Auxiliary hoisting pulley block for tower crane

Abstract

The utility model provides an auxiliary hoisting pulley block for a tower crane, which comprises two groups of auxiliary hoisting pulleys symmetrically arranged on two sides of the crane, and two steel wire ropes respectively penetrate through one group of auxiliary hoisting pulleys; the auxiliary hoisting pulley at least comprises a first pulley arranged on the side surface of the hoisting end of the hoisting arm and a second pulley arranged on the side surface of the base; one end of the steel wire rope is connected with the lifting end of the lifting arm, and the other end of the steel wire rope sequentially penetrates through the first pulley, the second pulley and a main lifting pulley for lifting a lifting frame of the crane and then is connected to a power unit located on the ground; when the crane is hoisted, the hanging bracket is arranged on the cabin, the crane is vertically arranged, the second pulley is located above the first pulley, and the steel wire rope bypasses the first pulley from the side away from the cabin and then bypasses the second pulley from the side close to the cabin. The power unit tightens the steel wire rope to achieve crane hoisting. By reasonably deploying the pulleys and setting the trend of the steel wire rope, the stable hoisting of the tower crane is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power generation, and in particular relates to an auxiliary hoisting pulley block for a tower crane. Background Art

[0002] The blades of wind turbines need to be replaced, but the blades are very heavy and the tower is very high. At present, large truck cranes are generally used to replace the blades of wind turbines, while crawler cranes are needed to replace the blades of large-megawatt high-tower wind turbines, and outrigger boats are needed to replace the blades of offshore wind turbines. The use of large lifting equipment will not only incur high lifting costs, but also be subject to environmental conditions.

[0003] Now a tower crane for a wind turbine is proposed. The tower crane is arranged on the nacelle. The tower crane can be used to replace blades without using large lifting equipment. The tower crane itself also needs to be hoisted onto the nacelle to be installed and fixed before it can be used.

[0004] Therefore, it is necessary to provide an auxiliary hoisting pulley block for the tower crane, so as to realize the overall stable hoisting of the tower crane by using the steel wire rope of the tower crane itself. Utility Model Content

[0005] The utility model provides an auxiliary hoisting pulley block for a tower crane, which realizes stable hoisting of the tower crane by reasonably deploying pulleys and setting the direction of steel wire ropes.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions.

[0007] An auxiliary hoisting pulley block for a tower crane, the crane comprising a boom, a base, a steel wire rope and a power unit, the boom being arranged on the base, characterized in that the auxiliary hoisting pulley block comprises two groups of auxiliary hoisting pulleys symmetrically arranged on both sides of the crane, the steel wire ropes being two, and the two steel wire ropes respectively passing through one group of the auxiliary hoisting pulleys;

[0008] The auxiliary hoisting pulley at least comprises a first pulley arranged on the side of the hoisting end of the boom and a second pulley arranged on the side of the base;

[0009] One end of the wire rope is connected to the lifting end of the boom, and the other end is connected to the power unit located on the ground after passing through the first pulley, the second pulley and a main lifting pulley of the hanger for lifting the crane in sequence;

[0010] When hoisting the crane, the hanger is set on the cabin, the crane is set vertically, the second pulley is located above the first pulley, the wire rope passes around the first pulley from the side away from the cabin and then passes around the second pulley from the side close to the cabin; the crane is hoisted by tightening the wire rope through the power unit.

[0011] Preferably, the second pulley is arranged at the end of the main rotating shaft of the base connected to the boom.

[0012] Preferably, the first pulley is arranged in a pulley frame through a pulley shaft, the first pulley can rotate freely along the pulley shaft in the pulley frame, the first pulley is fixed to the side of the lifting end of the boom through the pulley frame, and when the wire rope passes around the first pulley, the wire rope passes through the pulley frame.

[0013] Preferably, two groups of adjusting pulley groups are symmetrically arranged in the base, and the auxiliary lifting pulley also includes a third pulley arranged on the side of the boom close to the lifting end; when lifting the crane, the wire rope passes through the main lifting pulley and then bypasses a group of the adjusting pulley groups and the third pulley to be connected to the power unit.

[0014] Preferably, the third pulley is fixed to the side close to the lifting end of the boom through a mounting frame, and the wire rope passes around the third pulley from the side away from the cabin. When the wire rope passes around the third pulley, the wire rope passes through the mounting frame.

