Pile frame hoisting method

Abstract

The invention relates to a pile frame hoisting method, and belongs to the technical field of ship manufacturing. The pile frame hoisting method comprises the steps that the hoisting angle of a pile frame is set to be alpha, and the erecting angle of a variable-amplitude oil cylinder is set to be beta according to alpha and the pile frame; the gravity center of the pile frame is determined, two main lifting points and two auxiliary lifting points are arranged on the pile frame, the main lifting points and the auxiliary lifting points are connected with a single-hook lifting system through steel ropes, and the distance between the main lifting points and the single-hook lifting system is smaller than the distance between the main lifting points and the auxiliary lifting points and smaller than the distance between the auxiliary lifting points and the single-hook lifting system; and the upper end of the pile frame is lifted through the single-hook hoisting system, and the pile frame rotates around the dummy shaft seat until the included angle alpha is formed between the pile frame and the horizontal plane and then is lifted and moved to the position above the variable-amplitude oil cylinder, so that a hinge point is aligned with the front hinge seat. According to the scheme, by designing the supporting angle of the variable-amplitude oil cylinder and the hoisting angle of the pile frame, posture adjustment of the pile frame is achieved through the main hoisting point, cooperation of the posture of the pile frame is achieved through the main hoisting point and the auxiliary hoisting point, and meanwhile the later hoisting problem of the oil cylinder is solved.

Description

Technical Field

[0001] The present application relates to the technical field of shipbuilding, and in particular to a pile frame hoisting method. Background Art

[0002] The installation of pile frames by pile-driving ships generally requires the use of two hooks of lifting equipment or multiple equipment to carry out the installation. However, small and medium-sized shipyards may have insufficient lifting equipment or limited lifting capacity, and usually need to rent lifting equipment to carry out the lifting of pile frames. However, the rental cost of these equipment is high, it takes a certain amount of time to enter the site, and it will occupy the site in the factory, which will undoubtedly increase unnecessary operating costs. Summary of the invention

[0003] In order to overcome the problems existing in the prior art, the main purpose of the present invention is to provide a pile frame hoisting method. By designing the hoisting angle of the pile frame and the erection angle of the cylinder, a single hook hoisting system is used to realize the lifting and posture adjustment of the pile frame, and at the same time, the problem of difficulty in later hoisting of the variable-length cylinder is solved.

[0004] The present application provides a pile frame hoisting method, which is used to hoist the pile frame onto a hull through a single hook hoisting system, wherein the pile frame is provided with a false shaft seat and a hinge point, and the hull is provided with a luffing oil cylinder and a front hinge seat;

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

[0006] Determine the center of gravity of the pile frame, and set two main lifting points and two auxiliary lifting points on the pile frame based on the center of gravity, wherein the main lifting points and the auxiliary lifting points are connected to a single hook lifting system through steel ropes, and the distance between the main lifting point and the single hook lifting system is smaller than the distance between the main lifting point and the auxiliary lifting point, and the distance between the auxiliary lifting point and the single hook lifting system;

[0007] The upper end of the pile frame is lifted by the single hook lifting system. After the pile frame is rotated around the false shaft seat to an angle of α with the horizontal plane, it is lifted and moved above the variable-length cylinder to align the hinge point with the front hinge seat.

[0008] In some embodiments, the load bearing of the primary suspension point and the secondary suspension point is configured to be substantially evenly distributed.

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

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

[0011] In some embodiments, the pile frame includes a slideway, a sub-frame, outfitting, a gantry and a fixed pulley block, and the center of gravity of the pile frame is determined specifically as follows:

[0012] Taking the hinge point as the coordinate origin, establish the three-dimensional coordinates of the slideway, sub-frame, outfitting, gantry and fixed pulley block;

[0013] Get the weight w1 of the slide and determine the coordinates of the center of gravity of the slide (x1, y1, z1);

[0014] Get the weight w2 of the sub-frame and determine the coordinates of the center of gravity of the sub-frame (x2, y2, z2);

[0015] Get the weight w3 of the outfitting and determine the coordinates of the center of gravity of the outfitting (x3, y3, z3);

[0016] Get the weight w4 of the dragon mouth and determine the center of gravity coordinates of the dragon mouth (x4, y4, z4);

[0017] Get the weight w5 of the fixed pulley group and determine the center of gravity coordinates (x5, y5, z5) of the fixed pulley group;

[0018] By formula

[0019]

[0020] The coordinates (x, y, z) of the center of gravity of the pile frame are calculated.

