A power distribution transformer winding support structure

Abstract

This utility model discloses a distribution transformer winding support structure, belonging to the technical field of distribution transformer winding support. The distribution transformer winding support structure includes an inner liner assembly and an outer support assembly. The inner liner assembly includes a base, with a supporting insulating cylinder on the top of the base. An inner liner plate one and an inner liner plate two are sleeved on the outer circumference of the supporting insulating cylinder. The winding is sleeved on the outer circumference of both inner liner plates one and two. Compared to traditional frame support methods, this structure, through a composite support design of inner wall expansion support and outer wall bidirectional clamping, provides reliable constraint on the winding in both the axial and radial directions, significantly improving the support effect and stability. Furthermore, compared to the existing method of tightly winding the outer wall of the frame, it eliminates the need for forced peeling or layer-by-layer disassembly, significantly reducing disassembly difficulty and shortening maintenance time. It also avoids damage to the winding insulation layer during disassembly, greatly improving the convenience and safety of transformer maintenance.

Description

Technical Field

[0001] This utility model relates to the field of distribution transformer winding support technology, and more specifically, to a distribution transformer winding support structure. Background Technology

[0002] The windings of a distribution transformer are the core conductive components of the transformer, typically made of conductive materials such as copper or aluminum. They transmit electrical energy and transform voltage through electromagnetic induction. Their structural form (e.g., cylindrical, disc-type) and winding process directly affect the transformer's performance. The distribution transformer winding support structure is a device used to fix and support the windings. It acts like the winding's "skeleton," using components such as support bars, clamps, and insulating partitions to ensure the windings maintain a stable position under electromagnetic forces, mechanical vibrations, and short-circuit impacts. It also provides insulation and heat dissipation. The rationality of its structural design plays a crucial role in the transformer's reliability, service life, and fault tolerance.

[0003] In practical applications, most existing distribution transformer windings are wound onto a frame, which is then fitted onto the transformer's internal core for support. However, this traditional support installation method has significant drawbacks: the outer wall of the winding often lacks effective support and restraint components. When the transformer is running, the winding vibrates due to electromagnetic forces. If the outer wall lacks restraint structures, radial displacement or deformation can easily occur. In the event of a short-circuit fault, the instantaneous strong electrodynamic force further exacerbates the risk of winding misalignment. Moreover, traditional frames are only axially fixed, making it difficult to provide circumferential restraint to the outer wall of the winding. This can lead to problems such as insulation wear and partial discharge in the winding due to insufficient support during long-term operation, severely affecting the transformer's operational stability and service life.

[0004] Furthermore, the existing structural design of distribution transformers, with the windings tightly wound around the outer wall of the frame, presents significant difficulties for subsequent disassembly and maintenance. When the windings are wound in a dense-turn manner, the gaps between the turns are extremely small, forming a tightly wrapped state between the frame and the windings. Insulating paint or binding tape are usually used for fixation during the winding process, further strengthening the integrity of the windings and the frame. Once maintenance is required, it is difficult for operators to find an effective point of force without damaging the winding insulation layer. If external force is used to forcibly disassemble, it is very easy to cause deformation of the winding wires and damage to the inter-turn insulation. For multi-layer windings, the inner windings are tightly wrapped by the outer layers, and disassembly requires peeling off each layer one by one. This not only consumes a lot of time, but also may cause tools to accidentally damage adjacent windings due to the narrow operating space. This winding method makes the traditional support structure have obvious shortcomings in terms of maintenance convenience. Especially in scenarios requiring emergency repairs, the high difficulty of disassembly directly affects the transformer's repair efficiency and maintenance costs.

[0005] In view of this, we propose a winding support structure for distribution transformers. Utility Model Content

[0006] 1. Technical problems to be solved

[0007] The purpose of this utility model is to provide a support structure for the winding of a distribution transformer to solve the problems mentioned in the background art.

[0008] 2. Technical Solution

[0009] A distribution transformer winding support structure includes an inner liner assembly and an outer support assembly. The inner liner assembly includes a base, and a supporting insulating cylinder is provided on the top of the base. A threaded hole is opened on the outer circumferential wall of the top of the supporting insulating cylinder. A threaded sleeve ring is also threadedly connected to the outer circumferential wall of the top of the supporting insulating cylinder. An inner liner plate one and an inner liner plate two are sleeved on the outer circumferential wall of the supporting insulating cylinder. The winding is sleeved on the outer circumferential walls of the inner liner plate one and the inner liner plate two. The outer support assembly includes a fixing plate, and a connecting shell and a mounting block are provided on the top of the fixing plate.

