Distribution transformer hoisting tool
By designing specialized tools for lifting distribution transformers and employing double clamp fixing and rotation adjustment components, the stability and adaptability issues of existing lifting methods have been resolved, enabling efficient and safe transformer lifting operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2026-03-27
AI Technical Summary
Existing methods for hoisting distribution transformers suffer from poor stability, cumbersome operation, insufficient adaptability, low work efficiency, and high safety risks.
A power distribution transformer hoisting tool was designed, including a pole connection assembly, a load-bearing support assembly, a rotation adjustment assembly, and a hook assembly. It is fixed by radial and vertical double clamps. The rotation adjustment assembly achieves flexible rotation and axial load bearing through deep groove ball bearings and thrust bearings. The hook assembly adopts a fixed and adjustable design to adapt to transformers of different specifications.
It improves the stability and safety of hoisting, reduces manpower input, increases work efficiency, adapts to narrow space operations, and reduces the accident rate.
Smart Images
Figure CN121735149A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of power distribution transformer hoisting technology, and in particular to a power distribution transformer hoisting tool. Background Technology
[0002] In the construction and operation and maintenance of power distribution networks, the hoisting of distribution transformers is a crucial step, and its quality directly affects the stability of power supply and the safety of operation and maintenance. Currently, hoisting and installing distribution transformers generally faces multiple technical challenges, which seriously restrict the efficiency and safety level of the operation.
[0003] First, traditional hoisting tools are mostly general-purpose equipment, lacking specific designs for pole installation scenarios. Their load-bearing capacity is poorly matched with transformer specifications, and the tension of the hoisting ropes is prone to uneven distribution, leading to swaying, displacement, and even equipment deformation during the hoisting process. Furthermore, some tools have simple fixing structures to the poles, relying solely on simple clamps or ropes, which are insufficient to withstand the downward and lateral displacement tendencies caused by the hoisting load, further exacerbating operational risks.
[0004] Secondly, most 10kV distribution transformers are installed in remote locations with narrow hoisting areas, making it impossible for large cranes and other specialized equipment to access the site. When using conventional hoists for hoisting, the transformer support is prone to interference with tools or poles, hindering the up-and-down movement of the equipment. This requires multiple operators to work together to pull and adjust, which is not only time-consuming and labor-intensive but also significantly increases labor costs and the work cycle.
[0005] Furthermore, traditional hoisting tools are mostly fixed structures, making it impossible to adjust the hoisting point position according to the transformer specifications or flexibly change the hoisting orientation. When dealing with transformers of different models and sizes, it is often necessary to change tools or add additional adaptable parts, which is cumbersome and inefficient. At the same time, it is difficult to adjust the angle during hoisting, and the equipment is prone to tilting due to unbalanced forces, which may lead to safety accidents.
[0006] Furthermore, current operations lack standardized tools for controlling hoisting height and securing equipment, relying excessively on the experience and skills of operators. Insufficient personnel skills or improper operation can easily lead to overlooking safety hazards, further increasing the probability of equipment damage and accidents. Summary of the Invention
[0007] Therefore, the technical problem to be solved by the present invention is that the existing methods for hoisting distribution transformers have problems such as poor stability, cumbersome operation, insufficient adaptability, low work efficiency and high safety risks.
[0008] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes a power distribution transformer hoisting tool, which includes a pole connecting assembly; The load-bearing support assembly, the pole connection assembly is used to anchor the lifting tool on the pole, includes a first clamp and a second clamp, the first clamp structure passes through the load-bearing support assembly and is fixed by fasteners, the second clamp is located below the load-bearing support assembly and close to the pole, and is tightened by fastening nuts to achieve vertical reinforcement; A rotation adjustment component is connected to a load-bearing support component, allowing the load-bearing support component to rotate relative to the pole around a preset axis. The hook assembly includes a fixed hook and an adjustable hook, wherein the adjustable hook can move along a preset track of the load-bearing support assembly to adapt to transformers of different specifications.
[0009] In a preferred embodiment of the power distribution transformer hoisting tool of the present invention: the first clamp is a U-shaped clamp, and the U-shaped clamps are distributed at intervals along the height direction of the load-bearing support component to form a multi-point fixation of the load-bearing support component.
