Box transformer substation replacement lifting sling for wind power operation and maintenance

Abstract

The utility model discloses a box transformer substation replacing and lifting sling for wind power operation and maintenance. The box transformer substation replacing and lifting sling comprises a supporting mechanism, a winch, a suspension mechanism and a box transformer substation connecting mechanism. The supporting mechanism is fixedly arranged at the top end of the fan main rack, the suspension mechanism is erected at the front end of the supporting mechanism, the bottom end of the box transformer substation connecting mechanism is connected with a to-be-replaced box transformer substation, and the winch is connected with the suspension mechanism through a traction rope so that traction of the box transformer substation connecting mechanism can be achieved. The box transformer substation is formed by assembling a plurality of components, and the single component is small in size, light in weight, easy to assemble, large in bearing capacity and suitable for box transformer substation replacement of windmills in different environments. The supporting mechanism is integrally assembled in a windmill case, the suspension mechanism adopts a multi-pulley guiding labor-saving structure, is matched with the box transformer substation connecting mechanism for use, and is dragged through a winch, so that the box transformer substation lifting effect can be achieved by adopting minimum force, and compared with a lifting crane, the device saves cost, is not limited by site space, saves time and labor, and is wider in application range; and the windmill maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting devices, in particular to a lifting hanger for replacing a box transformer used in wind power operation and maintenance. Background Art

[0002] Most of my country's wind turbines are installed in fields, reservoirs, grasslands, hillsides, mountains, coastal areas, deep seas and other dangerous environments with high wind speed and strong winds. In addition, long-term exposure to the sun, thunderstorms and other natural damages lead to non-directional damage to the internal parts of the wind turbines, so the operation and maintenance of large wind power components is an inevitable trend. Since large components are all inside the high-altitude cabin, especially the box transformer, they are heavy and large in size, and it is difficult to replace them without a lifting crane. However, the cost-effectiveness of replacement costs and the cost of renting a lifting crane is too different, which makes the cost of replacing parts increase exponentially. In order to solve this situation, it is urgent to design a hoist that can realize the replacement of large parts without using a lifting crane. Utility Model Content

[0003] In order to solve the technical problems mentioned in the background technology, the utility model provides a lifting device for replacing a box transformer for wind power operation and maintenance.

[0004] The utility model adopts the following technical solution: a lifting device for replacing a box transformer for wind power operation and maintenance, comprising a supporting mechanism, a hoist, a suspension mechanism and a box transformer connecting mechanism;

[0005] The support mechanism is fixedly arranged on the top of the fan main frame;

[0006] The suspension mechanism is mounted at the front end of the support mechanism and is used to pull the box-type transformer connection mechanism to rise or fall;

[0007] The bottom end of the box-type transformer connection mechanism is connected to the box-type transformer to be replaced;

[0008] The hoist is connected to the suspension mechanism via a traction rope to achieve traction on the box-type transformer connection mechanism.

[0009] Furthermore, the supporting mechanism includes four bottom columns, a pair of main beams, a supporting beam, a plurality of cross supports and a plurality of oblique supports; a pair of the main beams are erected in parallel on the bottom columns in pairs, and the two are vertically connected and fixed by the plurality of cross supports; the main beam includes a first positioning beam and a second positioning beam arranged at both ends, and a telescopic beam movably arranged therebetween; the bottom ends of the first positioning beam and the second positioning beam are fixedly connected to the bottom columns respectively, and are fixedly positioned by oblique supports; the supporting beam is vertically and horizontally installed at the front end of a pair of the second positioning beams.

[0010] Furthermore, a pull rod support frame is vertically erected on the top of the pair of second positioning beams; the pull rod support frame is connected and locked with the pair of first positioning beams and the pair of second positioning beams respectively through pull rods.

