Box transformer replacement lifting spreader for wind power operation and maintenance

Abstract

The application relates to a box replacement lifting spreader for wind power operation and maintenance, which comprises a chassis assembly, the chassis assembly comprises a receiving plate, a locking frame, a locking bolt and a vertical steel frame, four locking grooves are uniformly arranged on the receiving plate, one locking frame is inserted into the inner side of each locking groove, the locking frame is L-shaped, the top of the locking frame is inserted with the locking bolt, and the bottom end of the locking bolt is in threaded connection with the receiving plate. The structure is more simple, the L-shaped locking frame of the chassis assembly is matched with the locking bolt, the stable locking of the spreader and the cabin can be quickly realized, and the operation convenience is obviously superior to the prior art.

Description

Technical Field

[0001] This invention belongs to the field of lifting tools, specifically a lifting tool for replacing transformer substations used in wind power operation and maintenance. Background Technology

[0002] In the field of wind power operation and maintenance, prefabricated substations, as core equipment, require regular replacement and maintenance. However, due to their installation in high-altitude nacelles and their large weight and size, traditional replacement methods relying on cranes suffer from high costs and limitations imposed by terrain and space constraints. Existing patents disclose a lifting device for replacing prefabricated substations in wind power operation and maintenance, which effectively solves the above pain points. Its core advantage lies in its modular assembly design, with individual components being small in size and lightweight, facilitating high-altitude transportation and assembly, eliminating the need for large lifting equipment, and significantly reducing operating costs and site limitations. At the same time, a stable load-bearing frame is built through a support mechanism, combined with a multi-pulley guide labor-saving structure and a winch traction system, enabling efficient lifting and lowering of the prefabricated substation, greatly improving the convenience and efficiency of wind power operation and maintenance, and making it suitable for wind turbine prefabricated substation replacement scenarios in various complex environments.

[0003] However, existing lifting devices still have room for improvement: First, the fixing methods between the support mechanism and the nacelle are relatively simple, mainly relying on top flange connections or frame supports. Under complex working conditions such as strong winds and vibrations at high altitudes, the lifting device is prone to slight displacement due to insufficient friction on the contact surface or uneven force, affecting operational stability. Second, the guidance and avoidance design during the lifting process of the transformer substation is not perfect, lacking a dedicated suspension and avoidance structure. When the transformer substation is lifted or moved, it is prone to collision and interference with the nacelle body, support mechanism, etc., posing a risk of equipment damage. Third, the operational flexibility needs to be improved. The traction path of the lifting device and the suspension position of the transformer substation are limited, making it difficult to adapt to the replacement needs of transformer substations with different nacelle layouts and different installation positions. Therefore, a lifting device for replacing transformer substations for wind power operation and maintenance is proposed. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] Given the following technical problems in the existing technology: First, the fixing method between the support mechanism and the nacelle is relatively simple, mainly relying on top flange connection or frame support. Under complex working conditions such as strong winds and vibrations at high altitudes, the lifting equipment is prone to slight displacement due to insufficient friction on the contact surface or uneven force, affecting the stability of the operation. Second, the guidance and avoidance design during the lifting process of the transformer substation is not perfect, lacking a special suspension avoidance structure. When the transformer substation is lifted or moved, it is prone to collision and interference with the nacelle body, support mechanism, etc., posing a risk of equipment damage. Third, the flexibility of operation needs to be improved. The traction path of the lifting equipment and the adjustment of the suspension position of the transformer substation are limited, making it difficult to adapt to the replacement needs of transformer substations with different nacelle layouts and different installation positions.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a wind power operation and maintenance transformer replacement lifting hoist, comprising a base frame assembly, the base frame assembly comprising a receiving plate, a locking frame, locking bolts, and a vertical steel frame, wherein four locking slots are evenly provided on the receiving plate, and a locking frame is inserted into the inner side of each locking slot, the locking frame being L-shaped. The locking frame has a locking bolt inserted at the top, and the bottom end of the locking bolt is threaded to the receiving plate. The receiving plate is placed on the upper side of the engine compartment. The bottom end of the locking frame is lower than the lower side of the engine compartment and is connected to a locking rod. Four vertical steel frames are evenly arranged on the upper side of the receiving plate. A top frame mechanism is set at the top of the vertical steel frames. A winch assembly is rotatably connected to the top of the top frame mechanism. The winch assembly includes a rotating seat, guide rollers, suspension clearance parts, and a winding part. The upper side of the rotating seat is rotatably connected to the guide rollers through a bracket. A suspension clearance part is set on one side of the upper side of the rotating seat. A winding part is set on the receiving plate. The winding part winds up the traction rope. The end of the traction rope away from the winding part passes through the suspension clearance part and is connected to the replacement box.