[0010] In a preferred embodiment of the distribution transformer hoisting tool of the present invention: the load-bearing support assembly includes a clamp frame disposed on the side walls of the first clamp and the second clamp, and the clamp frame disposed horizontally and vertically is in the shape of a double I.
[0011] In a preferred embodiment of the distribution transformer hoisting tool of the present invention: the clamp frame includes a vertical angle steel disposed on the side wall of the first clamp, a first triangular steel is disposed at the end point and the midpoint of the vertical angle steel, a hollow crossarm is provided on the side wall of the vertical angle steel, and a hole is provided on the crossarm for the first clamp to pass through.
[0012] In a preferred embodiment of the distribution transformer hoisting tool of the present invention: the rotation adjustment assembly includes a tripod disposed on the side wall of the clamp frame, the tripod being a right-angled triangle with a hollow structure, a second triangular steel fixed at the right angle of the tripod; a first round steel is welded to the end of the right-angled long side of the tripod away from the fixed hook, and a second round steel is welded to the end of the right-angled short side of the tripod away from the long side.
[0013] In a preferred embodiment of the distribution transformer hoisting tool of the present invention: the upper ends of the tripod and the clamping frame are fixed to the first round steel with a column flange on the long right angle by bolts, a deep groove ball bearing is sleeved on the outer side of the column flange, and a bearing seat is sleeved on the outer side of the deep groove ball bearing, wherein the bolts fix the bearing seat on the clamping frame.
[0014] In a preferred embodiment of the distribution transformer hoisting tool of the present invention: the lower ends of the tripod and the clamping frame are fixed to the second round steel with a column flange on the short right-angle side by bolts; a deep groove ball bearing and a thrust bearing are sequentially sleeved on the outer side of the column flange; the outer side of the thrust bearing is connected to the sleeve bearing seat; and the bolts fix the bearing seat to the clamping frame.
[0015] In a preferred embodiment of the power distribution transformer hoisting tool of the present invention: the hook assembly includes a U-shaped adjustable hook disposed on the side wall of the diagonal brace of the tripod, the U-shaped adjustable hook being movable along the through hole on the diagonal side of the tripod.
[0016] In a preferred embodiment of the distribution transformer hoisting tool of the present invention: the thrust bearing is used to bear the axial load and transmits the axial force sequentially through the shaft ring, rolling element, and seat ring to the bearing housing and clamp frame.
[0017] In a preferred embodiment of the power distribution transformer hoisting tool of the present invention: a hand-operated hoist is provided in the middle of the fixed hook, and the hand-operated hoist is connected to the transformer by a rope; The clamps and tripods are both made of steel, and the first and second triangular steels are fixed to the corresponding connecting parts by welding.
[0018] The beneficial effects of this invention are as follows: The use of radial and vertical double clamps for fixing, with the first clamp fixing at multiple points along the height of the load-bearing component and the second clamp providing vertical reinforcement below, firmly anchors the tool to the pole, distributing the load to prevent deformation and eliminating the risk of tool displacement and transformer falling; the rotating adjustment component uses deep groove ball bearings and thrust bearings in tandem, allowing for flexible rotation at the upper end and bearing axial load at the lower end, working in conjunction with a hand-operated hoist for smooth lifting and lowering, avoiding hoisting jams and swaying, and reducing the accident rate.
[0019] The integrated system combines four functional modules, eliminating the need for temporary structural construction. The entire process can be completed by 2-3 people, reducing manpower input. The rotating adjustment component allows the transformer to rotate freely around the pole, saving the trouble of repeated disassembly and adjustment, shortening the orientation adjustment time, improving overall work efficiency, and making it suitable for rapid operation in remote locations.
[0020] The design features both fixed and adjustable hooks. The adjustable hooks can be moved along the diagonal side of the tripod to accommodate transformers of different specifications without the need for special tools. The core components are made of high-strength steel, and the overall size is compact. No crane is required, and it can operate in narrow and remote locations, thus expanding its applicable scenarios. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 A schematic diagram of the overall installation structure of the power distribution transformer hoisting tool is shown. Figure 2 A schematic diagram of the overall structure of the power distribution transformer hoisting tool is shown. Figure 3A side view of the overall structure of the distribution transformer hoisting tool is shown; Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 A cross-sectional view of the bearing housing of a power distribution transformer hoisting tool is shown.
