency.

[0055] The pile frame 2 is assembled by a plurality of structural members, such as the slide 21, the auxiliary frame 22, the outfitting 23, the dragon mouth 24, and the fixed pulley block 25. The slide 21, the auxiliary frame 22, the outfitting 23, the dragon mouth 24, the fixed pulley block 25, the plug-in pin device, and the channel steel are assembled according to the drawings. The outfitting 23 includes the assembly and welding of each layer of platform, railing, cable, and pipe. Four lifting lugs are welded on the two main lifting points 20b and the two auxiliary lifting points 20c. Finally, the pile frame 2 and the outfitting 23 are painted. A support seat for supporting the pile frame 2 during hoisting and rotation is arranged on the ground. The support seat is provided with a pin hole, and a dummy shaft seat 20d is arranged in the pin hole. The dummy shaft seat 20d is connected with the pile frame 2, so that the pile frame 2 can rotate around the dummy shaft seat 20d. After the assembly of the pile frame 2 is completed, the mounting seat of the luffing cylinder 10 of the ship body 1 is positioned, welded, and bored. The luffing cylinder 10 is arranged by using a support frame. The nose beam and the front hinge seat 11 are assembled and welded on the ship body 1. The pin shaft of the front hinge seat 11 is tested. After the test is qualified, the pin shaft is moved away by a certain distance. The pile frame 2 can be directly assembled after the hinge point 20e of the pile frame 2 is aligned with the front hinge seat 11. The auxiliary tools such as the jack and the hand-operated hoist are prepared. Finally, the equipment and the scaffold in the hoisting area on the ship are removed, and the travel route of the pile frame 2 hoisted on the ship is ensured to be smooth.

[0056] The shipyard knows the size and weight of each structural member when designing the pile rack 2, so the center of gravity 20a of the pile rack 2 can be determined by the coordinate system method. A certain point of the pile rack 2 is taken as the coordinate origin, and the three-dimensional coordinates of each structural member are generated by first modeling the pile rack 2 in three dimensions, and the center of gravity 20a of each structural member is calculated, for example, the center of gravity coordinates (x1, y1, z1) of the ramp 21, the center of gravity coordinates (x2, y2, z2) of the sub-frame 22, the center of gravity coordinates (x3, y3, z3) of the outfitting 23, the center of gravity coordinates (x4, y4, z4) of the dragon mouth 24, and the center of gravity coordinates (x5, y5, z5) of the group of fixed pulleys 25, and then the center of gravity coordinates (x, y, z) of the pile rack 2 are calculated according to the following formula:

[0057]

[0058] The center of gravity coordinates (x, y, z) of the pile rack 2 are calculated.

[0059] In addition, to improve the accuracy of calculating the center of gravity 20a of the pile rack 2, irregular structural members such as the sub-frame 22 can be subdivided into regular keel structures, and the center of gravity 20a of each keel structure is obtained by the coordinate method, and then the center of gravity 20a of the sub-frame 22 is calculated by the coordinate system method.

[0060] Corresponding to the foregoing application function implementation method embodiment, the present application also provides an application example applied to the foregoing pile rack single hook hoisting method, and the specific implementation process is as follows:

[0061] Preparation before hoisting:

[0062] Pillow positions are added at the front end and tail of the hull 1, and then the pile rack 2 is subjected to boring and assembly welding construction of the sub-frame 22 and the ramp 21 and the dragon mouth 24. Then, the outfitting 23 operation is performed, including the assembly welding of each layer platform, railing, cable and pipe. After the ear welding of the pile rack 2 and the inspection process are completed, the pile rack 2 and its outfitting 23 parts are subjected to painting treatment. Then, the support seat for hoisting the pile rack 2 is arranged, and the pile rack scaffold, door frame and bed frame at the lower end of the pile rack 2 are removed. Finally, the variable amplitude oil cylinder seat 10 is subjected to positioning welding and boring, the variable amplitude oil cylinder 10 is installed and supported to form a 47° angle with the horizontal plane, and the assembly work of the elephant trunk beam and the front hinge seat 11 of the pile rack 2 on the hull 1 is completed.

[0063] 1. Pile rack 2 parameters

[0064] 1.1 Pile rack 2 specifications: L (length) x B (width) x H (height) is 59545 mm x 8050 mm x 12867 mm, and the pile rack 2 weighs 157 t. Please refer to Figures 3 to 7 , and the pile rack 2 structure is as follows: ramp 21, sub-frame 22, outfitting 23, dragon mouth 24 and fixed pulley group 25.