[0007] As a preferred technical solution for replacing and lifting lifting devices for wind power operation and maintenance transformer substations, the underside of the receiving plate is equipped with friction components, including an elastic pad, a connecting plate, and friction blocks. The elastic pad, made of fluororubber, enhances the buffering performance of the contact surface between the receiving plate and the nacelle, preventing damage to the nacelle from hard contact. The elastic pad wraps around the connecting plate, providing protection and reducing environmental erosion. Several friction blocks are evenly distributed on the underside of the connecting plate, increasing the friction between the receiving plate and the top of the nacelle. The friction blocks pass through the bottom of the elastic pad, making the frictional contact more direct and effective. The frictional connection between the friction blocks and the top of the nacelle prevents lateral displacement of the lifting device during operation, improving installation stability.

[0008] As a preferred technical solution for replacing and lifting equipment for wind power operation and maintenance transformer boxes, two vertical steel frames on the front of the receiving plate and two vertical steel frames on the back of the receiving plate are fixedly equipped with two connecting horizontal arms, which can enhance the connection rigidity between the vertical steel frames and improve the overall load-bearing capacity of the base frame assembly.

[0009] As a preferred technical solution for the replacement and lifting hoisting device of a transformer substation used in wind power operation and maintenance, the suspension and avoidance component includes two cantilever frames. The cantilever frames are S-shaped, which can guide the traction rope and realize the suspension and avoidance of the transformer substation to be replaced. The top of the cantilever frame is fixedly connected to the upper side of the rotating seat, which is stable and can provide reliable support for the guide structure. A guide roller is connected between the two cantilever frames, which can guide the traction rope. The cantilever frame and the guide roller are rotatably connected, which can reduce the friction loss when the traction rope moves. The traction rope passes through the outside of the guide roller on the cantilever frame, which can ensure smooth movement of the traction rope and ensure the stable lifting and lowering of the transformer substation to be replaced.

[0010] As a preferred technical solution for replacing and lifting lifting devices for wind power operation and maintenance transformer substations, the winding component includes an arc-shaped track, a railcar, a winding wheel, a reducer, and a motor. The arc-shaped track is mounted on the receiving plate to guide the movement of the railcar. The arc-shaped track is slidably connected to the railcar, allowing for flexible adjustment of the winding wheel's position and expanding the work coverage area. The winding wheel is rotatably connected to the railcar, facilitating smooth rotation of the winding wheel for the winding and unwinding of the traction rope. The winding wheel winds up the traction rope, enabling orderly storage and release of the traction rope. The winding wheel is fixedly connected to the output end of the reducer, allowing for adjustment of the winding speed and ensuring stable operation. The input end of the reducer is fixedly connected to the power output end of the motor, ensuring stable transmission of motor power to the winding wheel and sufficient traction power.

[0011] As a preferred technical solution for replacing and lifting hoists for wind power operation and maintenance transformer substations, the top frame mechanism also includes cross arms, reinforcing ribs, right-angle connecting plates, and fixing bolts. Two cross arms are respectively set on both sides of the truncated cone, which can enhance the support range and stability of the top frame mechanism. The bottom end of the cross arms is equipped with a right-angle connecting plate, which facilitates the precise docking of the cross arms and the vertical steel frame. The right-angle connecting plate is close to the outer side of the top of the vertical steel frame, which can increase the contact area and improve the connection stability. The fixing bolts connect the right-angle connecting plate and the vertical steel frame. The outer side of the truncated cone and the outer side of the cross arms are also connected to reinforcing ribs, which can realize the firm fixation of the top frame mechanism and the base frame components, ensuring the stability of the overall structure.

[0012] As a preferred technical solution for replacing and lifting hoists for wind power operation and maintenance transformer substations, the base frame assembly also includes a structural frame one, a connecting bolt one, a suspension steel cable, a structural frame two, and a connecting bolt two. The structural frame two is set on the top of the vertical steel frame, and the structural frame one is set on the upper side of the support plate, providing a connection fulcrum for the suspension steel cable. The connecting bolt one is set on the structural frame one, which facilitates the detachable connection between the suspension steel cable and the structural frame one. The connecting bolt one is set on the connecting plate one, and the connecting plate two is threadedly connected to the structural frame two, which can improve the connection reliability between the suspension steel cable and the structural frame. The suspension steel cable is set between the connecting plate one and the connecting plate two, which can enhance the overall deformation resistance of the base frame assembly and improve the load-bearing stability of the hoist.