[0021] In some embodiments, the angle α is 44° to 50°.

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

[0023] In some embodiments, the β is 28° to 31°.

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

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

[0026] The technical solution provided by this application may have the following beneficial effects:

[0027] The pile frame hoisting method provided in the present application utilizes a single hook hoisting system to hoist the pile frame onto the hull, by setting two main hoisting points and auxiliary hoisting points on the pile frame, and designing the distance relationship between the main hoisting point, the auxiliary hoisting point and the single hook hoisting system so that the distance between the main hoisting point and the single hook hoisting system is smaller than the distance between the main hoisting point and the auxiliary hoisting point, and smaller than the distance between the auxiliary hoisting point and the single hook hoisting system, so that when the pile frame is in a suspended state, it can form a hoisting posture with an angle of α with the horizontal plane. Combined with the hoisting angle and structural layout of the pile frame, the variable-length oil cylinder is obliquely erected on the hull at an angle of β, so as to realize the synchronous hoisting of the pile frame and the variable-length oil cylinder, and solve the problem of difficulty in hoisting the variable-length oil cylinder in the later stage. In the case of a limited number of existing lifting equipment, the present invention only utilizes a single hook to complete the hoisting work of the pile frame, avoiding the need to rent other large-scale hoisting equipment, and has the advantages of low hoisting cost and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0029] Figure 1 It is a structural schematic diagram of a pile-driving ship shown in an embodiment of the present application;

[0030] Figure 2 is a structural schematic diagram of a hull shown in an embodiment of the present application;

[0031] Figure 3 is a schematic diagram of the structure of a pile frame shown in an embodiment of the present application;

[0032] Figure 4 It is a schematic diagram of the structure of the ladder and the railing shown in the embodiment of the present application;

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

[0034] Figure 6 is a schematic diagram of a state in which a part of a pile frame rotates around a false axle seat shown in an embodiment of the present application;

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

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

[0037] Fig. 9 is another schematic diagram of the hoisting of the pile frame shown in the embodiment of the present application;

[0038] Fig.10is another schematic diagram of hoisting of the pile frame shown in the embodiment of the present application;

[0039] Fig.11 This is another schematic diagram of hoisting of the pile frame shown in the embodiment of the present application.

[0040] 1. Hull; 10. Boom cylinder; 11. Front hinge seat; 12. Shelf;

[0041] 2. Pile frame; 20a. Center of gravity; 20b. Main lifting point; 20c. Auxiliary lifting point; 20d. False axle seat; 20e. Articulation point; 21. Slideway; 22. Auxiliary frame; 23. Outfitting; 24. Dragon mouth; 25. Fixed pulley block;

[0042] 3. Single hook lifting system; 30. 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 below with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0044] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to 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 lifting equipment. When multiple lifting equipment are used to hoist the pile frame, the lifting points and steel ropes on the pile frame can be set more freely, and the posture adjustment of the pile frame in the suspended state can be achieved through the hooks corresponding to different lifting points during hoisting, without the need to perform 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 equipment in the shipyard is insufficient to meet the hoisting operation of multiple lifting equipment, this scheme is proposed. The embodiment of the present application provides 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 uses a single hook hoisting system, while also solving the problem of difficulty in hoisting the variable-length oil cylinder in the later stage.

[0046] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

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

[0048] like Figures 1 to 11 As shown, the pile frame hoisting method provided in the embodiment of the present application is used to hoist the pile frame 2 onto the hull 1 through the single hook hoisting system 3, the pile frame 2 is provided with a dummy 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 frame 2 is set to α, and the erection angle of the variable amplitude cylinder 10 is set to β according to α and the pile frame 2;

[0050] Determine the center of gravity 20a of the pile frame 2, and set two main lifting points 20b and two auxiliary lifting points 20c on the pile frame 2 based on the center of gravity 20a, wherein the main lifting points 20b and the auxiliary lifting points 20c are connected to the single hook lifting system 3 through steel ropes, and the distance between the main lifting point 20b and the single hook lifting system 3 is smaller than the distance between the main lifting point 20b and the auxiliary lifting point 20c, and the distance between the auxiliary lifting point 20c and the single hook lifting system 3 is smaller than the distance between the auxiliary lifting point 20c and the single hook lifting system 3;

[0051] The upper end of the pile frame 2 is lifted by the single hook lifting system 3 , and the pile frame 2 is rotated around the false axle seat 20 d to an angle α with the horizontal plane, and then lifted and moved above the variable-length oil cylinder 10 to align the hinge point 20 e with the front hinge seat 11 .

