Method for dismounting a crane boom

Abstract

The application discloses a crane boom dismounting method and belongs to the technical field of engineering machinery. The method comprises the following steps: locking the lifting steel wire rope connected with a hook on a tower crane on a crane boom; jointly lifting down the crane boom together with the lifting steel wire rope, and synchronously releasing the lifting steel wire rope through a lifting mechanism of the tower crane during the lifting down process. The crane boom dismounting method disclosed by the application integrally dismounts the crane boom and the hook, saves time and effort, improves the dismounting efficiency, is applied to a wind field, and can greatly shorten the time of wind field transfer and greatly improve the work efficiency. Moreover, through the integral dismounting, the position of the hook falling on the ground can be accurately controlled, the safety is better, and the occurrence of safety accidents is avoided.

Description

Technical Field

[0001] This application relates to the field of engineering machinery technology, and more specifically, to a method for disassembling a crane boom. Background Technology

[0002] Wind turbine tower cranes, often used for wind turbine installation, are large luffing jib cranes. The luffing jib of a luffing jib crane can be luffed; the luffing mechanism rotates, and the luffing wire rope pulls the luffing rod to change the jib's amplitude. Since there are many wind turbines in a wind farm, wind turbine tower cranes need to be constantly moved, requiring frequent disassembly and reassembly of the jib and hook. However, as wind turbine power increases, the lifting capacity of luffing jib cranes also increases, making the jib and hook larger and heavier. This results in disassembling the jib and hook becoming a time-consuming and labor-intensive process.

[0003] For information on disassembling the boom and hook of a luffing tower crane, please refer to [link / reference needed]. Figure 1 The usual procedure is to first lower the hook to the ground, and then use a crane to remove the boom. Since the boom is at least 40 meters above the ground, the hoisting mechanism needs to slowly reel in the rope while the auxiliary crane lowers the boom until the boom is lowered to the ground. Then the wire rope between the boom and the hook is removed, and the hook is removed. The entire dismantling process is then complete.

[0004] Therefore, the existing dismantling method requires separating the hook from the boom, which is time-consuming and labor-intensive. Furthermore, the position of the hook is uncontrollable during dismantling, and the hook may be pulled down when the hoisting mechanism retracts the rope, posing a safety hazard. Summary of the Invention

[0005] The purpose of this application is to provide a method for disassembling a crane boom to address the shortcomings of existing technologies.

[0006] To achieve the above objectives, this application provides a method for disassembling a crane boom, the method comprising:

[0007] Lock the hoisting wire rope connected to the hook on the tower crane to the boom;

[0008] The crane boom and the hoisting wire rope are lifted and lowered together, and the hoisting wire rope is released synchronously through the hoisting mechanism of the tower crane during the lifting and lowering process.

[0009] As a further improvement to the above technical solution:

[0010] In one possible implementation, the lifting wire rope is locked to the end of the lifting boom near the hook.

[0011] In one possible implementation, at least one locking device is provided on the jib, and the hoisting wire is locked to the jib by the at least one locking device.

[0012] In one possible implementation, the locking device comprises:

[0013] a bottom plate provided on the jib;

[0014] a pressing plate detachably provided on the bottom plate by a fastener, and a space for clamping the hoisting wire is formed between the pressing plate and the bottom plate.

[0015] In one possible implementation, the locking of the hoisting wire connected to the hook on the tower crane to the jib comprises:

[0016] preparing the locking device;

[0017] placing the hoisting wire between the pressing plate and the bottom plate;

[0018] clamping the hoisting wire by tightening the fastener.

[0019] In one possible implementation, the side opposite to the pressing plate of the bottom plate is provided with a wear pad for protecting the hoisting wire.

[0020] In one possible implementation, the hoisting and lowering of the jib together with the hoisting wire, and the synchronous release of the hoisting wire by the hoisting mechanism of the tower crane during the hoisting and lowering further comprises:

[0021] removing the luffing pull rod on the jib;

[0022] removing the connecting pin shaft between the jib and the counter jib of the tower crane.

[0023] In one possible implementation, the removing of the luffing pull rod on the jib comprises:

[0024] connecting the jib to the tower cap of the tower crane by a mounting rope;

[0025] removing the luffing pull rod;

[0026] removing the mounting rope.