[0013] The advantages of this invention for a wind power operation and maintenance transformer replacement lifting device are as follows: The structure is simpler; the L-shaped locking frame of the base frame assembly, in conjunction with locking bolts, allows for quick and secure locking of the lifting device to the nacelle, significantly improving operational convenience compared to existing technologies. Furthermore, by adjusting the position of the railcar on the curved track and the angle of the top frame mechanism, the operational coverage area of ​​the transformer to be replaced can be flexibly expanded. Combined with S-shaped cantilever frames and other suspension avoidance components, the transformer to be replaced extends beyond the nacelle, effectively keeping it away from the receiving plate and the nacelle body, greatly reducing the risk of collision and enhancing practicality and safety. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the structure of the present invention; Figure 3 This is a schematic diagram showing the positional relationship between the cantilever frame and the guide roller of the present invention.

[0015] Reference numerals: Base frame assembly 100, receiving plate 101, locking frame 102, locking bolt 103, elastic pad 104, connecting plate 105, friction block 106, structural frame one 107, connecting bolt one 108, suspension steel cable 109, structural frame two 110, connecting bolt two 111, vertical steel frame 112, connecting cross arm 113, top frame mechanism 200, truncated cone 201, cross arm 202, reinforcing rib 203, right angle connecting plate 204, fixing bolt 205, winch assembly 300, rotating seat 301, guide roller 302, cantilever frame 303, traction rope 304, replacement box 305, arc track 306, track car 307, winding wheel 308, reducer 309, motor 310. Detailed Implementation

[0016] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0018] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0019] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0020] like Figures 1-3 As shown, this invention proposes a lifting hoist for replacing transformer substations used in wind power operation and maintenance, including a base frame assembly 100. The base frame assembly 100 includes a receiving plate 101, a locking frame 102, locking bolts 103, and a vertical steel frame 112. Four locking slots are evenly distributed on the receiving plate 101, and a locking frame 102 is inserted into the inner side of each locking slot. The locking frame 102 is L-shaped. The locking frame 102 has a locking bolt 103 inserted into its top. The bottom end of the locking bolt 103 is threaded to the receiving plate 101. The receiving plate 101 is placed on the upper side of the engine compartment. The bottom end of the locking frame 102 is lower than the lower side of the engine compartment and is connected to a locking rod. Four vertical steel frames 112 are evenly arranged on the upper side of the receiving plate 101. A top frame mechanism 200 is provided at the top of the vertical steel frames 112. A winch assembly 300 is rotatably connected to the top of the top frame mechanism 200. The winch assembly 300 includes a rotating seat 301, a guide roller 302, a suspension clearance component, and a winding component. The guide roller 302 is rotatably connected to the upper side of the rotating seat 301 through a bracket. A suspension clearance component is provided on one side of the upper side of the rotating seat 301. A winding component is provided on the receiving plate 101. The winding component winds up the traction rope 304. The end of the traction rope 304 away from the winding component passes through the suspension clearance component and is connected to the replacement box 305.

[0021] Friction components are provided on the underside of the receiving plate 101. These components include an elastic pad 104, a connecting plate 105, and friction blocks 106. The elastic pad 104, made of fluororubber, enhances the buffering performance of the contact surface between the receiving plate and the nacelle, preventing damage to the nacelle from hard contact. The elastic pad 104 wraps around the connecting plate 105, providing protection and reducing environmental erosion. Several friction blocks 106 are evenly distributed on the underside of the connecting plate 105, increasing the friction between the receiving plate and the top of the nacelle. The friction blocks 106 pass through the bottom of the elastic pad 104, making the frictional contact more direct and effective. The friction blocks 106 are frictionally connected to the top of the nacelle, preventing lateral displacement of the lifting equipment during operation and improving installation stability.

[0022] The two vertical steel frames 112 located on the front of the support plate 101 and the two vertical steel frames 112 located on the back of the support plate 101 are each fixedly equipped with two connecting cross arms 113, which can enhance the connection rigidity between the vertical steel frames and improve the overall load-bearing capacity of the base frame assembly.

[0023] The suspension and avoidance mechanism includes two cantilever frames 303, which are S-shaped and can guide the traction rope and achieve suspension and avoidance of the box to be replaced. The top of the cantilever frame 303 is fixedly connected to the upper side of the rotating seat 301, and the connection is stable and can provide reliable support for the guide structure. A guide roller 302 is connected between the two cantilever frames 303, which can guide the traction rope. The cantilever frame 303 and the guide roller 302 are rotatably connected, which can reduce the friction loss when the traction rope moves. The traction rope 304 passes through the outside of the guide roller 302 on the cantilever frame 303, which can ensure smooth movement of the traction rope and ensure the stable lifting and lowering of the box to be replaced.