[0065] The vertical position of the center of gravity 20a of the pile frame 2 is 1749 mm away from the hinge point 20e of the pile frame 2, the longitudinal position is 25475 mm away from the hinge point 20e of the pile frame 2, and the transverse position is 6 mm away from the center line of the mouth 24.

[0066] 2. Lifting the pile frame 2

[0067] 2.1 A first steel rope 31 with a diameter of Φ68 mm and a length of 26.2 meters is wound around the central axis of the 250t hook 30, and the two ends of the first steel rope 31 are connected to the lifting lugs of the two main lifting points 20b through 85t shackles respectively;

[0068] 2.2 Two second steel ropes 32 with a diameter of Φ68 mm and a length of 23.7 meters are hung on one side of the 250t hook 30, and the other ends are buckled on the lifting lugs of the two auxiliary lifting points 20c through 55t shackles respectively;

[0069] 2.3 The hook 30 is lifted, and the position of the gantry crane is adjusted so that the first steel rope 31 forms a 0 degree angle with the plumb line, at this time the first steel rope 31 is taut and slightly stressed, and the second steel rope 32 is in a relaxed state;

[0070] 2.4 The hook 30 is lifted steadily and slowly, when the force on the hook 30 is 93.04t, at this time the pile frame 2 is not stressed, the weight of the pile frame 2 is borne by the hook 30 and the support seat, and attention should be paid to the posture of the pile frame 2 and whether the support seat has any abnormality or sliding relative to the ground;

[0071] 2.5 The hook 30 continues to be lifted steadily and slowly by 1.155 meters, at this time the second steel rope 32 is taut and stressed, and the pile frame 2 rotates 3.6° around the dummy shaft seat 20d;

[0072] 2.6 The gantry crane moves northward at a uniform speed and slowly by 0.462 meters, the weight of the pile frame 2 is borne by the first steel rope 31, the second steel rope 32 and the support seat, there is no horizontal component force at the support seat, the hook 30 is lifted again by 0.359 meters, the weight of the pile frame 2 is borne by the first steel rope 31, the second steel rope 32 and the support seat, the pile frame 2 rotates 1.1° around the dummy shaft seat 20d, the hook 30 moves northward by 569 mm, and the posture of the pile frame 2 does not change;

[0073] 2.7 The hook 30 is lifted by 422 mm, the pile frame 2 rotates 1.4° around the support seat, and then moves northward by 561 mm, and the posture of the pile frame 2 does not change;

[0074] 2.8 Repeat the action of step 1.7 until the pile frame 2 forms a 20.9° angle with the horizontal plane, then the hook 30 is lifted by 188 mm, and then moves northward by 493 mm, and the pile frame 2 rotates 1° around the dummy shaft seat 20d;

[0075] 2.9 Repeat the action of step 1.8 until the pile frame 2 is at an angle of 26.9° to the horizontal, first drive the crane 479 mm north, lift the hook 30 by 128 mm, and rotate the pile frame 2 by 1° about the dummy pivot 20d;

[0076] 2.10 Drive the crane 477 mm north again, lift the hook 30 by 119 mm, lift the hook 102 mm again, and slide the pile frame 2 on the support seat by 440 mm, at which time the pile frame 2 is at an angle of 29.7° to the horizontal, and the pile frame 2 is entirely supported by the 250t hook 30;

[0077] 2.11 After the pile frame 2 is in a stable position, prepare to load it onto the ship.

[0078] 3. Loading the pile frame 2 onto the ship

[0079] 3.1 Slowly raise the hook 30 to a height of 46 m, and then slowly drive the crane south;

[0080] 3.2 Drive the gantry crane hook 30 east until the inclined surface at the tail end of the pile frame 2 is directly above the luffing cylinder 10, and the hook 30 is directly above the ship;

[0081] 3.3 Slowly adjust the position of the gantry crane hook 30 in the north-south direction so that the hook 30 is 26 m from the centerline of the front hinge seat 11, and then slowly lower the hook 30 by 5.5 m and drive the crane 3 m north, so that the hinge center of the pile frame 2 is directly above the front hinge seat 11 of the pile frame 2;

[0082] 3.4 Slowly lower the hook 30 by 3.5 m so that the front hinge of the pile frame 2 is inserted into the front hinge seat 11 of the pile frame 2, and use auxiliary components such as hand-operated hoists and jacks to complete the pinning work;