[0022] Figure 6 A schematic diagram of the tripod structure for hoisting distribution transformers is shown. Detailed Implementation
[0023] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.
[0024] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.
[0025] Reference Figure 1 This embodiment provides a power distribution transformer hoisting tool, which addresses the problem of traditional hoisting requiring multiple people and being inefficient. Its core components include a pole connection assembly 1, a load-bearing support assembly 2, a rotation adjustment assembly 3, and a hook assembly 4. The components work together to achieve stable, flexible, and efficient hoisting operations.
[0026] The pole connection assembly 1 is the core functional module that establishes a stable connection between the hoisting tool and the pole. It plays a key role in anchoring the tool to the pole and transferring the hoisting load to the pole. It can prevent the tool from shifting or shaking due to load displacement during hoisting and provide basic support for subsequent hoisting operations. The load-bearing support assembly 2 is the intermediate load-bearing structure connecting the pole connecting assembly 1 with the subsequent rotation adjustment assembly 3 and hook assembly 4. It needs to bear the fixing force transmitted by the pole connecting assembly 1 and the gravity load during transformer hoisting. The core function of the pole connecting assembly 1 is to firmly anchor the entire hoisting tool to the pole through the double clamp structure to prevent the tool from falling off or shifting. This assembly specifically includes two key components: the first clamp 11 and the second clamp 12.
[0027] The pole connection assembly 1 is used to anchor the hoisting tool on the pole. It includes a first clamp 11 and a second clamp 12. The first clamp 11 is structured through the load-bearing support assembly 2 and fixed by fasteners 13. The second clamp 12 is located below the load-bearing support assembly 2 and is close to the pole. Vertical reinforcement is achieved by tightening the fastening nut. The first clamp 11 adopts a through-type installation structure, which needs to pass through the preset installation hole on the load-bearing support component 2, and after wrapping around the pole, it is tightened and fixed by fastener 13 to ensure that there is no loose gap between the clamp and the pole, and between the clamp and the load-bearing support component 2, thus forming a reliable radial constraint. The second clamp 12 is installed below the load-bearing support component 2 and must be close to the side wall of the pole. By tightening the fastening nut, the clamp tightly wraps around the pole. Its core function is to form a vertical reinforcement effect, which can resist the downward tendency of the load-bearing support component 2 due to the weight of the transformer. Together with the first clamp 11, it forms a radial and vertical double fixing system.
[0028] Rotary adjustment component 3 is connected to load-bearing support component 2, allowing the load-bearing support component 2 to rotate relative to the pole around a preset axis. Through the design of this component, the load-bearing support component 2 can drive the hook component 4 and the transformer to rotate flexibly relative to the pole around a preset vertical axis, thereby avoiding the pole or surrounding obstacles and accurately adjusting the transformer to the target installation position, solving the problem of difficult traditional hoisting position adjustment. Hook assembly 4 includes a fixed hook 41 and an adjustable hook 42. The adjustable hook 42 can move along the preset track of the load-bearing support assembly 2 to adapt to transformers of different specifications. Hook assembly 4 is a functional module that directly connects to the transformer and transmits lifting force. To adapt to transformers of different weights and different lifting point positions, it adopts a fixed and adjustable double hook design, specifically including a fixed hook 41 and an adjustable hook 42. The fixed hook 41 is a fixed connection structure in a preset position, suitable for transformers with relatively standard specifications and fixed lifting point positions. The adjustable hook 42 is designed with a preset track, which can move flexibly along the track and be fixed in different positions. By adjusting its relative distance with the fixed hook 41, it meets the connection requirements of transformers of different specifications and improves the versatility of the tool.
[0029] Reference Figures 1-4As an optional embodiment, the first clamp 11 is a U-shaped clamp. This structure can wrap around the pole through the open end, and the screws at both ends pass through the holes of the load-bearing support component 2 and are fixed with nuts. It has the advantages of convenient installation and uniform clamping force. In order to further improve the fixing stability, the U-shaped clamp is not installed at a single point, but is distributed at intervals along the height direction of the load-bearing support component 2. Multiple U-shaped clamps work together to form a multi-point fixing effect on the load-bearing support component 2, avoiding deformation or loosening of the component due to excessive force at a single point. The U-shaped clamps are distributed at intervals along the height direction of the load-bearing support component 2 to jointly form a multi-point fixing effect on the load-bearing support component 2.