[0010] Preferably, the outer walls at both ends of the inner lining plate are fixedly connected to a connecting seat, and the inner walls of the plurality of connecting seats are rotatably connected to a rotating rod.

[0011] Preferably, the outer walls of both ends of the inner lining plate are fixedly connected to connecting seats two, the inner walls of multiple connecting seats two are rotatably connected to rotating rods two, the tops of multiple rotating rods two are fixedly connected to pressing rods, and multiple rotating rods one are rotatably connected to multiple corresponding rotating rods two respectively.

[0012] Preferably, a bidirectional lead screw is rotatably connected to the inner wall of the connecting shell, and a connecting handle is connected to the outer circumference of the end of the bidirectional lead screw, with a fixing bolt threaded into the inner thread of the connecting handle.

[0013] Preferably, a movable plate is threaded onto the outer circumference of the bidirectional lead screw, and a connecting rod is fixedly connected to the bottom of the plurality of movable plates, with a support frame fixedly connected to the bottom of the connecting rod.

[0014] Preferably, a limit bolt is threaded inside the mounting block, and the limit bolt matches the threaded hole.

[0015] Preferably, both the base and the fixing plate have through openings at their tops, and the supporting insulating cylinder has a sleeve interface inside.

[0016] 3. Beneficial effects

[0017] Compared to existing technologies, the advantages of this utility model are as follows: In actual use, the winding can be first sleeved on the outer wall of the supporting insulating cylinder, and then the threaded sleeve ring can be locked. During the locking process of the threaded sleeve ring, its lower end face will press the pressing connecting rod downward. When the pressing connecting rod moves downward, it pushes the inner liner plate one and inner liner plate two to expand to both sides through the structure composed of rotating rod one and rotating rod two, thereby forming a uniform supporting clamping force on the inner wall of the winding. Then, the fixing plate is installed on the top of the supporting insulating cylinder, and the limiting bolt is rotated to make it threadedly connected to the outer wall of the supporting insulating cylinder. The outer support assembly is fixed in the threaded hole on the outer wall. After fixing, rotating the bidirectional screw will cause the two support frames to move synchronously towards the winding direction, thereby clamping and supporting the outer wall of the winding, which significantly improves the overall support effect of the winding. After clamping, the locking bolt limits the bidirectional screw, effectively preventing it from loosening and turning due to vibration. Compared with the traditional skeleton support method, this structure, through the composite support design of inner wall expansion support and outer wall bidirectional clamping, enables the winding to obtain reliable constraint in both axial and radial directions, and the support effect and stability are greatly improved.

[0018] When disassembling the winding, the double-acting screw can be reversed first to move the two support frames away from the outer wall of the winding, releasing the clamping constraint on the outer wall. Then, the limit bolt can be rotated in the opposite direction to release the fixation on the top of the support insulation cylinder. Next, the threaded sleeve ring can be loosened to lift it upward. After losing its pressure, the inner liner plate 1 and inner liner plate 2 can be relaxed due to the loss of pressure. The support structure that was originally tightly attached to the inner wall of the winding can generate a certain amount of movement gap. At this time, the winding can be easily pulled off the support insulation cylinder because the support force of the inner and outer walls is released. This disassembly method avoids the tight coupling state between the winding and the frame in the traditional skeleton winding structure. With the use of the releasable inner liner plate and the separable outer wall support frame, disassembly is more convenient. Compared with the existing method of tightly winding the outer wall of the skeleton, there is no need to forcibly peel off or disassemble layer by layer, which significantly reduces the difficulty of disassembly, shortens the maintenance time, and avoids damage to the winding insulation layer during disassembly, greatly improving the convenience and safety of transformer maintenance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the inner lining support component structure of this utility model;

[0021] Figure 3 This is a schematic diagram of structure A of the present invention;

[0022] Figure 4 This is a schematic diagram of the external support component structure of this utility model;

[0023] Figure 5 This is a schematic diagram of structure B of the present invention;

[0024] The following are the labels in the diagram: 100, base; 110, supporting insulating cylinder; 111, threaded hole; 112, threaded collar; 120, inner liner plate one; 121, connecting seat one; 122, rotating rod one; 130, inner liner plate two; 131, connecting seat two; 132, rotating rod two; 133, pressing connecting rod; 140, winding; 200, fixing plate; 210, connecting shell; 211, double-acting screw; 212, connecting handle; 213, fixing bolt; 214, moving plate; 215, connecting rod; 216, support frame; 220, mounting block; 221, limit bolt. Detailed Implementation

[0025] 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", "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, and are not intended to indicate or imply that the device or component 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.