[0052] In this embodiment, the pile frame 2 is hoisted to the top of the variable-length oil cylinder 10 by using the single hook hoisting system 3, and the pile frame 2 is slowly lowered so that the variable-length oil cylinder 10 passes through the tail end space of the pile frame 2. After the hinge point 20e of the pile frame 2 is aligned with the hinge seat of the hull 1, the pile frame 2 can be installed and fixed on the hull 1. When implementing the above technical solution, based on the particularity that the single hook hoisting system 3 cannot adjust the posture of the pile frame 2 during hoisting, this application sets the angle between the pile frame 2 and the horizontal plane to α in the hoisting state 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 portability of installation after hoisting. Based on the angle α, the motion trajectory of the tail end space is calculated. Under the premise of ensuring that the variable-length oil cylinder 10 and the pile frame 2 will not interfere with each other, the bracket fixing method is adopted so that the variable-length oil cylinder 10 can be erected on the hull 1 at an angle β. 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 determined by the geometric method and the coordinate system method. After the position of the center of gravity 20a of the pile frame 2 is determined, two or more main hoisting points 20b and auxiliary hoisting points 20c are set on the pile frame 2. After the lifting ears are installed at the main hoisting points 20b and the auxiliary hoisting points 20c, the hook 30 of the single hook hoisting system 3 can be connected by steel ropes. The main hoisting point 20b, the auxiliary hoisting point 20c and the hook 30 form a triangular structure. After the main hoisting point 20b and the auxiliary hoisting point 20c are determined, it can be determined that the angle between the connecting line of the main hoisting point 20b and the auxiliary hoisting point 20c and the horizontal plane is also α, but there are infinite combinations of the distance between the main hoisting point 20b and the hook 30 and the distance between the auxiliary hoisting point 20c and the hook 30, although these combinations can all achieve the hoisting state with the angle α. However, the original intention of the design of this application is to realize the single hook lifting 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, for example, 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 lifting system 3, the distance between the main lifting point 20b and the single hook lifting system 3 can be configured to be smaller than the distance between the main lifting point 20b and the auxiliary lifting point 20c, and the distance between the main lifting point 20b and the auxiliary lifting point 20c can be configured to be smaller than the distance between the auxiliary lifting point 20c and the single hook lifting system 3. When the posture of the pile frame 2 is adjusted, one end of the pile frame 2 is lifted through the main lifting point 20b. During the rotation of the pile frame 2 around the false axle seat 20d, the auxiliary lifting point 20c cooperates to keep the posture of the pile frame 2 stable. When the pile frame 2 rotates around the false axle seat 20d to an angle α with the horizontal plane, it is lifted and moved above the variable-length cylinder 10 to align the hinge point 20e with the front hinge seat 11, thereby realizing the lifting operation of the pile frame 2.After the single-hook lifting system 3 lifts the pile frame 2 through the main lifting point and the auxiliary lifting point, the center of gravity of the pile frame 2 and the hook 30 are located on the same plumb line. On the basis of configuring the distance between the main lifting point and the single-hook lifting system 3 to be smaller than the distance between the main lifting point and the auxiliary lifting point, and configuring the distance between the main lifting point and the auxiliary lifting point to be smaller than the distance between the auxiliary lifting point and the single-hook lifting system 3, the line between the main lifting point and the hook is defined as L1, the angle between L1 and the plumb line is defined as C1, the line between the auxiliary lifting point and the hook is defined as L2, the angle between L2 and the plumb line is C2, and in order to reduce the horizontal load on the hook 30, the main lifting point and the auxiliary lifting point, the load-bearing load of the main lifting point and the auxiliary lifting point is configured to be roughly evenly distributed, that is, C1 is roughly equal to C2. In some embodiments, the steel rope includes a first steel rope 31 and a second steel rope 32. When the pile frame is in a hoisting state, 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 is understandable 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 slideway 21, the sub-frame 22, the outfitting 23, the dragon mouth 24 and the fixed 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 solder generally accounts for 5% of the weight of the pile frame 2. Therefore, the calculated center of gravity 20a will have a slight offset, so it is difficult to achieve even load distribution in actual applications.