[0030] The load-bearing support component 2 includes a clamp frame 21 set on the side wall of the first clamp 11 and the second clamp 12, which is fixed to the pole by the clamping force. In terms of structural form, the clamp frame 21 adopts a combination design of horizontal and vertical components. After the vertical and horizontal components are connected to each other, the whole structure forms a double I shape. This structure can reduce its own weight while improving the overall resistance to bending and deformation, ensuring that it can stably bear the gravity load of the transformer.
[0031] The clamp frame 21 includes a vertical angle steel 211 set on the side wall of the first clamp 11, a first triangular steel 212 set at the end point and the midpoint of the vertical angle steel 211, and a hollow crossbeam 213 is provided on the side wall of the vertical angle steel 211, and a hole 214 is opened on the crossbeam 213 for the first clamp 11 to pass through. The vertical angle steel 211 is the vertical load-bearing frame of the clamp frame 21. It is installed on the side wall of the first clamp 11 and is tightly attached to the pole by the clamp's fastening force. It mainly bears the vertical load. To prevent the vertical angle steel 211 from deforming due to its large span, a first triangular steel 212 is additionally set at its end point and midpoint. The triangular steel is fixed to the vertical angle steel by welding, and the stability characteristics of the triangle are used to enhance the structural strength of the vertical angle steel. On the side wall of the vertical angle steel 211, a hollow crossbeam 213 is set in the horizontal direction. The hollow structure can reduce weight while ensuring load-bearing capacity. The core function of the crossbeam 213 is to provide the installation foundation for the first clamp 11. Therefore, holes 214 are pre-drilled in the crossbeam 213 for the screw part of the first clamp 11 to pass through. The position of the holes matches the spacing of the first clamp to ensure that the clamp can be installed accurately.
[0032] Reference Figures 5-6In one embodiment provided in this application, the rotation adjustment assembly 3 includes a tripod 31 disposed on the side wall of the clamp frame 21. The tripod 31 is a right-angled triangle with a hollow structure. A second triangular steel 32 is fixed at the right angle of the tripod 31. A first round steel 34 is welded to the end of the right-angled long side of the tripod 31 away from the fixed hook 41, and a second round steel 35 is welded to the end of the right-angled short side of the tripod 31 away from the long side. The tripod 31 is a right-angled triangle with a hollow structure, which minimizes its own weight and reduces the load on the clamp frame 21 while ensuring that the load-bearing capacity meets the requirements. Considering that the right angle of a right triangle is the point of force concentration, a second triangular steel 32 is fixed at this position to further enhance the shear resistance and deformation resistance at the right angle. In order to achieve a rotatable connection with the clamp frame 21, round steel components are welded at two key positions of the tripod 31: a first round steel 34 is welded to the end of the long side of the right angle away from the fixed hook 41, which serves as the basic component for connecting the upper end of the tripod to the clamp frame; a second round steel 35 is welded to the end of the short side of the right angle away from the long side, which serves as the basic component for connecting the lower end of the tripod to the clamp frame.
[0033] The upper ends of the tripod 31 and the clamp frame 21 are fixed to the first round steel 34 on the long right-angle side by bolts 36. A deep groove ball bearing 38 is fitted on the outside of the column flange 37, and a bearing seat 39 is fitted on the outside of the deep groove ball bearing 38. The bearing seat 39 is fixed to the clamp frame 21 by bolts 36. First, the column flange 37 is fixed to the end of the first round steel 34 on the long right-angle side of the tripod 31 by bolts 36 to ensure that there is no relative rotation between the flange and the round steel. On the outer cylindrical part of the column flange 37, the deep groove ball bearing 38 is fitted, so that the flange can rotate flexibly relative to the bearing. Then, the bearing seat 39 is fitted on the outside of the deep groove ball bearing 38 to fix the bearing position and transfer the load. Finally, the bearing seat 39 is fixed to the preset installation position of the clamp frame 21 by bolts 36, thereby realizing the rotatable connection between the upper end of the tripod 31 and the clamp frame 21, and the connection structure is stable and free from jamming.