[0026] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Please see Figure 1-5 This utility model provides a technical solution:

[0029] A distribution transformer winding support structure includes an inner liner assembly and an outer support assembly. The inner liner assembly includes a base 100, and a supporting insulating cylinder 110 is provided on the top of the base 100. A threaded hole 111 is opened on the outer circumference of the top of the supporting insulating cylinder 110. A threaded sleeve ring 112 is also threadedly connected to the outer circumference of the top of the supporting insulating cylinder 110. An inner liner plate 120 and an inner liner plate 130 are sleeved on the outer circumference of the supporting insulating cylinder 110. A winding 140 is sleeved on the outer circumference of the inner liner plate 120 and the inner liner plate 130. The outer support assembly includes a fixing plate 200, and a connecting shell 210 and a mounting block 220 are provided on the top of the fixing plate 200.

[0030] In some embodiments: the inner liner plate 120, the inner liner plate 130, and the support frame 216 are made of aluminum alloy, which is lightweight. The supporting insulating cylinder 110 can be made of materials such as PET, PBT, and PA+GF, which are existing technologies. The aluminum alloy (such as 6061-T6) used for the inner liner plate 120, the inner liner plate 130, and the support frame 216 requires anodizing + insulating coating composite treatment to achieve a balance between insulation and support: first, hard anodizing is performed to form a porous oxide film (Al□O3, high dielectric strength), and then a polytetrafluoroethylene (PTFE) insulating layer is sprayed to make the overall surface resistivity meet the insulation requirements of the transformer. This material has high tensile strength, which can reduce the weight of the support components while ensuring rigidity. Attention should be paid to the electrochemical compatibility between the aluminum alloy and the winding copper conductor. A thin Nomex insulating paper can be laid on the contact surface to avoid galvanic corrosion caused by moisture in the transformer oil. The rotating rod 122 and the rotating rod 132 also use aluminum alloy with anodizing + insulating coating composite treatment to achieve a balance between insulation and support.

[0031] Specifically, the outer walls of both ends of the inner lining plate 120 are fixedly connected to connecting seats 121, and the inner walls of multiple connecting seats 121 are rotatably connected to rotating rods 122.

[0032] Furthermore, connecting seats 131 are fixedly connected to the outer walls of both ends of the inner lining plate 130. Rotating rods 132 are rotatably connected to the inner walls of multiple connecting seats 131. Pressing rods 133 are fixedly connected to the top of multiple rotating rods 132. Multiple rotating rods 122 are rotatably connected to multiple corresponding rotating rods 132, so that when the pressing rods 133 press down, the lining plate 120 and the inner lining plate 130 can be moved and expanded by rotating rods 122 and 132.

[0033] Furthermore, a bidirectional lead screw 211 is rotatably connected to the inner wall of the connecting shell 210, and a connecting handle 212 is connected to the outer circumference of the end of the bidirectional lead screw 211. A fixing bolt 213 is threaded inside the connecting handle 212 to facilitate limiting the bidirectional lead screw 211 and reduce its misrotation.

[0034] Furthermore, the outer circumference of the bidirectional lead screw 211 is threaded with a movable plate 214, and the bottom of the multiple movable plates 214 is fixedly connected to a connecting rod 215, and the bottom of the connecting rod 215 is fixedly connected to a support frame 216.

[0035] It is worth noting that the mounting block 220 has a threaded connection to a limit bolt 221, which matches the threaded hole 111, making it easy to install the fixing plate 200.

[0036] It is worth noting that both the base 100 and the fixing plate 200 have through openings at the top, and the supporting insulating cylinder 110 has a sleeve interface inside, which makes it easy to wrap it around the iron core of the transformer.

