Combined lifting device for dry-type transformer

Abstract

This utility model relates to the field of transformer transportation technology, specifically disclosing a combined lifting tool for dry-type transformers, comprising: a first support, a second support, connecting components, and hooks. The first and second supports are symmetrically arranged and fixedly connected by several connecting components. Both the first and second supports are provided with oppositely positioned hanging hole groups, and there are multiple hooks, the top of which hooks are hooked into the hanging holes of the hanging hole group, and the bottom of the hooks are used to hook and connect to the top of the dry-type transformer. This combined lifting tool for dry-type transformers has the advantages of improving the safety of the lifting process, effectively avoiding damage to the internal structure of the dry-type transformer, ensuring the integrity of insulation performance, and extending the service life of the equipment.

Description

Technical Field

[0001] This application relates to the field of transformer transportation technology, and more specifically, to a combined lifting device for dry-type transformers. Background Technology

[0002] Dry-type transformers, as key equipment in power transmission and distribution systems, are widely used in industrial, commercial, and infrastructure sectors. With the power industry moving towards higher efficiency and intelligence, hoisting operations have become a crucial part of equipment installation and maintenance. The industry is actively promoting the standardization and innovation of hoisting tools to improve operational safety and convenience, meet the needs of transferring large, high-value equipment, and promote the stable operation and sustainable development of power infrastructure.

[0003] However, traditional hoisting methods have significant shortcomings. Directly using hooks to move dry-type transformers can easily generate horizontal compressive forces, causing mechanical damage to the transformer body, leading to internal structural deformation or decreased insulation performance, and shortening the equipment's lifespan. This compressive stress is difficult to detect in a timely manner, increasing maintenance difficulty and potential failure risks, and causing significant economic losses. Existing hoisting solutions, such as simple hooks or rope fixation, while achieving basic transfer functions, cannot effectively disperse or buffer horizontal stress, increasing the probability of equipment damage and hindering improvements in hoisting efficiency and equipment reliability.

[0004] There is currently no effective technical solution to the above problems. Utility Model Content

[0005] The purpose of this application is to provide a combined lifting tool for dry-type transformers to improve the safety of the lifting process, avoid damage to the internal structure of the dry-type transformer, ensure the integrity of insulation performance, and extend the service life of the equipment.

[0006] This application provides a combined lifting device for a dry-type transformer, including: a first support, a second support, a connecting component, and hooks. The first support and the second support are symmetrically arranged and fixedly connected by a plurality of the connecting components. Both the first support and the second support are provided with a group of hanging holes in opposite positions. There are multiple hooks, the top of which are hooked into the hanging holes of the group of hanging holes, and the bottom of the hooks are used to hook and connect to the top of the dry-type transformer.

[0007] The combined lifting device for the dry-type transformer, wherein the first support and the second support are both vertically arranged metal plates.

[0008] The combined lifting device for the dry-type transformer has horizontally arranged insertion ports in the middle of both the first and second supports for cooperating with forklift forks.

[0009] The combined lifting device for the dry-type transformer, wherein the socket is rectangular.

[0010] The combined lifting device for the dry-type transformer, wherein the socket is positioned at the middle height of either the first or the second bracket.

[0011] The combined lifting device for the dry-type transformer includes at least four connecting components, with at least two connecting components positioned above the socket and at least two connecting components positioned below the socket.

[0012] The combined lifting device for the dry-type transformer, wherein the minimum distance between adjacent connecting components located above the socket is greater than the minimum distance between adjacent connecting components located below the socket.

[0013] The combined lifting device for the dry-type transformer, wherein the number of hanging holes in the hanging hole group is greater than the number of connecting components, and the connecting components are fixedly connected to the first bracket and the second bracket by being installed in the hanging holes of the hanging hole group.

[0014] The combined lifting device for the dry-type transformer includes a connecting assembly comprising a screw and nuts. The two ends of the screw are inserted into the hanging holes of the first bracket and the second bracket, and are clamped and fixed to the first bracket and the second bracket by a plurality of nuts.

[0015] The combined lifting device for the dry-type transformer, wherein the hooks are at least four in number and are S-shaped hooks.