[0034] The lower ends of the tripod 31 and the clamp 21 are fixed to the second round steel 35 on the short right-angle side by bolts 36. The outer side of the flange 37 is sequentially fitted with a deep groove ball bearing 38 and a thrust bearing A. The outer side of the thrust bearing A is connected to the sleeve bearing seat 39. The bolts 36 fix the bearing seat 39 to the clamp 21. The column flange 37 is fixed to the end of the second round steel 35 on the short right-angle side of the tripod 31 by bolts 36 to ensure a firm connection. Unlike the upper structure, on the outer cylindrical part of the column flange 37, a deep groove ball bearing 38 is first fitted, and then a thrust bearing A, specifically designed to bear axial loads, is fitted on the outside of the deep groove ball bearing 38. Finally, the bearing housing 39 is fitted on the outside of the thrust bearing A and fixed to the clamp frame 21 by bolts 36. This design allows the thrust bearing A to bear the axial pressure generated by the weight of the transformer on the tripod 31, preventing the deep groove ball bearing from being damaged due to bearing the axial load alone, thus improving the service life and stability of the connection structure.
[0035] Reference Figure 3 and Figure 6 In some embodiments, the hook assembly 4 includes a U-shaped adjustable hook 42 disposed on the side wall of the diagonal brace of the tripod 31. The U-shaped adjustable hook 42 can move along the through holes on the hypotenuse of the tripod 31. The open end of the U-shaped hook can be used to connect the lifting rope or lifting ring of the transformer, while the closed end cooperates with the diagonal brace of the tripod 31. To achieve the adjustment function, equidistant through holes are pre-drilled on the diagonal brace of the tripod 31, i.e., the hypotenuse of the right triangle, to form a preset track. The closed end of the U-shaped adjustable hook 42 can pass through the through holes and be fixed by nuts or buckles. During operation, the U-shaped adjustable hook 42 can be moved along the through hole track to a suitable position according to the specifications of the transformer and then re-fixed to ensure that the hook can be accurately aligned with the lifting point of the transformer, thereby improving the stability of the lifting.
[0036] Thrust bearing A is used to bear axial loads, transmitting the axial force sequentially through the shaft ring, rolling elements, and housing ring to the bearing housing 39 and clamp 21. Thrust bearing A plays a crucial role in the entire connection structure in bearing and transmitting axial loads. When the tripod 31 bears the weight of the transformer, it generates vertical axial pressure. This axial force first acts on the shaft ring of thrust bearing A, which then transmits the axial force evenly to the housing ring through its internal rolling elements such as balls and rollers. The housing ring then transmits the axial force to the bearing housing 39, which is fixed to it, and finally from the bearing housing 39 to the clamp 21, and then through the clamp to the pole. This process achieves the gradual dispersion and transmission of axial force, preventing damage to local components due to concentrated stress.
[0037] A hand-operated hoist 43 is installed in the middle of the fixed hook 41, and the hand-operated hoist 43 is connected to the transformer via a rope. The hand-operated hoist 43 is installed in the middle of the fixed hook 41 of the hook assembly 4, and it is the power source for the hoisting operation. The upper hook of the hand-operated hoist 43 is connected and fixed to the fixed hook 41, and the lower end is connected to the preset hoisting point of the transformer via a high-strength lifting rope. During operation, the operator can control the rope's release and retraction by pulling the chain of the hand-operated hoist 43, thereby achieving smooth lifting and lowering of the transformer. The hand-operated hoist has a self-locking function, which can stop and fix the transformer at any height, preventing the transformer from falling due to the operator letting go, thus improving the safety of hoisting.
[0038] Both the clamp frame 21 and the tripod 31 are made of steel, and the first triangular steel 212 and the second triangular steel 32 are fixed to the corresponding connecting parts by welding. To ensure that the load-bearing capacity meets the hoisting requirements of the distribution transformer, both the clamp frame 21 and the tripod 31 are made of high-strength steel. This type of steel has high tensile strength and bending strength, and can withstand the load impact and deformation during the hoisting process.