[0037] Working principle: In actual use, the winding 140 is first sleeved on the outer circumference of the supporting insulating cylinder 110, and then the threaded sleeve ring 112 is locked. During the locking process of the threaded sleeve ring 112, its lower end face will press down on the pressing connecting rod 133. When the pressing connecting rod 133 moves down, it pushes the inner liner plate 120 and the inner liner plate 130 to expand to both sides through the structure composed of rotating rod one 122 and rotating rod two 132, thereby forming a uniform supporting clamping force on the inner wall of the winding 140. Then, the fixing plate 200 is installed on the top of the supporting insulating cylinder 110 and limited by rotation. Bolt 221 is threaded into the threaded hole 111 on the outer circumference of the supporting insulating cylinder 110 to fix the external support assembly. After fixing, rotating the bidirectional lead screw 211 will cause its reverse thread to drive the two support frames 216 to move synchronously towards the winding 140, thereby clamping and supporting the outer wall of the winding 140, significantly improving the overall support effect of the winding 140. After clamping, locking bolt 213 limits the bidirectional lead screw 211 to effectively prevent it from loosening and turning due to vibration. Compared with the traditional frame support method, this structure uses a composite support design of inner wall expansion support and outer wall bidirectional clamping. This ensures reliable constraint on the winding 140 in both the axial and radial directions, significantly improving support and stability. When disassembling the winding 140, the bidirectional lead screw 211 can be reversed first, causing the two support frames 216 to move away from the outer wall of the winding 140, releasing the clamping constraint on the outer wall. Then, the limit bolt 221 can be rotated in the opposite direction to release the fixation on the top of the supporting insulating cylinder 110. Next, the threaded sleeve ring 112 can be loosened and lifted upwards. After losing its pressure, the inner liner plate 120 and inner liner plate 130 can be relaxed due to the loss of pressure, and the original tight fit against the inner wall of the winding 140 can be released. The support structure can create a certain amount of clearance. At this time, the winding 140 can be easily removed from the support insulation cylinder 110 due to the release of the inner and outer wall support forces. This disassembly method avoids the tight coupling state between the winding 140 and the skeleton in the traditional skeleton winding structure. With the use of a releasable inner liner and a support frame 216 with a separable outer wall, disassembly is more convenient. Compared with the existing method of tightly winding the outer wall of the skeleton, there is no need to forcibly peel off or disassemble layer by layer, which significantly reduces the difficulty of disassembly, shortens the maintenance time, and avoids damage to the insulation layer of the winding 140 during disassembly, greatly improving the convenience and safety of transformer maintenance.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A distribution transformer winding support structure, comprising an inner liner assembly and an outer support assembly, characterized in that: The inner lining assembly includes a base (100), a supporting insulating cylinder (110) is provided on the top of the base (100), a threaded hole (111) is provided on the outer circumference of the top of the supporting insulating cylinder (110), a threaded sleeve ring (112) is also threadedly connected to the outer circumference of the top of the supporting insulating cylinder (110), an inner lining plate one (120) and an inner lining plate two (130) are sleeved on the outer circumference of the supporting insulating cylinder (110), and a winding (140) is sleeved on the outer circumference of the inner lining plate one (120) and the inner lining plate two (130). The outer support assembly includes a fixing plate (200), a connecting shell (210) and a mounting block (220) are provided on the top of the fixing plate (200).

2. The distribution transformer winding support structure according to claim 1, characterized in that: The outer walls of both ends of the inner lining plate (120) are fixedly connected to the connecting seat (121), and the inner walls of the multiple connecting seats (121) are rotatably connected to the rotating rod (122).

3. The distribution transformer winding support structure according to claim 2, characterized in that: The inner lining plate 2 (130) is fixedly connected to the outer walls of both ends by connecting seat 2 (131), and the inner walls of multiple connecting seat 2 (131) are rotatably connected to rotating rod 2 (132). The top of multiple rotating rod 2 (132) is fixedly connected to a pressing connecting rod (133), and multiple rotating rod 1 (122) are rotatably connected to multiple corresponding rotating rod 2 (132).

4. The distribution transformer winding support structure according to claim 3, characterized in that: The inner wall of the connecting shell (210) is rotatably connected to a bidirectional lead screw (211), and the outer circumferential wall of the end of the bidirectional lead screw (211) is connected to a connecting handle (212), and a fixing bolt (213) is threaded inside the connecting handle (212).

5. The distribution transformer winding support structure according to claim 4, characterized in that: The bidirectional lead screw (211) has a movable plate (214) threaded onto its outer circumference. A connecting rod (215) is fixedly connected to the bottom of each of the movable plates (214). A support frame (216) is fixedly connected to the bottom of each connecting rod (215).

6. The distribution transformer winding support structure according to claim 1, characterized in that: The mounting block (220) has a threaded fitting of a limit bolt (221) inside, and the limit bolt (221) matches the threaded hole (111).

7. The distribution transformer winding support structure according to claim 1, characterized in that: Both the base (100) and the fixing plate (200) have through openings at their tops, and the supporting insulating cylinder (110) has a sleeve interface inside.

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