[0024] The winding assembly includes an arc-shaped track 306, a railcar 307, a winding reel 308, a reducer 309, and a motor 310. The arc-shaped track 306 is mounted on the receiving plate 101 to guide the movement of the railcar. The arc-shaped track 306 is slidably connected to the railcar 307, allowing for flexible adjustment of the winding reel's position and expanding the operating coverage area. The winding reel 308 is rotatably connected to the railcar 307, facilitating smooth rotation of the winding reel to reel in and out of the traction rope. The winding reel 308 winds up the traction rope 304, enabling orderly storage and release of the traction rope. The winding reel 308 is fixedly connected to the output end of the reducer 309, allowing for adjustment of the winding speed and ensuring stable operation. The input end of the reducer 309 is fixedly connected to the power output end of the motor 310, ensuring stable transmission of motor power to the winding reel and sufficient traction power.

[0025] The top frame mechanism 200 also includes a cross arm 202, a reinforcing rib 203, a right-angle connecting plate 204, and a fixing bolt 205. Two cross arms 202 are respectively provided on both sides of the frustum 201, which can enhance the support range and stability of the top frame mechanism. The bottom end of the cross arm 202 is provided with a right-angle connecting plate 204, which facilitates the precise docking of the cross arm and the vertical steel frame. The right-angle connecting plate 204 is close to the outer side of the top of the vertical steel frame 112, which can increase the contact area and improve the connection stability. The fixing bolt 205 connects the right-angle connecting plate 204 and the vertical steel frame 112. The outer side of the frustum 201 and the outer side of the cross arm 202 are also connected with reinforcing ribs 203, which can realize the firm fixation of the top frame mechanism and the base frame assembly, ensuring the stability of the overall structure.

[0026] The base frame assembly 100 also includes a structural frame 107, a connecting bolt 108, a suspension cable 109, a structural frame 110, and a connecting bolt 111. The structural frame 110 is installed on the top of the vertical steel frame 112, and the structural frame 107 is installed on the upper side of the support plate 101 to provide a connection point for the suspension cable. The connecting bolt 108 is installed on the structural frame 107 to facilitate the detachable connection between the suspension cable and the structural frame 1. The connecting bolt 108 is equipped with a connecting plate 1, and the structural frame 110 is threaded with a connecting plate 2, which can improve the connection reliability between the suspension cable and the structural frame. The suspension cable 109 is installed between the connecting plate 1 and the connecting plate 2, which can enhance the overall deformation resistance of the base frame assembly and improve the load-bearing stability of the lifting device.

[0027] The suspension avoidance component allows the replacement box 305 to extend and be suspended on the nacelle, keeping the replacement box 305 away from the receiving plate 101 and the nacelle, thus reducing the probability of the replacement box 305 colliding with the nacelle and other wind power components.

[0028] The specific implementation method is as follows: during the installation and locking stage: the support plate 101 of the base frame assembly 100 is placed on the upper side of the nacelle, and the L-shaped locking bracket 102 is inserted into the locking groove of the support plate 101. The locking bracket 102 is threadedly fixed to the support plate 101 using the locking bolt 103, so that the locking rod at the bottom of the locking bracket 102 is lower than the lower side of the nacelle. The friction element on the lower side of the support plate 101 is used to achieve bidirectional stable locking between the lifting device and the nacelle. Adjustment and alignment stage: According to the position requirements of the box to be replaced 305, adjust the sliding position of the railcar 307 on the arc track 306, and at the same time adjust the installation angle of the top frame mechanism 200 so that the working direction of the winch assembly 300 is adapted to the box replacement requirements; build a traction guide path through the suspension avoidance components such as the S-shaped cantilever frame 303 to ensure that the traction rope 304 can smoothly guide the box to be replaced 305 out of the machine cabin; Lifting and Replacement Stage: Start motor 310, drive winding wheel 308 to wind and unwind traction rope 304 through reducer 309. After being guided by guide roller 302 and cantilever frame 303, traction rope 304 drives the replacement box 305 to be smoothly lifted and moved. With the help of the adjustment function of railcar 307 and top frame mechanism 200, the replacement box 305 is brought to the designated replacement position to complete the dismantling of the old box transformer and the installation of the new box transformer. Throughout the process, suspension avoidance parts keep the replacement box 305 suspended away from the nacelle to avoid collision.