[0027] In one possible implementation, the hoisting and lowering of the jib together with the hoisting wire, and the synchronous release of the hoisting wire by the hoisting mechanism of the tower crane during the hoisting and lowering further comprises:

[0028] releasing the locking of the hoisting wire;

[0029] remove the lifting wire rope from the hook.

[0030] In a possible implementation, the method further comprises winding the lifting wire rope by the lifting mechanism after the lifting wire rope is removed from the hook.

[0031] Compared with the prior art, the present application has the following advantages:

[0032] The present application provides a method for disassembling a lifting arm, which comprises the following steps: locking a lifting wire rope connected with a hook on a tower to a lifting arm to limit the falling of the hook when disassembling the lifting arm; and synchronously releasing the lifting wire rope by a lifting mechanism during the lifting and lowering of the lifting arm to avoid the interference of the lifting wire rope with the lowering of the lifting arm. Since the lifting wire rope is locked to the lifting arm, the length of the lifting wire rope from the locking position to the hook is fixed, so that the hook is always suspended directly below the lifting arm during the lowering of the lifting arm. Even if the lifting mechanism releases the lifting wire rope, the hook will not freely fall, and thus the hook will always be kept directly below the lifting arm and fall together with the lifting arm. Therefore, the disassembly of the lifting arm and the hook is integrated, time and labor are saved, and the disassembly efficiency is improved. The method is applied to a wind field, and the time for the wind field to be transferred is greatly shortened, and the work efficiency is greatly improved. In addition, the integrated disassembly of the lifting arm and the hook can ensure that the hook is kept directly below the lifting arm during the disassembly, so that the position of the hook on the ground can be accurately controlled, the safety is better, and the occurrence of safety accidents is avoided.

[0033] Other features and advantages of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following detailed description to explain the present application. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as a limitation on the scope, and other related drawings can be obtained by those skilled in the art without creative labor. In the drawings:

[0035] Figure 1 A structure schematic diagram of disassembling a lifting arm and a hook of a wind power arm tower in the prior art is shown;

[0036] Figure 2 A schematic diagram of a method for disassembling a lifting arm provided by an embodiment of the present application is shown;

[0037] Figure 3 A structure schematic diagram of the separation of a lifting arm and a tower body during the disassembly process of a method for disassembling a lifting arm provided by an embodiment of the present application is shown;

[0038] Figure 4 A flow chart of a method for disassembling a lifting arm is shown in the embodiments of the present application;

[0039] Figure 5 A sectional view of a locking device is provided in the embodiments of the present application;

[0040] Figure 6 A schematic diagram showing the arrangement of the lifting arm and the lifting hook when falling to the ground is shown in the embodiments of the present application;

[0041] Figure 7 A flow chart of locking the hoisting wire rope on the lifting arm in the method for disassembling the lifting arm is shown in the embodiments of the present application;

[0042] Figure 8 A schematic diagram showing the arrangement of the lifting arm and the lifting hook when removing the hoisting wire rope from the lifting hook is shown in the embodiments of the present application;

[0043] Figure 9 A flow chart of releasing the lifting arm from the tower body in the method for disassembling the lifting arm is shown in the embodiments of the present application;

[0044] Figure 10 A flow chart of removing the luffing pull rod from the lifting arm in the method for disassembling the lifting arm is shown in the embodiments of the present application;

[0045] Figure 11 A flow chart of removing the hoisting wire rope in the method for disassembling the lifting arm is shown in the embodiments of the present application.

[0046] Explanation of reference signs:

[0047] 10, ground lifting device;

[0048] 100, tower body; 110, base; 120, standard section; 130, climbing frame; 140, slewing assembly; 150, balance arm; 160, counterweight; 170, tower cap; 200, lifting arm; 210, arm tip section; 300, lifting hook; 400, luffing mechanism; 410, luffing pull rod; 500, hoisting mechanism; 510, hoisting wire rope; 600, locking device; 610, base plate; 620, pressing plate; 630, fastener; 640, wear pad; 700, connecting pin. DETAILED DESCRIPTION

[0049] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0050] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0051] In the embodiments of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0052] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0053] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] The present application will be described in detail below with reference to the accompanying drawings and in combination with exemplary embodiments.

[0055] Embodiment one

[0056] Please refer to Figure 2 The present embodiment provides a method for dismounting a lifting arm, in particular to a method for dismounting a lifting arm of a tower crane, which can be used for the dismounting of a wind power arm tower crane in a wind field where a wind turbine is located, and of course can also be used for the dismounting of a tower crane in the field of construction.