[0011] Furthermore, the suspension mechanism includes a cantilever lifting beam, a supporting lifting beam, a plurality of guide fixed pulleys and a pair of guide movable pulleys; the supporting lifting beam is fixedly arranged at the top end of the supporting beam; the cantilever lifting beam is positioned at the front end of the supporting lifting beam by bolts; the plurality of guide fixed pulleys are evenly distributed on both sides of the cantilever lifting beam and the supporting lifting beam; the pair of guide movable pulleys are installed on the pulley mounting frame at the top of the box-type transformer connecting mechanism; the traction rope extends from the winch, passes around the plurality of guide fixed pulleys and a pair of guide movable pulleys, and is fixed to the traction rope fixing anchor point at the end of the supporting lifting beam to pull the box-type transformer connecting mechanism to lift or lower.

[0012] Furthermore, the box-type transformer connection mechanism also includes a connection plate; the pulley mounting frame is arranged at the top end of the connection plate; and a box-type transformer fixing anchor point is arranged at the bottom end of the connection plate.

[0013] Compared with the prior art, the utility model has the following advantages: the wind power operation and maintenance box transformer replacement lifting sling designed by the utility model is composed of multiple parts, each of which is small in size, light in weight, easy to assemble, and has a large bearing capacity, and is suitable for the replacement of wind turbine box transformers in different environments. The supporting mechanism is assembled in the wind turbine chassis as a whole, and the suspension mechanism adopts a multi-pulley guide labor-saving structure, which is used in conjunction with the box transformer connection mechanism and is pulled by a winch, so that the box transformer lifting effect can be achieved with the minimum force. Compared with a lifting crane, this device saves costs, is not limited by site space, saves time and effort, has a wider range of use, and improves the maintenance efficiency of wind turbines. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the installation of a lifting device for replacing a box-type transformer for wind power operation and maintenance according to the utility model;

[0015] Figure 2 The utility model is a schematic diagram of the overall structure of the lifting device for replacing the box-type transformer for wind power operation and maintenance.

[0016] in:

[0017] 1-support mechanism, 2-winch, 3-suspension mechanism, 4-box transformer connection mechanism, 5-fan main frame, 6-box transformer to be replaced, 7-traction rope,

[0018] 11- bottom column, 12- main beam, 13- support beam, 14- horizontal support, 15- inclined support, 16- tie rod support frame, 17- tie rod, 12-1- first positioning beam, 12-2- second positioning beam, 12-3- telescopic beam,

[0019] 31-cantilever lifting beam, 32-support lifting beam, 33-guide fixed pulley, 34-guide movable pulley,

[0020] 41- pulley mounting frame, 42- connecting plate, 43- box-type transformer fixing anchor point. DETAILED DESCRIPTION

[0021] In order to facilitate those skilled in the art to understand the technical solution of the utility model, further description is now made with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model.

[0022] In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention. However, it is apparent that one or more embodiments may be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0023] See also Figure 1 , is a schematic diagram of the installation of the lifting device for replacing the box transformer for wind power operation and maintenance of the utility model. As shown in the figure, the wind turbine is mainly composed of three parts: the tower, the nacelle and the wind wheel. Box transformers are installed on both sides of the nacelle. The main structure inside the nacelle is the main frame 5. The utility model includes a supporting mechanism 1, a winch 2, a suspension mechanism 3 and a box transformer connecting mechanism 4. The supporting mechanism 1 is fixedly arranged on the top of the wind turbine main frame 5 and is fastened by flange bolts. The suspension mechanism frame 3 is arranged at the front end of the supporting mechanism 1, and is used to pull the box transformer connecting mechanism 4 to lift or lower. The bottom end of the box transformer connecting mechanism 4 is connected to the box transformer 6 to be replaced. The winch 2 can be installed and fixed on the ground on the side of the tower, and is connected to the suspension mechanism 3 through a traction rope 7 to achieve traction of the box transformer connecting mechanism 4.

