Combined lifting hook for tower crane

Abstract

The utility model provides a combined lifting hook for a tower crane, which comprises a first lifting hook and a second lifting hook, a first lifting hook pulley is arranged on the first lifting hook, and the first lifting hook pulley can be connected with a first power unit positioned on the ground through a first steel wire rope; two groups of second lifting hook pulleys are respectively arranged on two sides of the second lifting hook and can be respectively connected with a second power unit arranged on the cabin through two second steel wire ropes; a connecting plate is arranged at the top of the first lifting hook, an inserting plate is arranged below the second lifting hook, and the second lifting hook and the first lifting hook are connected into a combined lifting hook through a bolt mechanism penetrating through the connecting plate and the inserting plate; the second power unit loosens or tightens the second steel wire rope to achieve lowering or lifting of the combined lifting hook. The second lifting hook is connected with the first lifting hook to form the combined lifting hook, and the combined lifting hook is driven by the second power unit arranged in the cabin to perform lifting operation, so that the lifting process is not influenced by sea waves.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power generation, and in particular relates to a combined hook for a tower crane. Background Art

[0002] With the increasing installed capacity of wind turbines and the increasing service life of wind turbines, wind turbines need to replace parts, especially blades. Wind turbines include a tower fixed to the ground, a nacelle installed on the top of the tower, a hub installed on the nacelle, and blades installed on the hub. At present, it is a relatively economical method to replace blades using a tower crane installed on the nacelle. The tower crane includes a hook, a boom, a base, a wire rope and a power unit. When the tower crane is used, one end of the wire rope is connected to the hook and the other end is connected to the power unit installed on the ground after passing through multiple pulleys installed on the boom and the base. The wire rope is tightened or loosened by the power unit to achieve lifting. When the tower crane is used for offshore wind turbines, the power unit is installed on the plywood of the transport ship. When the wind and waves are strong, the power unit fluctuates with the hull, affecting the stability of the lifting.

[0003] Therefore, it is necessary to provide a combined hook for the tower crane. Utility Model Content

[0004] The utility model provides a combined hook for a tower crane, wherein a second hook is arranged to connect with a first hook to form a combined hook, a second hook pulley, a second main lifting pulley and a second power unit arranged on a cabin of the second hook are connected through a second steel wire rope, and the combined hook is driven by the second power unit to perform a lifting operation, so that the lifting process is not affected by sea waves.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions.

[0006] A combined hook for a tower crane, comprising a first hook and a second hook, wherein the first hook is provided with a first hook pulley, and the first hook pulley can be connected to a first power unit located on the ground through a first steel wire rope; two groups of second hook pulleys are respectively provided on both sides of the second hook, and the two groups of second hook pulleys can be connected to a second power unit arranged on the nacelle through two second steel wire ropes respectively;

[0007] A connecting plate is provided on the top of the first hook, and a connecting groove is provided on the connecting plate. A plug-in plate is provided below the second hook. The plug-in plates are two pieces, and an insertion groove for allowing the connecting plate to be inserted is formed between the two plug-in plates. A connecting hole is provided on the plug-in plate, and a latch mechanism can be provided in the connecting hole. When the connecting plate is inserted into the insertion groove and the connecting hole is provided correspondingly to the connecting groove, the second hook is connected to the first hook through the latch mechanism passing through the connecting hole and the connecting groove to form a combined hook.

[0008] When the first power unit loosens the first steel wire rope, the second power unit loosens or tightens the second steel wire rope to lower or lift the combined hook.

[0009] Preferably, the second hook includes a hook frame, a guide block is arranged at the center of the hook frame, the plug plate is arranged below the guide block, and two groups of the second hook pulleys are respectively arranged on both sides of the hook frame; a plurality of wire rope guide grooves are vertically arranged on both side surfaces of the guide block, and the wire rope guide grooves allow the first wire rope to pass through.

[0010] Preferably, the connecting groove is a vertically arranged waist-shaped groove, the connecting hole is a circular hole, and the width of the connecting groove matches the diameter of the connecting hole.