[0039] Meanwhile, to ensure the connection strength between the first triangular steel 212, the second triangular steel 32 and the corresponding connecting parts, welding is used for fixing. The welded joints must be free of false welds and leaks to form an integrated structure and avoid the overall structure from becoming unstable due to loose connections.
[0040] During installation, a flat and secure installation location should be selected on the pole. The clamp 21 of the load-bearing support component 2 should be attached to the side wall of the pole, and the hole 214 on the hollow crossarm 213 of the clamp 21 should be aligned with the preset installation position.
[0041] The first clamp 11 is passed through the holes 214 at intervals along the height direction of the clamp frame 21, and after wrapping around the pole, it is evenly tightened by the fastener 13 to achieve multi-point fixation of the clamp frame 21, ensuring that the clamp and the pole are tightly fitted without any loose gaps.
[0042] A second clamp 12 is installed below the clamp 21, close to the pole. The clamp is slowly tightened by tightening the nuts to form a vertical reinforcement constraint and resist the downward tendency of the clamp due to the subsequent hoisting load.
[0043] Check the connection between the tripod 31 and the clamp frame 21. The upper end, which is fixed by bolts 36, has the column flange 37, deep groove ball bearing 38 and bearing seat 39 in place. The lower end has the column flange 37, deep groove ball bearing 38, thrust bearing A and bearing seat 39 connected without jamming. Manually push the tripod 31 to confirm that it can rotate flexibly around the preset axis of the pole without jamming or abnormal noise.
[0044] Then, according to the specifications of the transformer to be hoisted, adjust the adjustable hook 42 of the hook assembly 4, move the adjustable hook 42 along the preset perforated track on the inclined side of the tripod 31, and fix it at the position that matches the hoisting point of the transformer to ensure that the hook is subjected to balanced force.
[0045] If the transformer specifications are compatible with the position of the fixed hook 41, the fixed hook 41 can be used directly for connection without adjusting the adjustable hook 42.
[0046] Securely connect the hand chain hoist 43 to the pre-set lifting point of the transformer using ropes, ensuring that the ropes are tightly bound, there is no risk of slippage, and the rope tension is evenly distributed. If a fixed hook 41 and an adjustable hook 42 are used for lifting, it is necessary to ensure that both hooks are under force simultaneously and that the transformer remains horizontal.
[0047] Subsequently, the operators worked together to push the tripod 31, and through the flexible rotation characteristics of the rotation adjustment component 3, adjusted the connected transformer to the preset hoisting position, avoiding the power pole and surrounding obstacles.
[0048] Furthermore, a designated person operates the chain hoist 43 to slowly and steadily pull the chain, gradually raising the transformer while maintaining a constant speed to avoid sudden pulling or stopping.
[0049] Another worker observes the transformer's condition throughout the process, ensuring it remains level, that the ropes are not loose, and that there are no abnormal deformations or displacements at the tool connections. If any problems are found, the lifting is stopped immediately, and the issue is investigated and resolved before continuing.
[0050] After the transformer is raised to the designated installation height, the position of the transformer is finely adjusted by rotating the tripod 31 to make it precisely aligned with the installation reference.
[0051] After the transformer is stably in place, the operators quickly complete the fixed connection between the transformer and the pole mounting base. After confirming that it is firmly fixed, the chain of the hand chain hoist 43 is slowly loosened to disconnect the hook from the transformer.
[0052] After installation, first remove the fastening nut of the second clamp 12 and take off the second clamp 12; then loosen the fastener 13 of the first clamp 11 and separate the first clamp 11 from the clamp frame 21; finally, remove the connecting bolts of the hook assembly 4, the rotation adjustment assembly 3 and the clamp frame 21 in sequence and disassemble each component.
[0053] Clean the dust and debris from the surface of each component, check for wear and tear, maintain or replace easily worn parts, and then store them according to component categories to prevent rust and damage.
[0054] During the hoisting process, workers are strictly prohibited from standing under the transformer or in the hoisting area to prevent injury from falling objects.
[0055] When operating a chain hoist, the lifting speed must be controlled to avoid excessive transformer swaying, which could lead to uneven stress on the tool. If strong winds, thunderstorms, or other severe weather occur during hoisting, work should be stopped immediately. The transformer should be lowered to a safe position and secured, and operations resumed only after the weather improves. After each use, the tool should be regularly inspected and maintained, especially load-bearing components such as bearings, bolts, and clamps, to ensure safety and reliability for future use.