[0057] Please refer to Figure 1 and Figure 2 Large tower crane (hereinafter referred to as tower crane) includes tower body 100, lifting arm 200, hook 300, luffing mechanism 400 and hoisting mechanism 500. Among them, the tower body 100 includes base 110, standard section 120, climbing frame 130, slewing assembly 140, balance arm 150 and counterweight 160.

[0058] It can be understood that a wind farm usually arranges multiple wind power generators, and the disassembly of each wind power generator needs to be hoisted by a tower crane. However, not every wind power generator is equipped with a tower crane. Therefore, when the hoisting of a wind power generator is completed, the wind power arm tower crane needs to be transferred to another wind power generator for hoisting, that is, the crane needs to be transferred, and the crane needs to be disassembled during the transfer.

[0059] With the increasing power of the wind turbine, the lifting performance of the tower crane in the wind farm will also be higher, so that the lifting arm 200 and the hook 300 of the tower crane will be larger and heavier. Therefore, disassembling the lifting arm 200 and the hook 300 will also be a time-consuming and laborious project. However, in the existing disassembly method, the hook 300 needs to be disassembled separately from the lifting arm 200, which is time-consuming and laborious. Moreover, during the disassembly process, the placement position of the hook 300 is uncontrollable, and when the hoisting mechanism 500 winds the hoisting steel wire rope 510, the hook 300 is easily pulled down, which has a safety hazard.

[0060] Please refer to Figure 2 , Figure 3 and Figure 4 , to solve the above problems, the disassembly method of the lifting arm provided by the embodiment comprises the following steps:

[0061] S100: Lock the hoisting steel wire rope 510 connected with the hook 300 on the tower crane on the lifting arm 200.

[0062] Specifically, first, connect the lifting arm 200 with the ground hoisting device 10, and lock the hoisting steel wire rope 510 connected with the hook 300 on the lifting arm 200, so as to limit the falling of the hook 300.

[0063] Among them, the ground hoisting device 10 can be selected as a truck crane. The truck crane is supported on the ground, and then the lifting arm is extended, so that the height of the lifting arm is higher than that of the lifting arm 200, and then the lifting arm 200 is connected with the lifting hook on the lifting arm of the truck crane through the steel wire rope or the lifting belt.

[0064] The step of locking the hoisting steel wire rope 510 on the lifting arm 200 can be performed after the lifting arm 200 is connected with the lifting arm, which can improve the safety of the operation. By locking the hoisting steel wire rope 510 on the lifting arm 200, the section from the locking position to the connection of the hoisting mechanism 500 is movable, and the section connected with the hook 300 is locked. Therefore, the hook 300 is suspended directly below the lifting arm 200, so that the hook 300 will not freely fall and rise due to the winding and unwinding of the hoisting steel wire rope 510 by the hoisting mechanism 500.

[0065] Please refer to Figure 3Further, the locking position of the hoisting wire rope 510 is located at the end of the hoisting arm 200 close to the hook 300, i.e., at the arm tip joint 210 of the hoisting arm 200. Further, the locking position is located at the tip of the arm tip joint 210, so as to reduce the length of the section of the hoisting wire rope 510 from the locking position to the hook 300, reduce the swing range of the hook 300 during the dismounting of the hoisting arm 200, and improve the safety.

[0066] In order to reduce the swing of the hook 300, before locking the hoisting wire rope 510, the hoisting mechanism 500 can be started to wind the hoisting wire rope 510, so as to lift the hook 300, so that the hook 300 is closer to the hoisting arm 200, and then the hoisting wire rope 510 is locked on the hoisting arm 200 after the hook 300 is lifted by a preset height. Of course, a certain movement allowance needs to be reserved between the hook 300 and the hoisting arm 200, so as to facilitate the adjustment of the placement positions of the hoisting arm 200 and the hook 300 after landing.

[0067] S200: jointly hoist and lower the hoisting arm 200 together with the hoisting wire rope 510, and release the hoisting wire rope 510 synchronously through the hoisting mechanism 500 of the tower crane during the hoisting and lowering.

[0068] Specifically, the hoisting arm 200 is hoisted by the truck crane, and the hoisting arm 200 is slowly lowered, and the hoisting wire rope 510 is slowly released through the hoisting mechanism 500, so that the hoisting wire rope 510 does not interfere with the hoisting arm 200 during the lowering, and the hook 300 is always kept below the hoisting arm 200, so that the hoisting arm 200 is safely landed on the ground. After the hoisting arm 200 is landed on the ground, the connection between the truck crane and the hoisting arm 200 is dismounted.