[0011] Preferably, the bottom ends of the two plug boards are bent away from each other, and a trumpet-shaped insertion guide groove communicating with the insertion groove is formed at the entrance end of the insertion groove.

[0012] Preferably, a main lifting shaft is provided at the lifting end of the boom, and a first main lifting pulley and a second main lifting pulley are provided on the main lifting shaft, the first main lifting pulley is provided in the middle of the main lifting shaft, and the second main lifting pulley is divided into two groups, and the two groups of the second main lifting pulleys are respectively provided at both ends of the main lifting shaft; one end of the first steel wire rope is connected to the first hook pulley, and the other end passes around the first main lifting pulley provided at the lifting end of the boom and is connected to a first power unit provided on the ground; one end of the two second steel wire ropes is respectively connected to one group of the second hook pulley, and the other end passes around the two groups of the second main lifting pulleys respectively and is connected to the second power unit.

[0013] Preferably, the outer walls of the second main lifting pulley and the second hook pulley are respectively provided with a plurality of first slide grooves and second slide grooves along the circumferential direction, the first slide grooves and the second slide grooves are both matched with the second steel wire rope, one end of the second steel wire rope is fixed to the second hook pulley, and the other end is wound around the second hook pulley and the second main lifting pulley along the second slide groove and the first slide groove for multiple times and then connected to the second power unit.

[0014] Preferably, the second power unit is a winch.

[0015] Compared with the prior art, the technical solution of the embodiment of the utility model has beneficial effects.

[0016] The utility model provides a combined hook for a tower crane, in which a second hook is arranged to connect with a first hook to form a combined hook, a second hook pulley, a second main lifting pulley and a second power unit arranged on the cabin of the second hook are connected by a second steel wire rope, and the combined hook is driven by the second power unit to perform a lifting operation, replacing the original lifting operation by driving the first hook by the first power unit, so that the lifting process is not affected by waves.

[0017] Furthermore, the bottom ends of the two plug-in plates of the second hook are bent away from each other, forming a trumpet-shaped insertion guide groove at the entrance end of the insertion groove, which is conducive to the connection plate smoothly entering the insertion groove.

[0018] Furthermore, the connecting groove of the connecting plate of the first hook is a vertically arranged waist-shaped groove. When it is arranged corresponding to the connecting hole of the plug-in plate, a certain deviation in height is allowed to facilitate the insertion of the latch mechanism into the connecting plug-in plate and the connecting plate, which is conducive to operation in an environment with strong winds and waves. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a combined hook for a tower crane in an embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the second hook structure in the embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the first hook structure in an embodiment of the utility model;

[0022] Figure 4 It is a structural schematic diagram of a combined hook installation for a tower crane and a tower crane in an embodiment of the utility model.

[0023] Description of reference numerals:

[0024] 1. Nacelle; 2. Tower crane;

[0025] 21. first hook; 211. first hook pulley; 212. connecting plate; 213. connecting groove; 22. boom; 23. base; 24. first steel wire rope;

[0026] 31. Second hook; 311. Second hook pulley; 312. Plug-in plate; 313. Insertion slot; 314. Connecting hole; 315. Latch mechanism; 316. Hook frame; 317. Guide block; 318. Wire rope guide slot; 319. Insertion guide slot; 32. Second main lifting pulley; 33. Second wire rope; 34. Second power unit. DETAILED DESCRIPTION

[0027] In order to make the purpose, features and beneficial effects of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments described below are only used to explain the present invention, rather than to limit the present invention. In addition, the same or similar reference numerals may be used in the figures to refer to the same or similar elements in different embodiments, and the description of the same or similar elements in different embodiments and the description of the prior art elements, features, effects, etc. may be omitted.

[0028] Reference Figures 1 to 4 , an embodiment of the utility model provides a combined hook for a tower crane.