[0054] In the present embodiment, the single hook lifting system 3 is a gantry crane. Of course, a portal crane or a crawler crane can also be used alone. The angle of the pile frame 2 in the lifting posture is set to α, wherein α is 28°~31°, and in the present embodiment, α is preferably 29.7°. The luffing cylinder 10 is installed on the hull 1 at an inclination of β, and the vertical height of the luffing cylinder 10 is the length of the luffing cylinder 10×sin(β), wherein β is 44°~50°, and in the present embodiment, β is preferably 47°. Under this setting, it can be ensured that the pile frame 2 can be lowered from the top of the variable-length cylinder 10 to be aligned with the hinge point 20e, ensuring that the pile frame 2 will not collide with the variable-length cylinder 10. The relationship between α and β is positively correlated. When α is smaller, β is correspondingly smaller, so that the variable-length cylinder 10 can pass through the inclined surface space at the tail end of the pile frame 2. The lifting posture of the pile frame 2 is fixed. Therefore, when the single-hook lifting system 3 lifts the pile frame 2, the top of the variable-length cylinder 10 passes through the inclined surface space at the tail end of the pile frame 2. During the lifting process of the pile frame 2, the variable-length cylinder 10 will not collide with the inclined surface space at the tail end of the pile frame. The two main lifting points 20b and the two auxiliary lifting points 20c on the pile frame 2 are set 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 lifted by the main lifting points 20b and the auxiliary lifting points 20c together. In the case of a limited number of existing lifting equipment, the present invention can use a single hook 30 to complete the lifting work of the pile frame 2, avoiding the need to rent other large-scale lifting equipment, and has the advantages of low lifting cost and high efficiency.

[0055] The pile frame 2 is assembled from several structural parts, such as the slide 21, the sub-frame 22, the outfitting 23, the gantry 24 and the fixed pulley block 25. The slide 21, the sub-frame 22, the outfitting 23, the gantry 24, the fixed pulley block 25, the plug-in and pulley device and the channel steel are assembled according to the drawings, and the outfitting 23 includes the assembly and welding of each layer of platform, railing, cable parts and pipe fittings. Four lifting ears are welded on the two main lifting points 20b and the two auxiliary lifting points 20c, and finally the pile frame 2 and the outfitting 23 are painted. A support seat for supporting the pile frame 2 during lifting and rotation is set on the ground, and a pin hole is provided on the support seat, and a dummy shaft seat 20d is inserted in the pin hole. The dummy shaft seat 20d is connected to the pile frame 2 so that the pile frame 2 can rotate around the dummy shaft seat 20d. After completing the assembly of the pile frame 2, the mounting seat of the luffing cylinder 10 of the hull 1 is positioned, welded and bored, the luffing cylinder 10 is erected using a support frame, and then the elephant trunk beam and the front hinge seat 11 are assembled and welded on the hull 1, and the pin of the front hinge seat 11 is trial-assembled. After the trial assembly is qualified, the pin is pushed out a certain distance to ensure that the hinge point 20e of the pile frame 2 is aligned with the front hinge seat 11 before direct assembly. Auxiliary tools such as jacks and hand winches are prepared, and finally the equipment and scaffolding in the lifting operation area on board the ship are removed to ensure that the route for lifting the pile frame 2 onto the ship is unobstructed.

[0056] When designing the pile frame 2, the shipyard already knows the size and weight of each structural component. Therefore, when determining the center of gravity 20a of the pile frame 2, the coordinate system method can be used to determine the position of the center of gravity 20a of the pile frame 2. With a certain point of the pile frame 2 as the coordinate origin, the pile frame 2 is firstly three-dimensionally modeled to generate the three-dimensional coordinates of each structural component, and the position of the center of gravity 20a of each structural component is calculated, for example, the center of gravity coordinates (x1, y1, z1) of the slideway 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 fixed pulley 25 group, and then according to the following formula:

[0057]

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

[0059] In addition, in order to improve the accuracy of calculating the center of gravity 20a of the pile frame 2, irregular structural parts 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 aforementioned application function implementation method embodiment, the present application also provides an application example applied to the above-mentioned pile frame single hook lifting method, and the specific implementation process is as follows:

[0061] Preparation before lifting:

[0062] Additional pillows are provided at the front and rear of the hull 1, followed by boring of the sub-frame 22 and slideway 21 of the pile frame 2 and assembly and welding of the dragon mouth 24. Next, the outfitting 23 operation is performed, including the assembly and welding of each layer of platforms, railings, cable fittings and pipe fittings. After completing the welding and inspection process of the lifting lugs of the pile frame 2, the pile frame 2 and its outfitting 23 parts are painted. Then, the support seat for the lifting of the pile frame 2 is arranged, and the pile frame scaffolding, the door frame and the tire frame at the lower end of the pile frame 2 are removed. Finally, the boom cylinder seat 10 is positioned, welded and bored, the boom cylinder 10 is installed and supported to form an angle of 47° with the horizontal plane, and the assembly of the trunk beam and the front hinge seat 11 of the pile frame 2 is completed on the hull 1.

[0063] 1. Pile frame 2 parameters

[0064] 1.1 Specifications of pile frame 2: L (length) × B (width) × H (height) is 59545mm × 8050mm × 12867mm, and the weight of pile frame 2 is 157t. Please refer to Figures 3 to 7 The structure of the pile frame 2 is as follows: a slideway 21, a sub-frame 22, outfitting 23, a dragon mouth 24 and a fixed pulley block 25.

[0065] Based on the coordinate system method, it is calculated that the vertical position of the center of gravity 20a of the pile frame 2 is 1749mm away from the hinge point 20e of the pile frame 2, the longitudinal position is 25475mm away from the hinge point 20e of the pile frame 2, and the lateral position is 6mm away from the center line of the dragon mouth 24.

[0066] 2. Lifting of pile frame 2

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

[0068] 2.2 Hang one end of two second steel ropes 32 of Φ68mm and 23.7m in length on one side of the 250t hook 30, and buckle the other ends on the lifting ears of the two auxiliary lifting points 20c through 55t shackles;

[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 an angle of 0 degrees 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 raised slowly and steadily. When the force on the hook 30 reaches 93.04t, the tire frame under the pile frame 2 is not under force. The weight of the pile frame 2 is borne by the hook 30 and the support seat. Pay attention to whether the posture of the pile frame 2 and the support seat are abnormal or slip relative to the ground;

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

[0072] 2.6 The gantry crane moves northward at a constant speed and slowly for 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 force at the support seat. The hook 30 is slowly and steadily lifted again for 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 false axle seat 20d. The hook 30 moves northward for 569 mm. The posture of the pile frame 2 does not change.

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

[0074] 2.8 Repeat the action of step 1.7 until the pile frame 2 forms an angle of 20.9° with the horizontal plane, then the hook 30 is lifted 188mm, and then driven 493mm north, and the pile frame 2 is rotated 1° around the false axle seat 20d;

[0075] 2.9 Repeat the action of step 1.8 until the pile frame 2 forms an angle of 26.9° with the horizontal plane, first drive north 479mm, lift the hook 30 128mm, and the pile frame 2 rotates 1° around the false axle seat 20d;

[0076] 2.10 The vehicle travels north again by 477mm, the hook 30 is lifted by 119mm, and the hook is lifted again by 102mm. The pile frame 2 slides on the support seat by 440mm. At this time, the pile frame 2 is 29.7 degrees to the horizontal plane, and the weight of the pile frame 2 is fully borne by the 250t hook 30;

[0077] 2.11 After the pile frame 2 is in a stable position, it is ready for assembly on board.

[0078] 3. Pile frame 2 is assembled on board

[0079] 3.1 Slowly lift the hook to a height of 30 to 46 meters, and then drive slowly southward;

[0080] 3.2 The gantry crane hook 30 moves eastward until the inclined space at the tail end of the pile frame 2 is directly above the luffing cylinder 10, and the hook 30 is directly above the middle of the ship;

[0081] 3.3 Slowly adjust the north-south position of the gantry crane hook 30 so that the hook 30 is 26 meters away from the center line of the front hinge seat 11. The hook 30 slowly descends 5.5 meters and then drives 3 meters northward 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 The hook 30 slowly descends 3.5 meters, so that the front hinge of the pile frame 2 is inserted into the front hinge seat 11 of the pile frame 2, and the bolting work is completed by using auxiliary parts such as a hand chain hoist and a jack;