[0015] Preferably, a crane pulley is provided at the lifting end of the boom, the crane pulley is connected to a hook via a steel wire rope, the hook is provided with a hook pulley, one end of the steel wire rope is connected to the hook pulley and then passes through the crane pulley, the first pulley, the second pulley, the main lifting pulley, the adjustment pulley group and the third pulley in sequence to be connected to a power unit located on the ground.

[0016] Preferably, the two steel wire ropes are connected to form one steel wire rope at the end connected to the hook pulley. After one end of the steel wire rope is connected to the power unit, it passes through the third pulley of a group of auxiliary lifting pulleys, a group of adjusting pulley blocks, a main lifting pulley, the second pulley, the first pulley, the crane pulley, the hook pulley and then bypasses the crane pulley. It then passes through the first pulley of another group of auxiliary lifting pulleys, the second pulley, another main lifting pulley, another group of adjusting pulley blocks and the third pulley in sequence to be connected to the power unit located on the ground.

[0017] Compared with the prior art, the technical solution of the embodiment of the utility model has beneficial effects.

[0018] The utility model provides an auxiliary hoisting pulley block for a tower crane, wherein two sets of auxiliary hoisting pulleys are symmetrically arranged on both sides of the crane, and two steel wire ropes are respectively passed through the auxiliary hoisting pulleys and a main hoisting pulley of a hanger for hoisting the crane, and then connected to a power unit located on the ground. The two steel wire ropes cooperate with the two sets of auxiliary hoisting pulleys to resist the imbalance caused by micro-motion interference, thereby improving the anti-flipping performance of the crane during hoisting, and facilitating the stable hoisting of the crane.

[0019] Furthermore, the first pulley is mounted on the boom through a pulley frame. When the wire rope passes around the first pulley, the wire rope passes through the pulley frame. The pulley frame prevents the wire rope from detaching from the first pulley, which is beneficial to the stable lifting of the crane.

[0020] Furthermore, a third pulley is arranged on the boom, and when the crane is hoisted, the wire rope is connected to the power unit after passing through the adjustment pulley block, so that the crane is more stable on the wire rope, which is conducive to the smooth hoisting of the crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of an auxiliary hoisting pulley block for a tower crane in an embodiment of the utility model when hoisting the crane;

[0022] Figure 2 It is a structural schematic diagram of an auxiliary hoisting pulley block for a tower crane in an embodiment of the utility model when hoisting the crane;

[0023] Figure 3 It is a side view of an auxiliary hoisting pulley block for a tower crane in an embodiment of the utility model when the crane is being hoisted;

[0024] Figure 4 It is an enlarged view of the auxiliary lifting pulley block used for the tower crane in the embodiment of the utility model when the crane is being lifted;

[0025] Figure 5 It is an enlarged view of the auxiliary lifting pulley block used for the tower crane in the embodiment of the utility model when the crane is lifted from another angle.

[0026] Description of reference numerals:

[0027] 1. Tower; 2. Nacelle; 3. Crane; 4. Hanger; 5. Hoisting equipment; 6. Auxiliary hoisting pulley;

[0028] 31. Base; 33. Boom; 34. Hook; 341. Hook pulley; 35. Wire rope; 36. Adjust pulley block; 37. Power unit;

[0029] 41. Main hoist pulley;

[0030] 61. First pulley; 62. Second pulley; 63. Third pulley; 64. Pulley frame; 65. Mounting frame. DETAILED DESCRIPTION

[0031] 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.

[0032] Reference Figures 1 to 5 The embodiment of the utility model provides an auxiliary lifting pulley block for a tower crane, which realizes the smooth lifting of the tower crane 3 by reasonably deploying the pulleys and setting the direction of the wire rope 35.

[0033] Specifically, the crane 3 includes a base 31, a boom 33, a wire rope 35 and a power unit 37. The boom 33 is disposed on the base 31 and can adjust the pitch angle relative to the base 31.