[0029] Specifically, it includes a first hook 21 and a second hook 31. The first hook 21 is provided with a first hook pulley 211, and the first hook pulley 211 can be connected to a first power unit (not shown) located on the ground (the clamping plate of the transport ship) through a first steel wire rope 24; two groups of second hook pulleys 311 are respectively provided on both sides of the second hook 31, and the two groups of second hook pulleys 311 can be connected to a second power unit 34 arranged on the nacelle 1 through two second steel wire ropes 33 respectively;

[0030] In a specific implementation, the tower crane 2 is arranged on the cabin 1 of the wind turbine generator set. The tower crane 2 includes a first hook 21, a boom 22, a base 23, a first steel wire rope 24 and a first power unit. One end of the first steel wire rope 24 is connected to the first hook pulley 211, and the other end is connected to the first power unit after passing through the first main lifting pulley 221 arranged at the lifting end of the boom 22 and the auxiliary pulley arranged on the base 23 in sequence.

[0031] The second power unit 34 can be arranged in the boom 22, the base 23 or the cabin 1 of the tower crane 1 located on the cabin 1. Preferably, the second power unit 34 is arranged on the boom 22. During the lifting operation, the second power unit 34 rotates synchronously with the boom 22 and the second steel wire rope 33. When the second power unit 34 is fixed on the base 23 or the cabin 1, it cannot rotate synchronously with the boom 22 and the second steel wire rope 33. It is necessary to set an adjustment pulley to adjust the direction of the second steel wire rope 33 so that when the boom 22 rotates, the second steel wire rope 33 connected to the second power unit 34 will not be twisted or interfered.

[0032] A connecting plate 212 is provided on the top of the first hook 21, and a connecting groove 213 is provided on the connecting plate 212. A plug-in plate 312 is provided below the second hook 31. The plug-in plate 312 is composed of two pieces, and an insertion groove 313 for allowing the connecting plate 212 to be inserted is formed between the two plug-in plates 312. A connecting hole 314 is provided on the plug-in plate 312, and a latch mechanism 315 can be provided in the connecting hole 314. When the connecting plate 212 is inserted into the insertion groove 313 and the connecting hole 314 is provided correspondingly to the connecting groove 213, the second hook 31 is connected to the first hook 21 through the latch mechanism 315 passing through the connecting hole 314 and the connecting groove 213 to form a combined hook.

[0033] When the first power unit loosens the first steel wire rope 24 or releases the first steel wire rope 24, the second power unit 34 loosens or tightens the second steel wire rope 33 to lower or lift the combined hook; the second power unit 34 drives the combined hook to perform lifting operations, replacing the original first power unit driving the first hook 21 to perform lifting operations. The second power unit 34 is arranged on the cabin 1, so that the lifting process is not affected by waves.

[0034] In some embodiments, the second hook 31 includes a hook frame 316, a guide block 317 is arranged at the center of the hook frame 316, the plug-in plate 312 is arranged below the guide block 317, and two sets of second hook pulleys 311 are respectively arranged on both sides of the hook frame 316; a plurality of wire rope guide grooves 318 are vertically arranged on both side surfaces of the guide block 317, and the wire rope guide grooves 318 allow the first wire rope 24 to pass through.

[0035] In some embodiments, the connecting groove 213 is a vertically arranged waist-shaped groove, the connecting hole 314 is a circular hole, the width of the connecting groove 213 matches the diameter of the connecting hole 314, and when the connecting groove 213 is arranged corresponding to the connecting hole 314, a certain deviation in height is allowed to facilitate the insertion of the latch mechanism 315 into the connecting plug plate 312 and the connecting plate 212, which is conducive to operation in an environment with strong winds and waves.

[0036] In some embodiments, the bottom ends of the two plug-in boards 312 are bent away from each other, forming a trumpet-shaped insertion guide groove 319 connected to the insertion groove 313 at the entrance end of the insertion groove 313, which facilitates the connection plate 212 to smoothly enter the insertion groove 313.