[0056] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.
Claims
1. A lifting tool for a distribution transformer, characterized in that: include, Pole connection assembly (1); The load-bearing support assembly (2) and the pole connection assembly (1) are used to anchor the hoisting tool on the pole. The assembly includes a first clamp (11) and a second clamp (12). The first clamp (11) is structurally connected through the load-bearing support assembly (2) and fixed by fasteners (13). The second clamp (12) is located below the load-bearing support assembly (2) and close to the pole. Vertical reinforcement is achieved by tightening the fastening nut. Rotation adjustment component (3), which is connected to load-bearing support component (2), so that load-bearing support component (2) can rotate relative to the pole around a preset axis; The hook assembly (4) includes a fixed hook (41) and an adjustable hook (42). The adjustable hook (42) can move along the preset track of the load-bearing support assembly (2) to adapt to transformers of different specifications.
2. The power distribution transformer hoisting tool according to claim 1, characterized in that: The first clamp (11) is a U-shaped clamp, and its U-shaped clamps are distributed at intervals along the height direction of the load-bearing support component (2) to form a multi-point fixation of the load-bearing support component (2).
3. The power distribution transformer hoisting tool according to claim 2, characterized in that: The load-bearing support assembly (2) includes a clamp frame (21) set on the side wall of the first clamp (11) and the second clamp (12), and the clamp frame (21) set horizontally and vertically is in the shape of a double I.
4. The power distribution transformer hoisting tool according to claim 3, characterized in that: The clamp frame (21) includes a vertical angle steel (211) set on the side wall of the first clamp (11). A first triangular steel (212) is set at the end point and the midpoint of the vertical angle steel (211). A hollow crossbeam (213) is provided on the side wall of the vertical angle steel (211). A hole (214) is opened on the crossbeam (213) for the first clamp (11) to pass through.
5. The power distribution transformer hoisting tool according to claim 4, characterized in that: The rotating adjustment assembly (3) includes a tripod (31) set on the side wall of the clamp frame (21). The tripod (31) is a right triangle and has a hollow structure. A second triangular steel (32) is fixed at the right angle of the tripod (31). A first round steel (34) is welded to the end of the right angle of the tripod (31) away from the fixed hook (41). A second round steel (35) is welded to the end of the right angle of the tripod (31) away from the long side.
6. The power distribution transformer hoisting tool according to claim 5, characterized in that: The upper ends of the tripod (31) and the clamping frame (21) are fixed to the first round steel (34) on the long right-angle side by bolts (36). The outer side of the column flange (37) is fitted with a deep groove ball bearing (38), and the outer side of the deep groove ball bearing (38) is fitted with a bearing seat (39). The bolts (36) fix the bearing seat (39) on the clamping frame (21).
7. The power distribution transformer hoisting tool according to claim 6, characterized in that: The lower ends of the tripod (31) and the clamp frame (21) are fixed to the second round steel (35) with the right angle short side by bolts (36). The outer side of the flange (37) with the column is fitted with a deep groove ball bearing (38) and a thrust bearing (A). The outer side of the thrust bearing (A) is connected to the sleeve bearing seat (39). The bolts (36) fix the bearing seat (39) on the clamp frame (21).
8. The power distribution transformer hoisting tool according to claim 7, characterized in that: The hook assembly (4) includes a U-shaped adjustable hook (42) disposed on the side wall of the diagonal brace of the tripod (31), the U-shaped adjustable hook (42) being movable along the perforation of the diagonal side of the tripod (31).
9. The power distribution transformer hoisting tool according to claim 8, characterized in that: The thrust bearing (A) is used to bear axial loads and transmits the axial force sequentially through the shaft ring, rolling elements, and seat ring to the bearing housing (39) and clamp (21).
10. The power distribution transformer hoisting tool according to claim 9, characterized in that: A hand chain hoist (43) is provided in the middle of the fixed hook (41), and the hand chain hoist (43) is connected to the transformer by a rope; The clamp frame (21) and tripod (31) are both made of steel, and the first triangular steel (212) and the second triangular steel (32) are fixed to the corresponding connecting parts by welding.