[0024] like Figure 2As shown, it is a schematic diagram of the overall structure of the lifting sling for replacing the box transformer for wind power operation and maintenance of the utility model, wherein the support mechanism 1 includes four bottom columns 11, a pair of main beams 12, a support beam 13, a plurality of cross supports 14 and a plurality of oblique supports 15. The four bottom columns 11 are arranged on the main frame 5 through flanges and flange bolts for the overall structure to bear force. A pair of main beams 12 are arranged in parallel on the bottom columns 11 in pairs, and the two are vertically connected and fixed by a plurality of cross supports 14. The main beam 12 includes a first positioning beam 12-1 and a second positioning beam 12-2 arranged at both ends, and a telescopic beam 12-3 movably arranged between the two. The telescopic beam 12-3 can adjust the overall extension length of the main beam 12 according to the size of the main frame 5. The bottom ends of the first positioning beam 12-1 and the second positioning beam 12-2 are fixedly connected to the bottom columns 11 respectively, and are fixedly positioned by oblique supports 15 to enhance the overall stability. The support beam 13 is vertically and horizontally installed at the front end of a pair of second positioning beams 12-2.

[0025] In this embodiment, a pull rod support frame 16 is vertically installed on the top of a pair of second positioning beams 12-2, and the pull rod support frame 16 is connected and locked with a pair of first positioning beams 12-1 and a pair of second positioning beams 12-2 respectively through pull rods 17, thereby ensuring smooth and reliable operation during work.

[0026] Please continue to refer to Figure 2 In this embodiment, the suspension mechanism 3 includes a cantilever lifting beam 31, a supporting lifting beam 32, a plurality of guide fixed pulleys 33 and a pair of guide movable pulleys 34. The supporting lifting beam 32 is fixedly arranged at the top of the supporting beam 13, the cantilever lifting beam 31 is positioned at the front end of the supporting lifting beam 32 by bolts, and a plurality of guide fixed pulleys 33 are evenly distributed on both sides of the cantilever lifting beam 31 and the supporting lifting beam 32. In this embodiment, four fixed pulleys are taken as an example, namely, guide fixed pulley A, guide fixed pulley B, guide fixed pulley C and guide fixed pulley D, wherein the guide fixed pulley A is installed on the outer side of the cantilever lifting beam 31, the guide fixed pulley B is installed on the outer side of the supporting lifting beam 32, and the guide fixed pulley C and the guide fixed pulley D are installed on the inner side of the supporting lifting beam 32. A pair of guide movable pulleys 34 are installed on the pulley mounting frame 41 at the top of the box-type transformer connection mechanism 4. As shown in the figure, the pair of guide movable pulleys 34 are guide movable pulley E and guide movable pulley F. The traction rope 7 extends from the winch 2, passes through a plurality of guide fixed pulleys 33 and a pair of guide movable pulleys 34, and is fixed to the traction rope fixing anchor point at the end of the supporting lifting beam 32, so as to be lifted or lowered by the traction box-changing connecting mechanism 4. As shown in the figure, the traction rope 7 passes through the guide fixed pulley A and the guide fixed pulley B in sequence, passes through the guide movable pulley F, then passes from the guide movable pulley F to the guide fixed pulley C, then passes through the guide fixed pulley D, and then passes through the guide movable pulley E downward, and finally is fixed to the traction rope fixing anchor point.

[0027] In this embodiment, the box transformer connection mechanism 4 also includes a connection plate 42, a pulley mounting frame 41 is arranged at the top of the connection plate 42, and a box transformer fixed anchor point 43 is arranged at the bottom of the connection plate 42. The box transformer fixed anchor point 43 is connected to the box transformer, and the box transformer connection mechanism 4 is driven by the traction rope 7 to carry the box transformer to achieve the effect of lifting and lowering. During the replacement of the box transformer, the old box transformer is directly hoisted and lowered to the transport vehicle, and the new box transformer does not need to be unloaded, and the box transformer connection mechanism 4 can be directly connected to the new box transformer.