[0037] In some embodiments, a main lifting shaft 22 is provided at the lifting end of the boom 11, and a first main lifting pulley 221 and a second main lifting pulley 32 are provided on the main lifting shaft 22. The first main lifting pulley 221 is provided in the middle of the main lifting shaft 22, and the second main lifting pulley 32 is divided into two groups, and the two groups of second main lifting pulleys 32 are respectively provided at both ends of the main lifting shaft 22; one end of the first steel wire rope 24 is connected to the first hook pulley 211, and the other end passes through the first main lifting pulley 221 provided at the lifting end of the boom 22 and is connected to the first power unit provided on the ground; one end of the two second steel wire ropes 33 is respectively connected to a group of second hook pulleys 311, and the other ends respectively pass through the two groups of second main lifting pulleys 32 and then are connected to the second power unit 34.

[0038] In some embodiments, the outer walls of the second main lifting pulley 32 and the second hook pulley 311 are respectively provided with a plurality of first slide grooves and second slide grooves along the circumferential direction, and the first slide grooves and the second slide grooves are matched with the second steel wire rope 33. One end of the second steel wire rope 33 is fixed to the second hook pulley 311, and the other end is wound around the second hook pulley 311 and the second main lifting pulley 32 along the second slide groove and the first slide groove for multiple times and then connected to the second power unit 34.

[0039] In some embodiments, the first power unit is a winch or a winch, and the second power unit 34 is a winch.

[0040] In order to better understand the technical solution provided by the embodiment of the utility model, the process of installing the combined hook is further described below. Specifically, the following steps are included:

[0041] Provide a second power unit 34, and fix the second power unit 34 to the top surface of the boom 22;

[0042] Provide a second main hoisting pulley 32, and arrange the two second main hoisting pulleys 32 at two ends of the main hoisting shaft 222 at the hoisting end of the boom 22 respectively;

[0043] The first power unit is driven to loosen the first steel wire rope 24 and lower the first hook 21, so that at least a gap is formed between the first main lifting pulley 221 and the first hook 21 to accommodate the second hook 31;

[0044] Provide a second hook 31, set the second hook 31 between the first main lifting pulley 221 and the first hook 21, and embed the first steel wire rope 24 through the surface of the second hook 31 into the steel wire rope guide groove 318 in sequence;

[0045] Provide a second steel wire rope 33, fix one end of the two second steel wire ropes 33 to the second hook pulley 311 respectively, and connect the other end to the second power unit 34 after winding around the corresponding second hook pulley 311 and the second main pulley 32 along the second chute and the first chute for multiple times;

[0046] The second power unit 34 is driven to loosen the second steel wire rope 33 and lower the second hook 31, so that the connecting plate 212 of the first hook 21 is inserted into the inserting groove 313 of the second hook 31, and the connecting hole 314 of the plugging plate 312 of the second hook 31 is arranged correspondingly to the connecting groove 213 of the connecting plate 212;

[0047] Pass the latch mechanism 315 through the connecting hole 314 and the connecting groove 213 to connect the second hook 31 with the first hook 21 to form a combined hook;

[0048] The first power unit is driven to loosen or release the first steel wire rope 24, and the second power unit 34 is driven to loosen or tighten the second steel wire rope 33 to lower or lift the combined hook.

[0049] In summary, the utility model provides a combined hook for a tower crane, in which a second hook 31 is arranged to connect the first hook 21 to form a combined hook, and a second hook pulley 311, a second main pulley 32 and a second power unit 34 arranged on the cabin 1 of the second hook 31 are connected by a second steel wire rope 33. The second power unit 34 drives the combined hook to perform lifting operations, replacing the original first power unit driving the first hook 21 for lifting operations, so that the lifting process is not affected by waves.

[0050] Furthermore, in the combined hook for a tower crane provided by the utility model, the bottom ends of the two plug-in plates 312 of the second hook 31 are bent away from each other, forming a trumpet-shaped insertion guide groove 319 at the entrance end of the insertion groove 313, which is conducive to the smooth entry of the connecting plate 212 into the insertion groove 313.