[0083] 3.5 After the pinning work at the two locations is completed, slowly lower the hook 30 by 198 mm, at which time the pile frame 2 rotates about the pin shaft, the steel wire rope of the gantry crane hook 30 is at an angle of 0.7° to the vertical, drive the crane 245 mm south to straighten the steel wire rope of the gantry crane, this set of actions rotates the pile frame 2 by 0.6° about the front hinge seat 11; lower the hook 30 by 297 mm again, and then drive the crane 360 mm south to straighten the steel wire rope of the gantry crane, at which time the pile frame 2 rotates by 0.7° about the front hinge seat 11, and when the hook 30 is lowered by 164 mm again, the pile frame 2 is stably placed on the shelf 1212;

[0084] 3.6 Release the steel wire rope, and the loading of the pile frame 2 is completed.

[0085] From the above implementation description, it can be known that compared with the prior art, the pile frame hoisting method provided by the application can realize the on-ship assembly work of the pile frame 2 by using only a single hook. In the hoisting process, the main lifting point 20b is used as a force point for adjusting the posture of the pile frame 2 during hoisting, so that the posture adjustment of the pile frame 2 is realized during the rotation of the pile frame 2 around the dummy shaft seat 20d. Compared with the multi-hook operation or the operation of multiple hoisting devices, the hoisting capacity of a medium or small shipyard can be adapted.

[0086] The above has described various embodiments of the application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A method of hoisting a pile tower, characterized in that, A pile frame is hoisted onto a ship body by a single-hook hoisting system, the pile frame is provided with an axle seat and a hinge point, and the ship body is provided with a luffing cylinder and a front hinge seat; An angle of hoisting of the pile frame is set as α, and an angle of erection of the luffing cylinder by the pile frame is set as β according to the α; A center of gravity of the pile frame is determined, two main hoisting points and two auxiliary hoisting points are arranged on the pile frame based on the center of gravity, the main hoisting points and the auxiliary hoisting points are connected to the single-hook hoisting system by steel ropes, a distance between the main hoisting points and the single-hook hoisting system is less than a distance between the main hoisting points and the auxiliary hoisting points, and a distance between the auxiliary hoisting points and the single-hook hoisting system is less than the distance between the main hoisting points and the single-hook hoisting system; The upper end of the pile frame is lifted by the single-hook hoisting system, the pile frame is rotated around the axle seat to an angle of α with a horizontal plane, and then is lifted and moved to above the luffing cylinder to align the hinge point with the front hinge seat; The pile frame comprises a slide, an auxiliary frame, fittings, a mouthpiece and a fixed pulley block, and the center of gravity of the pile frame is determined as follows: A three-dimensional coordinate of the slide, the auxiliary frame, the fittings, the mouthpiece and the fixed pulley block is established with the hinge point as a coordinate origin; A weight w1 of the slide is obtained, and a center of gravity coordinate (x1, y1, z1) of the slide is determined; A weight w2 of the auxiliary frame is obtained, and a center of gravity coordinate (x2, y2, z2) of the auxiliary frame is determined; A weight w3 of the fittings is obtained, and a center of gravity coordinate (x3, y3, z3) of the fittings is determined; A weight w4 of the mouthpiece is obtained, and a center of gravity coordinate (x4, y4, z4) of the mouthpiece is determined; A weight w5 of the fixed pulley block is obtained, and a center of gravity coordinate (x5, y5, z5) of the fixed pulley block is determined; The center of gravity coordinate (x, y, z) of the pile frame is calculated by a formula The load bearing of the main hoisting points and the auxiliary hoisting points is configured to be approximately evenly distributed.

2. Pile frame lifting method according to claim 1, characterized in that, The steel ropes comprise a first steel rope and a second steel rope, and an angle between the first steel rope and the second steel rope is less than 60° when the pile frame is in a hoisting state.

3. Pile frame lifting method according to claim 2, characterized in that, An angle between the first steel rope and a plumb line is 22°-29°, and an angle between the second steel rope and the plumb line is 24-31°.

4. A piling rack lifting method according to claim 3, characterised in that, The α is 44°-50°.

5. The piling frame lifting method according to claim 1, characterized in that, The α is 47°.

6. A piling rack lifting method according to claim 5, characterised in that, The β is 28°-31°.

7. The piling frame lifting method according to claim 1, characterized by The β is 29.7°.

8. A piling rack lifting method according to claim 7, characterised in that, The single-hook hoisting system is a gantry crane.

9. The piling frame lifting method according to any one of claims 1 to 8, characterized in that, ​

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