[0016] As can be seen from the above, the combined lifting tool for dry-type transformers provided in this application, through the design of a symmetrical support structure and the synergistic effect of the hanging hole group and hook, ensures that the force on the top of the dry-type transformer is evenly distributed. This avoids the problem of internal core displacement or winding deformation caused by the direct action of horizontal extrusion force on the equipment shell in traditional lifting methods. It has the advantages of improving the safety of the lifting process, effectively avoiding damage to the internal structure of the dry-type transformer, ensuring the integrity of insulation performance, and extending the service life of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the combined lifting device for a dry-type transformer provided in an embodiment of this application.

[0018] Figure 2 This is a schematic diagram of the structure of the combined lifting device for a dry-type transformer provided in the embodiments of this application, when used in conjunction with a forklift and a dry-type transformer.

[0019] Reference numerals: 1. First bracket; 2. Second bracket; 3. Connecting component; 4. Hook; 11. Hanging hole; 12. Insert; 31. Screw; 32. Nut. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0025] Please refer to Figure 1 and Figure 2 Some embodiments of this application provide a combined lifting device for a dry-type transformer, including: a first support 1, a second support 2, a connecting component 3 and a hook 4. The first support 1 and the second support 2 are symmetrically arranged and fixedly connected by a number of connecting components 3. The first support 1 and the second support 2 are each provided with a hanging hole group in opposite positions. There are multiple hooks 4, the top of which is hooked into the hanging hole 11 of the hanging hole group, and the bottom of the hook 4 is used to hook and connect to the top of the dry-type transformer.

[0026] Specifically, the hanging hole assembly can be understood as a series of holes set on the first bracket 1 and the second bracket 2, used for attaching the hooks 4 and the crane hooks. The connecting component 3 refers to the part used to fix and connect the first bracket 1 and the second bracket 2. It can be achieved by welding, riveting, or pin connection, such as using a snap-fit ​​structure or hinge device. Its main purpose is to provide overall structural rigidity and prevent relative displacement of the brackets during hoisting. The hook 4 refers to the hook used to connect the lifting device and the dry-type transformer. It can be achieved by bending a metal rod or casting a hook, such as a J-hook or C-hook. Its main purpose is to distribute the hoisting load and reduce stress concentration at individual connection points.

[0027] More specifically, this embodiment of the application, through the symmetrical arrangement of the first support 1 and the second support 2, the fixed connection of the connecting component 3, and the cooperation of the hanging hole group and multiple hooks 4, disperses the horizontal stress during the hoisting process, avoiding direct compression of the dry-type transformer body, thereby solving the problem of mechanical damage and protecting the internal structure and insulation performance. Specifically, this technical solution ensures that the hoisting force is evenly applied to the top of the transformer, eliminating the risk of deformation caused by horizontal compression in traditional methods, and improving the safety and reliability of the hoisting operation.

[0028] More specifically, the combined lifting device for the dry-type transformer of this application includes a first support 1, a second support 2, connecting components 3, and hooks 4. The first support 1 and the second support 2 are symmetrically arranged and fixedly connected by several connecting components 3. This symmetrical structural design ensures that the force applied during lifting is evenly distributed, thereby effectively reducing the risk of horizontal compression caused by force eccentricity and avoiding mechanical deformation caused by asymmetrical stress on the transformer shell. The oppositely positioned hanging hole groups are respectively set on the first support 1 and the second support 2. Their precise correspondence allows the hooks 4 to be symmetrically hooked into the hanging holes 11, thereby achieving multiple connection points to collaboratively share the load and prevent excessive local pressure caused by concentrated force at a single point. There are multiple hooks 4, with their top ends hooking into the hanging holes 11 of the hanging hole group, and their bottom ends used to hook onto the standard lifting points on the top of the dry-type transformer. This top connection method avoids the direct side compression of the transformer body in traditional lifting, protecting the internal insulation structure and core components from damage. The entire structural design supports hoisting and transfer via the mounting holes 11 with a crane or forklift, ensuring that stress is reasonably managed under different operating scenarios and improving the stability and controllability of the transfer process.

[0029] Therefore, the horizontal compressive force during hoisting is effectively distributed to multiple hooks 4 and the support structure, significantly reducing the load strength of individual connection points and buffering the transmission of horizontal impact forces. This design fundamentally avoids the direct action of horizontal compressive force on the transformer body, preventing internal structural deformation and insulation performance degradation, improving the safety of hoisting operations and the reliability of equipment transfer, and ensuring that dry-type transformers are protected from mechanical damage risks during installation and maintenance.