[0034] The auxiliary lifting pulley block includes two sets of auxiliary lifting pulleys 6 symmetrically arranged on both sides of the crane 3, and two steel wire ropes 35, which pass through one set of auxiliary lifting pulleys 6 respectively;

[0035] The auxiliary hoisting pulley 6 at least includes a first pulley 61 arranged on the side of the hoisting end of the boom 33 and a second pulley 62 arranged on the side of the base 31;

[0036] One end of the wire rope 35 is connected to the lifting end of the boom 33, and the other end passes through the first pulley 61, the second pulley 62 and a main lifting pulley 41 of the hanger 4 for lifting the crane 3 in sequence, and then is connected to the power unit 37 located on the ground;

[0037] When hoisting the crane 3, the hanger 4 is detachably set on the hoisting equipment 5, and the hoisting equipment 5 is set on the cabin 2, and the cabin 2 is located at the top of the tower 1; the crane 3 is vertically set, the second pulley 62 is located above the first pulley 61, and the wire rope 35 passes around the first pulley 61 from the side away from the cabin 2 and then passes around the second pulley 62 from the side close to the cabin 2; the wire rope 35 is tightened by the power unit 37 to realize the hoisting of the crane 3.

[0038] In some embodiments, the power unit 37 is a winch or a hoist.

[0039] In some embodiments, the second pulley 62 is disposed at the end of the main shaft of the base 31 connected to the boom 33, and there is no need to separately provide a shaft for mounting the second pulley 62 and allowing the second pulley 62 to rotate.

[0040] In some embodiments, the first pulley 61 is set in the pulley frame 64 through the pulley shaft. The first pulley 61 can rotate freely along the pulley shaft in the pulley frame 64. The first pulley 61 is fixed to the side of the lifting end of the boom 33 through the pulley frame 64. When the wire rope 35 passes around the first pulley 61, the wire rope 35 passes through the pulley frame 64. The pulley frame 64 prevents the wire rope 35 from detaching from the first pulley 61, which is beneficial to the smooth lifting of the crane 3.

[0041] In some embodiments, two sets of adjusting pulley groups 36 are symmetrically arranged in the base 31, and the adjusting pulley groups 36 are used to adjust the direction of the wire rope 35 in the base 31 to prevent the wire rope 35 from being entangled when the crane 3 is working; the auxiliary lifting pulley 6 also includes a third pulley 63 arranged on the side of the boom 33 close to the lifting end; when lifting the crane 3, the wire rope 35 passes through the main lifting pulley 41 and then bypasses a set of adjusting pulley groups 36 and the third pulley 63 to connect to the power unit 37.

[0042] In some embodiments, the third pulley 63 is fixed to the side near the lifting end of the boom 33 through a mounting frame 65, and the wire rope 35 passes around the third pulley 63 from the side away from the cabin 2. When the wire rope 35 passes around the third pulley 63, the wire rope 35 passes through the mounting frame 65. The mounting frame 65 prevents the wire rope 35 from detaching from the third pulley 63, which is beneficial to the smooth lifting of the crane 3.

[0043] In some embodiments, a crane pulley 331 is provided at the lifting end of the boom 33, and the crane pulley 331 is connected to the hook 34 through a wire rope 35. The hook 34 is provided with a hook pulley 341. One end of the wire rope 35 is connected to the hook pulley 341 and then passes through the crane pulley 331, the first pulley 61, the second pulley 62, the main lifting pulley 41, the adjustment pulley group 36 and the third pulley 63 in sequence to be connected to the power unit 37 located on the ground.

[0044] In some embodiments, the two steel wire ropes 35 are connected as one at the end connected to the hook pulley 341 to form a steel wire rope. After one end of the steel wire rope is connected to the power unit 37, it passes through the third pulley 63 of a group of auxiliary lifting pulleys 6, a group of adjusting pulley groups 36, a main lifting pulley 41, the second pulley 62, the first pulley 61, the crane pulley 331, the hook pulley 341 and then bypasses the crane pulley 331, and then passes through the first pulley 61, the second pulley 62, another main lifting pulley 41, another group of adjusting pulley groups 36 and the third pulley 63 of another group of auxiliary lifting pulleys 6 in sequence to be connected to the power unit 37 located on the ground.

[0045] To sum up, the auxiliary lifting pulley group for the tower crane provided by the utility model has two sets of auxiliary lifting pulleys 6 symmetrically arranged on both sides of the crane 3, and is connected to a power unit 37 located on the ground after two steel wire ropes 35 pass through the auxiliary lifting pulley 6 and a main lifting pulley 41 of the hanger 4 for lifting the crane 3 respectively. The two steel wire ropes 35 cooperate with the two sets of auxiliary lifting pulleys 6 to resist the imbalance caused by micro-motion interference, thereby improving the anti-overturning performance of the crane 3 during lifting, and facilitating the smooth lifting of the crane 3.