[0029] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A lifting and hoisting tool for replacing prefabricated transformers used in wind power operation and maintenance, characterized in that: The system includes a base frame assembly (100), which includes a support plate (101), a locking frame (102), a locking bolt (103), and a vertical steel frame (112). The support plate (101) has four locking slots evenly distributed on it. A locking frame (102) is inserted into the inner side of each locking slot. A locking bolt (103) is inserted into the top of the locking frame (102). The bottom end of the locking bolt (103) is threaded to the support plate (101). The support plate (101) is placed on the upper side of the cabin. The bottom end of the locking frame (102) is lower than the lower side of the cabin and is connected to a locking rod. Four vertical steel frames (112) are evenly arranged on the upper side of the receiving plate (101), and a top frame mechanism (200) is provided at the top of the vertical steel frames (112). The top of the top frame mechanism (200) is rotatably connected to a winch assembly (300). The winch assembly (300) includes a rotating seat (301), a guide roller (302), a suspension clearance member, and a winding member. The upper side of the rotating seat (301) is rotatably connected to the guide roller (302) via a bracket. A suspension clearance member is provided on one side of the upper side of the rotating seat (301). A winding member is provided on the receiving plate (101). The winding member winds up the traction rope (304). The end of the traction rope (304) away from the winding member is connected to the replacement box (305) after passing through the suspension clearance member.

2. The wind power operation and maintenance transformer replacement lifting tool according to claim 1, characterized in that: The underside of the receiving plate (101) is provided with friction components, including an elastic pad (104), a connecting plate (105) and friction blocks (106). The underside of the receiving plate (101) is provided with an elastic pad (104), which is made of fluororubber. The elastic pad (104) wraps around the connecting plate (105). Several friction blocks (106) are evenly arranged on the underside of the connecting plate (105). The friction blocks (106) pass through the bottom of the elastic pad (104) and are in frictional connection with the top of the cabin.

3. The wind power operation and maintenance transformer replacement lifting tool according to claim 1, characterized in that: Two vertical steel frames (112) located on the front of the receiving plate (101) and two vertical steel frames (112) located on the back of the receiving plate (101) are fixedly equipped with two connecting cross arms (113).

4. The wind power operation and maintenance transformer replacement lifting tool according to claim 1, characterized in that: The suspension avoidance component includes two cantilever frames (303), which are S-shaped. The top of the cantilever frame (303) is fixedly connected to the upper side of the rotating seat (301). A guide roller (302) is connected between the two cantilever frames (303). The cantilever frame (303) and the guide roller (302) are rotatably connected. The traction rope (304) passes through the outside of the guide roller (302) on the cantilever frame (303).

5. The wind power operation and maintenance transformer replacement lifting tool according to claim 1, characterized in that: The winding component includes an arc track (306), a railcar (307), a winding wheel (308), a speed reducer (309), and a motor (310). The arc track (306) is provided on the receiving plate (101). The arc track (306) is slidably connected to the railcar (307). The winding wheel (308) is rotatably connected to the railcar (307). The winding wheel (308) winds up the traction rope (304). The winding wheel (308) is fixedly connected to the output end of the speed reducer (309). The input end of the speed reducer (309) is fixedly connected to the power output end of the motor (310).

6. The wind power operation and maintenance transformer replacement lifting tool according to claim 1, characterized in that: The top frame mechanism (200) also includes a cross arm (202), a reinforcing rib (203), a right-angle connecting plate (204), and a fixing bolt (205). Two cross arms (202) are respectively provided on both sides of the truncated cone (201). A right-angle connecting plate (204) is provided at the bottom of the cross arm (202). The right-angle connecting plate (204) is close to the outer side of the top of the vertical steel frame (112). The fixing bolt (205) connects the right-angle connecting plate (204) and the vertical steel frame (112). A reinforcing rib (203) is also connected to the outer side of the truncated cone (201) and the outer side of the cross arm (202).

7. The wind power operation and maintenance transformer replacement lifting tool according to claim 1, characterized in that: The base frame assembly (100) also includes a structural frame one (107), a connecting bolt one (108), a suspension cable (109), a structural frame two (110), and a connecting bolt two (111). The top of the vertical steel frame (112) is provided with a structural frame two (110), the upper side of the support plate (101) is provided with a structural frame one (107), a connecting bolt one (108) is provided on the structural frame one (107), a connecting plate one is provided on the connecting bolt one (108), a connecting plate two is threadedly connected to the structural frame two (110), and a suspension cable (109) is provided between the connecting plate one and the connecting plate two.

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