[0030] In some preferred embodiments, both the first support 1 and the second support 2 are vertically arranged metal plates.

[0031] Specifically, vertical installation means that the installation direction of the support is strictly perpendicular to the horizontal plane. This can be achieved by using a precise vertical installation method. The purpose is to ensure that the hoisting force line is transmitted in the vertical direction and avoid generating horizontal component forces. Metal plate components refer to flat plate structures made of high-rigidity metal materials. These can be made of materials such as steel plates or aluminum alloy plates. The purpose is to provide sufficient structural strength to prevent bending or twisting under hoisting loads.

[0032] Specifically, the solution of this application sets the first bracket 1 and the second bracket 2 as vertical metal plates, so that the bracket can maintain a strictly vertical posture during the hoisting process, thereby ensuring that the force is directly transmitted to the connecting component 3 and the hook 4 in the vertical direction; the high rigidity of the metal plate ensures that the bracket as a whole is not prone to elastic deformation or plastic yielding, and can evenly distribute the load to the hanging hole group and the connecting component 3, avoiding stress concentration caused by local softening, while eliminating the horizontal component force generated by the tilt angle of the bracket, so that the lifting device can stably maintain a symmetrical support state when used with a crane for hoisting or forklift transfer.

[0033] Through the above solution, this application can effectively prevent the support from bending or twisting during hoisting, ensure that the horizontal stress is fully dispersed, avoid applying compressive force to the dry-type transformer body, thereby protecting the internal structure and insulation performance, reducing the risk of equipment damage and maintenance difficulty.

[0034] In some preferred embodiments, both the first bracket 1 and the second bracket 2 are provided with horizontally arranged insertion ports 12 for cooperating with forklift forks, so that the dry-type transformer can be lifted and transferred by inserting the forklift forks into the insertion ports 12.

[0035] Specifically, the socket 12 refers to an opening structure on the bracket for inserting and engaging the forklift fork arm. It can be rectangular, circular, or elliptical in shape, depending on the size of the forklift fork arm and the operating environment. The horizontal setting of the socket 12 means that the extension direction of the socket 12 is parallel to the horizontal plane. It can be designed to be completely horizontal or have a slight tilt angle to adapt to the operating needs of different forklift types. The socket 12 is located near the center of gravity area in the height direction of the bracket. It can be set at approximately the middle of the bracket height to ensure uniform force distribution during lifting.

[0036] Specifically, the solution of this application sets the socket 12 in the middle of the first bracket 1 and the second bracket 2, so that the point of action of the forklift arm when inserted is close to the center of gravity of the dry-type transformer, avoiding torsional stress caused by eccentric load, thereby reducing the risk of squeezing the transformer shell; at the same time, the symmetrical layout of the socket 12 on both brackets allows the forklift arm to act on both brackets at the same time, evenly distributing the horizontal thrust and preventing local deformation caused by unilateral force; the horizontal setting of the socket 12 matches the horizontal propulsion trajectory of the forklift arm, reducing frictional resistance and impact force during insertion and buffering potential horizontal stress impact; the direct cooperation between the dedicated socket 12 and the forklift arm eliminates the need for additional conversion tools, ensuring a more direct and evenly distributed force transmission path, avoiding stress concentration caused by point contact, thereby changing the force mode during the transfer process from composite stress to a controllable vertical lifting force.

[0037] Through the above solution, this application achieves stable cooperation between the forklift fork and the lifting device, effectively disperses the horizontal compressive force, avoids mechanical damage to the transformer body, reduces the risk of internal structural deformation and insulation performance degradation, and improves the safety and reliability of lifting and transfer.

[0038] In some preferred embodiments, the socket 12 is a rectangular opening.

[0039] Specifically, the solution of this application defines the socket 12 as a rectangular shape, so that the forklift fork arm can form a continuous surface contact with the inner wall of the socket 12 during insertion, rather than point contact or line contact; this geometric matching mechanism effectively constrains the relative displacement between the fork arm and the socket 12 during hoisting and transfer, so that the load is evenly distributed along the rectangular boundary, thereby eliminating the adverse effects of horizontal compressive force on the dry-type transformer body.