[0069] The hoisting arm dismounting method provided in the embodiment can lock the hoisting wire rope 510 connected with the hook 300 on the tower crane on the hoisting arm 200 during the dismounting of the hoisting arm 200, so as to limit the falling of the hook 300. During the hoisting and lowering of the hoisting arm 200, the hoisting wire rope 510 is synchronously released through the hoisting mechanism 500, so as to avoid the interference of the hoisting wire rope 510 with the hoisting arm 200 during the lowering of the hoisting arm 200. Since the hoisting wire rope 510 is locked on the hoisting arm 200, the length of the section of the hoisting wire rope 510 from the locking position to the hook 300 is fixed, so that the hook 300 is always hung below the hoisting arm 200 during the lowering of the hoisting arm 200. Even if the hoisting mechanism 500 releases the hoisting wire rope 510, the hook 300 will not freely fall, so the hook 300 will always be kept below the hoisting arm 200 and will fall together with the hoisting arm 200. Thus, the integrated dismounting of the hoisting arm 200 and the hook 300 is realized, time and labor are saved, the dismounting efficiency is improved, and the method is applied to the wind field, so that the time for the wind field to change the site is greatly shortened, and the work efficiency is greatly improved.

[0070] Further, by removing the hoisting arm 200 integrally with the hook 300, the hook 300 can be ensured to be kept directly below the hoisting arm 200 during the dismounting process, so that the position of the hook 300 falling on the ground can be accurately controlled, the safety is better, and the occurrence of safety accidents is avoided.

[0071] Embodiment Two

[0072] Please refer to Figure 2 , Figure 4 , Figure 5 and Figure 7 , the embodiment provides a hoisting arm dismounting method. The embodiment is an improvement on the technology of the above-mentioned embodiment one, and compared with the above-mentioned embodiment one, the difference lies in that:

[0073] Please refer to Figure 2 and Figure 5 , in the embodiment, the locking device 600 is used to lock the hoisting wire rope 510 on the hoisting arm 200.

[0074] Specifically, at least one locking device 600 is arranged on the hoisting arm 200, and the locking device 600 is arranged on the arm tip joint 210 of the hoisting arm 200. The locking device 600 is located on the side of the arm tip joint 210 away from the ground.

[0075] Optionally, the number of the locking device 600 can be one, two, three, four, five or other numbers. It should be understood that the above is only an example and does not limit the protection scope of the present application. Therefore, in the embodiment, the number of the locking device 600 is not limited.

[0076] Further, the locking device 600 comprises a bottom plate 610, a pressing plate 620 and a fastener 630.

[0077] The bottom plate 610 is arranged on the arm tip joint 210 of the hoisting arm 200, and can be fixed on the hoisting arm 200 by welding or bolt connection and the like. The pressing plate 620 is detachably arranged on the bottom plate 610 by the fastener 630, and a space for clamping the hoisting wire rope 510 is formed between the pressing plate 620 and the bottom plate 610. When the hoisting wire rope 510 is placed between the pressing plate 620 and the bottom plate 610, the pressing plate 620 and the bottom plate 610 can clamp the hoisting wire rope 510 by the fastening action of the fastener 630, so as to lock the hoisting wire rope 510 on the hoisting arm 200.

[0078] Please refer to Figure 4 , Figure 5 and Figure 7 , thus, in step S100 of the embodiment one, the method for locking the hoisting wire rope 510 connected with the hook 300 on the tower crane on the hoisting arm 200 comprises the following steps:

[0079] S110: Preparing the locking device 600.

[0080] Specifically, if the base plate 610 is welded on the hoist arm 200, only the fastener 630 and the pressing plate 620 need to be prepared. If the base plate 610 needs to be assembled with the hoist arm 200, the base plate 610, the pressing plate 620 and the fastener 630 need to be prepared.

[0081] Further, the fastener 630 can be selected as a bolt.

[0082] In some embodiments, the base plate 610 can also be installed before the hoist arm 200 is disassembled. If the base plate 610 is not installed in advance, the base plate 610 can be installed on site. If the fastener 630 and the pressing plate 620 remain on the base plate 610, the fastener 630 and the pressing plate 620 are removed first.