[0046] Furthermore, the auxiliary hoisting pulley block for the tower crane provided by the utility model has a first pulley 61 installed on the boom 33 through a pulley frame 64. When the wire rope 35 passes around the first pulley 61, the wire rope 35 passes through the pulley frame 64. The pulley frame 64 prevents the wire rope 35 from detaching from the first pulley 61, which is conducive to the stable hoisting of the crane 3.

[0047] Furthermore, the auxiliary lifting pulley group for the tower crane provided by the utility model has a third pulley 63 set on the boom 33. When the crane is hoisted, the wire rope 35 is connected to the power unit 37 after passing through the adjustment pulley group 36, so that the crane 3 is more stable on the wire rope 35, which is conducive to the smooth lifting of the crane 3.

[0048] 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. An auxiliary hoisting pulley block for a tower crane, the crane comprising a boom, a base, a wire rope and a power unit, the boom being arranged on the base, characterized in that: The auxiliary lifting pulley block comprises two groups of auxiliary lifting pulleys symmetrically arranged on both sides of the crane, and the steel wire ropes are two, and the two steel wire ropes pass through one group of auxiliary lifting pulleys respectively; The auxiliary hoisting pulley at least comprises a first pulley arranged on the side of the hoisting end of the boom and a second pulley arranged on the side of the base; One end of the wire rope is connected to the lifting end of the boom, and the other end is connected to the power unit located on the ground after passing through the first pulley, the second pulley and a main lifting pulley of the hanger for lifting the crane in sequence; When hoisting the crane, the hanger is set on the cabin, the crane is set vertically, the second pulley is located above the first pulley, the wire rope passes around the first pulley from the side away from the cabin and then passes around the second pulley from the side close to the cabin; the crane is hoisted by tightening the wire rope through the power unit.

2. The auxiliary hoisting pulley block for a tower crane according to claim 1, characterized in that: The second pulley is arranged at the end of the main rotating shaft of the base connected to the boom.

3. The auxiliary hoisting pulley block for a tower crane according to claim 1, characterized in that: The first pulley is arranged in the pulley frame through the pulley shaft, the first pulley can rotate freely along the pulley shaft in the pulley frame, the first pulley is fixed to the side of the lifting end of the boom through the pulley frame, and when the wire rope passes around the first pulley, the wire rope passes through the pulley frame.

4. The auxiliary hoisting pulley block for a tower crane according to claim 1, characterized in that: Two groups of adjusting pulleys are symmetrically arranged in the base, and the auxiliary lifting pulley also includes a third pulley arranged on the side of the boom close to the lifting end; when lifting the crane, the wire rope passes through the main lifting pulley and then bypasses a group of the adjusting pulleys and the third pulley to be connected to the power unit.

5. The auxiliary hoisting pulley block for a tower crane according to claim 4, characterized in that: The third pulley is fixed to the side surface close to the lifting end of the boom through a mounting frame, and the steel wire rope passes around the third pulley from the side away from the cabin. When the steel wire rope passes around the third pulley, the steel wire rope passes through the mounting frame.

6. The auxiliary hoisting pulley block for a tower crane according to claim 4, characterized in that: A crane pulley is provided at the lifting end of the boom, and the crane pulley is connected to a hook via a steel wire rope, and the hook is provided with a hook pulley. One end of the steel wire rope is connected to the hook pulley and then passes through the crane pulley, the first pulley, the second pulley, the main lifting pulley, the adjustment pulley group and the third pulley in sequence to be connected to a power unit located on the ground.

7. The auxiliary hoisting pulley block for a tower crane according to claim 6, characterized in that: The two steel wire ropes are connected as one at the end connected to the hook pulley, and one end of the steel wire rope is connected to the power unit and sequentially passes through the third pulley of a group of auxiliary lifting pulleys, a group of adjusting pulley blocks, a main lifting pulley, the second pulley, the first pulley, the crane pulley, the hook pulley and then bypasses the crane pulley, and then sequentially passes through the first pulley of another group of auxiliary lifting pulleys, the second pulley, another main lifting pulley, another group of adjusting pulley blocks and the third pulley to be connected to the power unit located on the ground.

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