[0040] Through the above solution, this application achieves reliable engagement between the forklift fork arm and the socket 12, effectively preventing the risk of mechanical damage caused by unstable engagement during hoisting, and ensuring the safety of the dry-type transformer transfer operation and the integrity of the equipment structure.

[0041] In some preferred embodiments, the socket 12 is positioned at the middle height of the first bracket 1 or the second bracket 2.

[0042] Specifically, the setting height of the socket 12 refers to the vertical positioning reference of the forklift arm insertion position. Its purpose is to ensure that the stress point is strictly aligned with the center of gravity of the transformer during the hoisting process, thereby eliminating tilting and horizontal stress concentration caused by height deviation.

[0043] Through the above-mentioned solution, this application effectively prevents the transformer from shaking and shifting during operation, reduces the possibility of mechanical damage, and ensures the structural integrity and long-term operational reliability of the equipment during the transfer process.

[0044] In some preferred embodiments, there are at least four connecting components 3, with at least two connecting components 3 positioned above the socket 12 and at least two connecting components 3 positioned below the socket 12, in order to improve the stability of the structurally combined lifting device.

[0045] Specifically, setting at least four connection components 3 provides sufficient fixing points to enhance the basic connection strength between the supports and prevent structural loosening due to insufficient number of connection points.

[0046] Specifically, the solution of this application distributes the connecting components 3 above and below the socket 12, so that when the forklift fork arm inserts into the middle socket 12 to lift the dry transformer, the connecting components 3 above the socket 12 effectively share the downward torque and reduce the bending deformation at the top, while the connecting components 3 below the socket 12 balance the upward stress and suppress the tilting trend, thus achieving a reasonable distribution of the force path as a whole.

[0047] In some preferred embodiments, the minimum distance between adjacent connecting components 3 located above the socket 12 is greater than the minimum distance between adjacent connecting components 3 located below the socket 12.

[0048] Specifically, the solution of this application makes the layout of the connecting components 3 in the area below the socket 12 more dense by setting the spacing distribution of the connecting components 3 differently, thereby enhancing the ability of this area to disperse the concentrated load generated when the forklift fork arm is inserted and effectively suppressing the local deformation trend; at the same time, the spacing of the connecting components 3 in the area above the socket 12 is increased, which avoids the stress superposition effect while maintaining the overall structural stability.

[0049] Through the above solution, this application effectively suppresses local stress concentration in the area below the socket 12, reduces the risk of bending deformation of the bracket, thereby avoiding the application of horizontal extrusion force to the dry-type transformer and ensuring the safety performance of the internal structure of the equipment.

[0050] In some preferred embodiments, the number of hanging holes 11 in the hanging hole group is greater than the number of connecting components 3, and the connecting components 3 are installed in the hanging holes 11 of the hanging hole group to fix the first bracket 1 and the second bracket 2.

[0051] Specifically, the solution of this application uses a redundant design of the number of hanging holes 11 to enable the connecting component 3 to select the optimal position of the hanging hole 11 for installation according to the actual size of the dry-type transformer, thereby dynamically adjusting the distance between the first bracket 1 and the second bracket 2. During the hoisting process, since the bracket spacing is adjustable, the hoisting force can be evenly distributed to the transformer body, avoiding local stress concentration caused by a single fixing point, effectively buffering and dispersing the tension from the hook, and preventing the horizontal squeezing force from being directly transmitted to the transformer.

[0052] It should be noted that the hanging hole 11 above the socket 12, which is not used for installing the connecting component 3, can be used to connect the crane hook, and the hanging hole 11 below the socket 12, which is not used for installing the connecting component 3, can be used to install the hook 4.

[0053] In some preferred embodiments, the connecting component 3 includes a screw 31 and nuts 32. The two ends of the screw 31 are inserted into the hanging holes 11 of the first bracket 1 and the second bracket 2, and are clamped and fixed to the first bracket 1 and the second bracket 2 by a plurality of nuts 32.