[0051] Furthermore, in the combined hook for a tower crane provided by the utility model, the connecting groove 213 of the connecting plate 212 of the first hook 21 is a vertically arranged waist-shaped groove, which allows a certain deviation in height when it is arranged corresponding to the connecting hole 314 of the plug plate 312, so as to facilitate the insertion of the latch mechanism 315 into the connecting plug plate 312 and the connecting plate 212, which is conducive to operation in an environment with strong winds and waves.

[0052] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even when only a single embodiment is described with respect to specific features. The feature examples provided in the present disclosure are intended to be illustrative rather than limiting, unless otherwise stated. In specific implementations, the technical features of one or more dependent claims may be combined with the technical features of the independent claim, based on actual needs and where technically feasible, and may be derived from the technical features of the corresponding independent claim in any appropriate manner rather than simply through the specific combination listed in the claims.

Claims

1. A combined hook for a tower crane, characterized in that: The invention comprises a first hook and a second hook, wherein the first hook is provided with a first hook pulley, and the first hook pulley can be connected to a first power unit located on the ground through a first steel wire rope; two groups of second hook pulleys are respectively provided on both sides of the second hook, and the two groups of second hook pulleys can be connected to a second power unit arranged on the cabin through two second steel wire ropes respectively; A connecting plate is provided on the top of the first hook, and a connecting groove is provided on the connecting plate. A plug-in plate is provided below the second hook. The plug-in plates are two pieces, and an insertion groove for allowing the connecting plate to be inserted is formed between the two plug-in plates. A connecting hole is provided on the plug-in plate, and a latch mechanism can be provided in the connecting hole. When the connecting plate is inserted into the insertion groove and the connecting hole is provided correspondingly to the connecting groove, the second hook is connected to the first hook through the latch mechanism passing through the connecting hole and the connecting groove to form a combined hook. When the first power unit loosens the first steel wire rope, the second power unit loosens or tightens the second steel wire rope to lower or lift the combined hook.

2. The combined hook for a tower crane according to claim 1, characterized in that: The second hook includes a hook frame, a guide block is arranged at the center of the hook frame, the plug plate is arranged below the guide block, and two groups of the second hook pulleys are respectively arranged on both sides of the hook frame; a plurality of wire rope guide grooves are vertically arranged on both side surfaces of the guide block, and the wire rope guide grooves allow the first wire rope to pass through.

3. The combined hook for a tower crane according to claim 1, characterized in that: The connecting groove is a vertically arranged waist-shaped groove, the connecting hole is a circular hole, and the width of the connecting groove matches the diameter of the connecting hole.

4. The combined hook for a tower crane according to claim 1, characterized in that: The bottom ends of the two plug boards are bent in a direction away from each other, and a trumpet-shaped insertion guide groove communicating with the insertion groove is formed at the entrance end of the insertion groove.

5. The combined hook for a tower crane according to claim 1, characterized in that: A main lifting shaft is provided at the lifting end of the boom, and a first main lifting pulley and a second main lifting pulley are provided on the main lifting shaft, the first main lifting pulley is provided in the middle of the main lifting shaft, and the second main lifting pulley is divided into two groups, and the two groups of the second main lifting pulleys are respectively provided at both ends of the main lifting shaft; one end of the first steel wire rope is connected to the first hook pulley, and the other end passes around the first main lifting pulley provided at the lifting end of the boom and is connected to a first power unit provided on the ground; one end of the two second steel wire ropes is respectively connected to one group of the second hook pulley, and the other end passes around the two groups of the second main lifting pulleys respectively and is connected to the second power unit.

6. The combined hook for a tower crane according to claim 5, characterized in that: The outer walls of the second main lifting pulley and the second hook pulley are respectively provided with a plurality of first slide grooves and second slide grooves along the circumferential direction, and the first slide grooves and the second slide grooves are both matched with the second steel wire rope, one end of the second steel wire rope is fixed to the second hook pulley, and the other end is wound around the second hook pulley and the second main lifting pulley along the second slide groove and the first slide groove for multiple times and then connected to the second power unit.

7. The combined hook for a tower crane according to claim 1, characterized in that: The second power unit is a winch.

Images