[0083] 3.5 After completing the bolting work at the two locations, the hook 30 slowly descends 198 mm, at which time the pile frame 2 rotates around the pin shaft, the steel wire rope of the gantry crane hook 30 forms an angle of 0.7 degrees with the plumb plane, the southbound vehicle 245 mm returns the steel wire rope of the gantry crane, and this set of actions the pile frame 2 rotates 0.6° around the front hinge seat 11; the hook 30 descends 297 mm again, and then the southbound vehicle 360 ​​mm returns the steel wire rope of the gantry crane, at which time the pile frame 2 rotates 0.7° around the front hinge seat 11, and when the hook 30 descends 164 mm again, the pile frame 2 is stably placed on the shelf 1212;

[0084] 3.6 Remove the wire rope to complete the assembly of the pile frame 2.

[0085] It can be seen from the above implementation description that compared with the prior art, the pile frame hoisting method provided by the present application can realize the onboard assembly of the pile frame 2 by only using a single hook. During the hoisting process, the main hoisting point 20b is used as the force point for the posture adjustment of the pile frame 2 during the hoisting process, so that the posture adjustment of the pile frame 2 is realized during the rotation of the pile frame 2 around the false axle seat 20d. Compared with the operation of multiple hooks or multiple lifting equipment, it can adapt to the hoisting capacity of medium and small shipyards.

[0086] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of 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 persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A pile frame hoisting method, characterized in that: Used to hoist the pile frame onto the hull through a single hook hoisting system, the pile frame is provided with a false shaft seat and a hinge point, and the hull is provided with a luffing cylinder and a front hinge seat; The hoisting angle of the pile frame is set to α, and the erection angle of the variable-length oil cylinder is set to β according to α and the pile frame; Determine the center of gravity of the pile frame, and set two main lifting points and two auxiliary lifting points on the pile frame based on the center of gravity, wherein the main lifting points and the auxiliary lifting points are connected to a single hook lifting system through steel ropes, and the distance between the main lifting point and the single hook lifting system is smaller than the distance between the main lifting point and the auxiliary lifting point, and the distance between the auxiliary lifting point and the single hook lifting system; The upper end of the pile frame is lifted by the single hook lifting system. After the pile frame is rotated around the false shaft seat to an angle of α with the horizontal plane, it is lifted and moved above the variable-length cylinder to align the hinge point with the front hinge seat.

2. The pile frame hoisting method according to claim 1, characterized in that: The load bearing capacity of the main suspension points and the auxiliary suspension points is configured to be approximately evenly distributed.

3. The pile frame hoisting method according to claim 2, characterized in that: The steel rope comprises a first steel rope and a second steel rope. When the pile frame is in a hoisting state, the angle between the first steel rope and the second steel rope is less than 60°.

4. The pile frame hoisting method according to claim 3, characterized in that: The included angle between the first steel rope and the plumb line is 22° to 29°, and the included angle between the second steel rope and the plumb line is 24° to 31°.

5. The pile frame hoisting method according to claim 1, characterized in that: The pile frame includes a slideway, a sub-frame, outfitting, a gantry and a fixed pulley block. The center of gravity of the pile frame is determined as follows: Taking the hinge point as the coordinate origin, establish the three-dimensional coordinates of the slideway, sub-frame, outfitting, gantry and fixed pulley block; Get the weight w1 of the slide and determine the coordinates of the center of gravity of the slide (x1, y1, z1); Get the weight w2 of the sub-frame and determine the coordinates of the center of gravity of the sub-frame (x2, y2, z2); Get the weight w3 of the outfitting and determine the coordinates of the center of gravity of the outfitting (x3, y3, z3); Get the weight w4 of the dragon mouth and determine the center of gravity coordinates of the dragon mouth (x4, y4, z4); Get the weight w5 of the fixed pulley group and determine the center of gravity coordinates (x5, y5, z5) of the fixed pulley group; By formula The coordinates (x, y, z) of the center of gravity of the pile frame are calculated.

6. The pile frame hoisting method according to claim 1, characterized in that: The α is 44° to 50°.

7. The pile frame hoisting method according to claim 6, characterized in that: The α is 47°.

8. The pile frame hoisting method according to claim 1, characterized in that: The β is 28° to 31°.

9. The pile frame hoisting method according to claim 8, characterized in that: The β is 29.7°.

10. The pile frame hoisting method according to any one of claims 1 to 9, characterized in that: The single hook lifting system is a gantry crane.

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