[0054] Specifically, the screw 31 is inserted into the hanging holes 11 of the first bracket 1 and the second bracket 2. The preset position and size of the hanging holes 11 ensure that the brackets are strictly aligned in the horizontal and vertical directions, avoiding stress concentration caused by misalignment. The screw 31 is clamped and fixed on the outside of the first bracket 1 and the second bracket 2 by multiple nuts 32, and a uniform preload is applied to effectively prevent the screw 31 from axial displacement or rotation during vibration. The synergistic effect of the screw 31 and the nuts 32 significantly improves the overall rigidity of the connection point, so that the lifting device maintains structural stability under the complex load of crane lifting or forklift transfer, thereby reliably dispersing the horizontal compressive force and avoiding mechanical damage to the dry-type transformer.

[0055] Through the above solution, this application improves the fixing reliability of the connecting component 3, effectively prevents the connection from loosening or falling off during the hoisting process, reduces the risk of structural instability of the hoisting device, thereby reducing the possibility of the dry-type transformer being subjected to abnormal horizontal extrusion pressure during the transfer process, and avoiding deformation of the internal structure of the equipment and a decline in insulation performance.

[0056] In some preferred embodiments, there are at least four hooks, and they are S-shaped hooks.

[0057] Specifically, setting the number of hooks 4 to at least four ensures that the stress points can cover a wider area during hoisting, avoiding localized stress concentration caused by insufficient stress points. This can be achieved using four, five, or more hooks 4, with the aim of dispersing horizontal stress and reducing the probability of compressive stress. S-shaped hooks can be understood as hooks 4 with a specific curved structure, which can be achieved using an S-shaped design formed by bending metal materials. The purpose is to provide natural elastic cushioning, better conform to the top contour of the transformer, and disperse horizontal stress, preventing direct compression caused by rigid contact.

[0058] Specifically, the solution of this application precisely defines the number and shape characteristics of the hooks 4, ensuring that multiple hooks 4 are evenly distributed on the top of the transformer. The elastic characteristics of the S-shaped structure effectively absorb and disperse the horizontal compressive force generated during hoisting, thereby preventing mechanical damage to the transformer body. The increased number of hooks 4 ensures extensive coverage of the stress points, while the S-shaped design utilizes its curved shape to form a buffer area when hooking. The synergistic effect of these two factors optimizes the mechanical distribution path, effectively transforming and dispersing horizontal stress.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A combined lifting tool for a dry-type transformer, characterized in that, include: The first bracket, the second bracket, the connecting components, and the hooks are arranged symmetrically and fixedly connected by a number of the connecting components. Both the first bracket and the second bracket are provided with hanging hole groups in opposite positions. There are multiple hooks, the top of which are hooked into the hanging holes of the hanging hole groups, and the bottom of the hooks are used to hook and connect to the top of the dry-type transformer.

2. The combined lifting device for a dry-type transformer according to claim 1, characterized in that, Both the first bracket and the second bracket are vertically arranged metal plates.

3. The combined lifting device for a dry-type transformer according to claim 1, characterized in that, Both the first bracket and the second bracket have horizontally arranged insertion ports in the middle for cooperating with forklift forks.

4. The combined lifting device for a dry-type transformer according to claim 3, characterized in that, The socket is rectangular.

5. The combined lifting device for a dry-type transformer according to claim 3, characterized in that, The socket is positioned at the midpoint of either the first or second bracket.

6. The combined lifting device for a dry-type transformer according to claim 3, characterized in that, The connection components are at least four, with at least two connection components disposed above the socket and at least two connection components disposed below the socket.

7. The combined lifting device for a dry-type transformer according to claim 6, characterized in that, The minimum distance between adjacent connecting components located above the socket is greater than the minimum distance between adjacent connecting components located below the socket.

8. The combined lifting device for a dry-type transformer according to claim 1, characterized in that, The number of hanging holes in the hanging hole group is greater than the number of connecting components. The connecting components are installed in the hanging holes of the hanging hole group to fix the first bracket and the second bracket together.

9. The combined lifting device for a dry-type transformer according to claim 8, characterized in that, The connecting assembly includes a screw and nuts. The two ends of the screw are inserted into the hanging holes of the first bracket and the second bracket, and are clamped and fixed to the first bracket and the second bracket by a plurality of nuts.

10. The combined lifting device for a dry-type transformer according to claim 1, characterized in that, The hooks are at least four in number and are S-shaped hooks.

Images