[0028] In summary, the utility model is designed to replace the lifting sling for wind power operation and maintenance of box transformers, which is composed of multiple components. Each component is small in size, light in weight, easy to assemble, and has a large bearing capacity. It is suitable for the replacement of wind turbine box transformers in different environments. The supporting mechanism is assembled in the wind turbine chassis as a whole. The suspension mechanism adopts a multi-pulley guide labor-saving structure, which is used in conjunction with the box transformer connection mechanism and is pulled by a winch. Therefore, the box transformer lifting effect can be achieved with the minimum force. Compared with a lifting crane, this device saves costs, is not limited by site space, saves time and effort, has a wider range of use, and improves the maintenance efficiency of wind turbines.

[0029] The above embodiments are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A lifting device for replacing a box-type transformer for wind power operation and maintenance, characterized in that: It comprises a supporting mechanism (1), a hoist (2), a suspension mechanism (3) and a box-type transformer connecting mechanism (4); The support mechanism (1) is fixedly arranged on the top of the fan main frame (5); The suspension mechanism (3) is arranged at the front end of the support mechanism (1) and is used to pull the box-type transformer connection mechanism (4) to rise or fall; The bottom end of the box-type transformer connection mechanism (4) is connected to the box-type transformer (6) to be replaced; The hoist (2) is connected to the suspension mechanism (3) via a traction rope (7) to achieve traction of the box-type transformer connection mechanism (4).

2. The lifting device for replacing a box-type transformer for wind power operation and maintenance according to claim 1 is characterized in that: The support mechanism (1) comprises four bottom columns (11), a pair of main cross beams (12), a supporting beam (13), a plurality of cross supports (14) and a plurality of oblique supports (15); the pair of main cross beams (12) are erected in parallel on the bottom columns (11) in pairs, and the two are vertically connected and fixed by the plurality of cross supports (14); the main cross beam (12) comprises a first positioning cross beam (12-1) and a second positioning cross beam (12-2) arranged at two ends, and a telescopic cross beam (12-3) movably arranged between the two; the bottom ends of the first positioning cross beam (12-1) and the second positioning cross beam (12-2) are respectively fixedly connected to the bottom columns (11) and fixedly positioned by the oblique supports (15); the supporting beam (13) is vertically and horizontally installed at the front ends of the pair of the second positioning cross beams (12-2).

3. The lifting device for replacing a box-type transformer for wind power operation and maintenance according to claim 2 is characterized in that: A pull rod support frame (16) is vertically erected on the top of the pair of second positioning beams (12-2); the pull rod support frame (16) is connected and locked with the pair of first positioning beams (12-1) and the pair of second positioning beams (12-2) respectively via pull rods (17).

4. The lifting device for replacing a box-type transformer for wind power operation and maintenance according to claim 3 is characterized in that: The suspension mechanism (3) comprises a cantilever lifting beam (31), a supporting lifting beam (32), a plurality of guide fixed pulleys (33) and a pair of guide movable pulleys (34); the supporting lifting beam (32) is fixedly arranged at the top end of the supporting beam (13); the cantilever lifting beam (31) is positioned at the front end of the supporting lifting beam (32) by means of bolts; the plurality of guide fixed pulleys (33) are evenly distributed on both sides of the cantilever lifting beam (31) and the supporting lifting beam (32); the pair of guide movable pulleys (34) are mounted on a pulley mounting frame (41) at the top of the box-type transformer connecting mechanism (4); the traction rope (7) extends from the winch (2), passes around the plurality of guide fixed pulleys (33) and the pair of guide movable pulleys (34), and is then fixed to a traction rope fixing anchor point at the end of the supporting lifting beam (32) to traction the box-type transformer connecting mechanism (4) to be lifted or lowered.

5. The lifting device for replacing a box-type transformer for wind power operation and maintenance according to claim 4 is characterized in that: The box-type transformer connection mechanism (4) further comprises a connection plate (42); the pulley mounting frame (41) is arranged at the top end of the connection plate (42); and a box-type transformer fixing anchor point (43) is arranged at the bottom end of the connection plate (42).

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