[0083] S120: Placing the hoisting wire rope 510 between the pressing plate 620 and the base plate 610.

[0084] Specifically, the pressing plate 620 is placed above the base plate 610, and the hoisting wire rope 510 is located between the pressing plate 620 and the base plate 610, and is threaded into the fastener 630.

[0085] S130: Clamping the hoisting wire rope 510 by tightening the fastener 630.

[0086] Further, in this embodiment, wear-resistant pads 640 for protecting the hoisting wire rope 510 are arranged on the side of the base plate 610 opposite to the pressing plate 620. The wear-resistant pads 640 can prevent the hoisting wire rope 510 from being crushed and increase the friction during clamping, so as to better lock the hoisting wire rope 510.

[0087] Optionally, the wear-resistant pads 640 are selected as special cast nylon pads. The product model of the special cast nylon pad is ZG270-500, and the manufacturer is Meilin Machinery Manufacturing Co., Ltd. in Yiyang City.

[0088] Embodiment Three

[0089] Please refer to Figures 2 to 11 , the present embodiment provides a hoist arm disassembly method. The present embodiment is an improvement on the technology of the above-mentioned embodiment one or embodiment two. Compared with the above-mentioned embodiment one or embodiment two, the difference lies in that:

[0090] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 9In the embodiment, before the step S200 in the above-mentioned embodiment one, the crane boom 200 is lowered together with the hoisting wire rope 510, and during the lowering, the hoisting mechanism 500 of the tower crane is used to release the hoisting wire rope 510 synchronously, and the crane boom 200 is separated from the tower body 100. Specifically, the step S200 includes the following steps:

[0091] S210: The amplitude pull rod 410 on the crane boom 200 is removed.

[0092] S220: The connecting pin 700 between the crane boom 200 and the balance arm 150 of the tower crane is removed, so that the crane boom 200 is separated from the tower body 100.

[0093] Please refer to Figure 10 Specifically, the step S210 of removing the amplitude pull rod 410 on the crane boom 200 includes the following steps:

[0094] S211: The crane boom 200 is connected to the tower cap 170 of the tower body 100 through a mounting rope (not shown in the figure). It can be understood that the mounting rope can bear the tension of the crane boom 200, and at the same time, the crane boom 200 is hoisted by the truck crane to improve safety and facilitate the execution of the step S212.

[0095] S212: The amplitude pull rod 410 is removed.

[0096] S213: The mounting rope is removed. Since the connecting pin 700 and the mounting rope have not been removed, when the safety rope is removed, the truck crane can only hoist the crane boom 200, but cannot hoist the crane boom 200.

[0097] In the steps S212 and S213, the removed amplitude pull rod 410 and the mounting rope are placed on the crane boom 200 together, and the crane boom 200 is lowered to the ground.

[0098] Please refer to Figure 5 and Figure 11 In the embodiment, after the step S200 in the above-mentioned embodiment one, the crane boom 200 is lowered together with the hoisting wire rope 510, and during the lowering, the hoisting mechanism 500 of the tower crane is used to release the hoisting wire rope 510, the step S200 further includes the following steps:

[0099] S230: The hoisting wire rope 510 is unlocked.

[0100] Specifically, when the hoisting wire rope 510 is removed, the fastener 630 and the pressing plate 620 are removed, so that the locking device 600 is unlocked. If the bottom plate 610 is detachably connected to the crane boom 200, the bottom plate 610 can also be removed.

[0101] S240: remove the hoisting wire rope 510 from the hook 300.

[0102] Wherein, by removing the hoisting wire rope 510 from the hook 300, the hook 300 is separated from the hoist arm 200, so that the hook 300, the hoisting wire rope 510 and the hoist arm 200 can be independently transported and transferred, which is more convenient. And step S240, after step S230, is to ensure that the hoisting wire rope 510 has enough activity, so that the disassembly is more convenient and fast.

[0103] Please refer to Figure 6 and Figure 8 , further. After the hoist arm 200 and the hook 300 fall to the ground, the hook 300 is placed in front of the hoist arm 200 along the length direction, so as to facilitate the removal of the hoisting wire rope 510. Thus, when removing the hoisting wire rope 510 on the hook 300, the hook 300 is first laid down in front of the hoist arm 200 along the length direction, and then the hoisting wire rope 510 wound on the hook 300 is removed.

[0104] S250: winding the hoisting wire rope 510 by the hoisting mechanism 500. Specifically, the hoisting mechanism 500 is started to wind the removed wire rope, thereby completing the integrated disassembly of the hoist arm 200 and the hook 300. After disassembly, the hoist arm 200 can be further disassembled, and then the hook 300 is loaded for transfer installation. Thus, the disassembly process is time-saving and labor-saving, safe and efficient.

[0105] Further, the embodiment also provides a disassembly method of a wind power mobile crane, which comprises the above-mentioned method of integrated disassembly of the hoist arm 200 and the hook 300. When the disassembly of the hoist arm 200 and the hook 300 is completed, the tower body 100 can be disassembled.

[0106] The hoist arm disassembly method provided by the embodiment has the following advantages compared with the existing disassembly method:

[0107] 1. The integrated disassembly method of the hook 300 and the hoist arm 200 solves the problem of time-consuming and labor-intensive of the traditional disassembly method;

[0108] 2. The integrated disassembly method of the hook 300 and the hoist arm 200 solves the problem that the hoisting wire rope 510 easily pulls down the hook 300 standing on the ground, causing danger;

[0109] 3. The integrated disassembly method of the hook 300 and the hoist arm 200 greatly improves the disassembly speed, shortens the transfer time, and solves the problems of time and labor cost.

[0110] The optional embodiments of the application are described in detail above in combination with the drawings, but the application is not limited to the specific details in the above-described embodiments. Within the technical concept of the application, various simple modifications can be made to the technical solutions of the application, and these simple modifications all belong to the protection scope of the application.

[0111] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the application.

[0112] In addition, various different embodiments of the application can be combined in any appropriate manner, as long as they do not contradict the idea of the application, and they should also be considered as disclosed by the application.

Claims

1. A method of disassembling a crane boom, characterized in that, The application relates to a method for dismounting a wind power mobile crane, which comprises the following steps: locking a lifting wire (510) connected with a hook (300) on a tower crane to a lifting arm (200); hoisting and lowering the lifting arm (200) together with the lifting wire (510), and synchronously releasing the lifting wire (510) through a lifting mechanism (500) of the tower crane during hoisting and lowering.

2. The method according to claim 1, characterized in that locking the lifting wire (510) to one end of the lifting arm (200) close to the hook (300).

3. The method according to claim 1, wherein providing at least one locking device (600) on the lifting arm (200), and locking the lifting wire (510) to the lifting arm (200) through the at least one locking device (600).

4. The method according to claim 3, characterized in that the locking device (600) comprises: a bottom plate (610) provided on the lifting arm (200); a pressing plate (620) detachably provided on the bottom plate (610) through a fastener (630), and a space for clamping the lifting wire (510) being formed between the pressing plate (620) and the bottom plate (610).

5. The method according to claim 4, characterized in that the step of locking the lifting wire (510) connected with the hook (300) on the tower crane to the lifting arm (200) comprises: preparing the locking device (600); placing the lifting wire (510) between the pressing plate (620) and the bottom plate (610); clamping the lifting wire (510) by tightening the fastener (630).

6. The method according to claim 4, wherein the side, opposite to the pressing plate (620), of the bottom plate (610) is provided with a wear-resistant pad (640) for protecting the lifting wire (510).

7. The method according to claim 4, wherein the step of hoisting and lowering the lifting arm (200) together with the lifting wire (510), and synchronously releasing the lifting wire (510) through the lifting mechanism (500) of the tower crane during hoisting and lowering further comprises: removing a luffing pull rod (410) on the lifting arm (200); removing a connecting pin (700) between the lifting arm (200) and a balance arm (150) of the tower crane.

8. The method according to claim 7, characterized in that the step of removing the luffing pull rod (410) on the lifting arm (200) comprises: connecting the lifting arm (200) to a tower cap (170) of the tower crane through a mounting rope; removing the luffing pull rod (410); removing the mounting rope.

9. The method of claim 1, wherein the step of hoisting and lowering the lifting arm (200) together with the lifting wire (510), and synchronously releasing the lifting wire (510) through the lifting mechanism (500) of the tower crane during hoisting and lowering further comprises: unlocking the lifting wire (510); removing the lifting wire (510) from the hook (300).

10. The method according to claim 9, characterized in that the step of removing the lifting wire (510) from the hook (300) further comprises winding the lifting wire (510) through the lifting mechanism (500).

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