A dry-type transformer with detachable coils

Abstract

The utility model relates to transformer technical field discloses a detachable coil's dry -type transformer, including transformer body, two groups of upper clamping seat and two groups of lower clamping seat, the transformer body includes the core and the coil of setting on the core, two groups the lower clamping seat with the coil between being provided with the leveling support block, the surface of leveling support block is provided with the adjusting mechanism symmetrically. This detachable coil's dry -type transformer, this detachable coil's dry -type transformer, through the setting of leveling support block and adjusting mechanism, when installing the coil, the operator first places the coil on four groups of cushion blocks, detects the horizontal deviation of coil using the level, then follows the diagonal line order, by loosening the non -adjusting side locking nut to shift the load first, then slowly tightens the adjusting bolt of the side to be adjusted, drives the cushion block to lift the coil steadily, so the circulation alternation adjustment, finally makes the coil weight even distribution in four support points, reaches accurate horizontal centering.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a dry-type transformer with a detachable coil. Background Technology

[0002] Transformers are crucial equipment in power generation, supply, and consumption enterprises, ensuring the reliable operation of the power grid and the supply of electricity for daily life. The structure and materials of a transformer directly affect the quality and safety of power supply. Dry-type transformers refer to transformers whose core and windings are not immersed in insulating oil. Their structure is divided into solid-insulated enclosed windings and unenclosed windings. The winding with the higher voltage is the high-voltage winding, and the winding with the lower voltage is the low-voltage winding.

[0003] With the increasing demands of urban power grids and advancements in transformer technology, dry-type transformers have become widely used in my country. In just a few decades, dry-type transformer technology has developed rapidly. However, current challenges remain regarding coil installation and alignment. Installing the heavy coils not only makes precise horizontal leveling and alignment difficult, but also easily leads to long-term operational hazards due to uneven support stress. Furthermore, the lack of effective buffering and guidance during the insertion of the coil into the core column makes it highly susceptible to direct scraping against the hard core, resulting in damage to the coil insulation layer. This directly affects the insulation reliability of the equipment and increases installation safety risks. Utility Model Content

[0004] (a) Technical problems to be solved The purpose of this utility model is to provide a dry-type transformer with a detachable coil, which solves the problems mentioned in the background art. When installing the heavy coil, it is not only difficult to achieve precise horizontal leveling and alignment, but also easy to leave long-term operational hazards due to uneven support force. Moreover, the inner wall of the coil lacks effective buffer and guidance during the process of fitting into the iron core column, which makes it very easy to directly scrape against the hard iron core, resulting in damage to the coil insulation layer, directly affecting the insulation reliability of the equipment and increasing the installation safety risk.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a dry-type transformer with a detachable coil, comprising a transformer body, two sets of upper clamps and two sets of lower clamps. The transformer body includes an iron core and a coil sleeved on the iron core. A leveling support block is provided between the two sets of lower clamps and the coil. An adjustment mechanism is symmetrically arranged on the surface of the leveling support block. An expansion mechanism for guiding the coil to be sleeved on the iron core is symmetrically arranged on the bottom sides of the iron core. The adjustment mechanism includes four sets of pads symmetrically arranged on the surface of the leveling support block. An adjustment bolt is provided at the bottom center of the pad. A washer and a locking nut are provided on the upper and lower surfaces of the adjustment bolt on both sides of the lower clamp. The expansion mechanism includes elastic expansion plates symmetrically arranged on the bottom sides of the iron core. A limit plate is fixedly connected to the outer top of each set of elastic expansion plates. A guide cone sleeve overlaps above each set of limit plates. The guide cone sleeve is used for guiding the coil installation.

[0006] As a further embodiment of this utility model, the pad is slidably connected above the leveling support block, and a circular groove is provided at the bottom center of the pad. The adjusting bolt is located below the circular groove. The circular groove serves to position and prevent slippage, ensuring that the end of the adjusting bolt is in stable contact with the pad.

[0007] As a further embodiment of this utility model, the plates of the iron core are arranged symmetrically, and the width of the plates decreases sequentially from the middle to both sides of the iron core. The iron core is made of stacked silicon steel sheets and includes an upper yoke, a lower yoke, and a vertical iron column. Multiple sets of connecting holes are opened through the surfaces of the upper yoke, the lower yoke, and the vertical iron column. The upper yoke and the upper clamp, as well as the lower yoke and the lower clamp, are connected by screws through the connecting holes. Tie rods are provided on both sides of the vertical iron column. The arrangement of the upper yoke, the lower yoke, and the vertical iron column serves to form a complete iron core body, create the main magnetic path, and provide support for the core structure.

[0008] As a further embodiment of this utility model, the upright iron column and the tie rod are connected by a connecting rod through a through-hole. The upper and lower ends of the tie rod are respectively connected to the upper clamp and the lower clamp by bolts. The tie rod serves to fasten and stabilize the iron core.

[0009] As a further embodiment of this utility model, four sets of upper wedges are symmetrically arranged above the coil. The upper wedges are connected to the upper clamping seat through a clamping screw. The clamping screw serves to axially clamp and fix the coil.

[0010] As a further embodiment of this utility model, the coil includes a high-voltage winding and a low-voltage winding. The low-voltage winding is located in the inner layer, and the high-voltage winding is located in the outer layer. The high-voltage winding and the low-voltage winding are cast into an integral structure using insulating material. The arrangement of the high-voltage winding and the low-voltage winding serves to construct stable electromagnetic coupling and improve the overall structural rigidity.

[0011] As a further embodiment of this utility model, the bottom of the two sets of lower clamps are symmetrically threaded with two sets of bases. The bases are used for threaded connection to the external ground. The bases serve to connect the equipment with the external installation environment.

[0012] (III) Beneficial Effects This utility model provides a dry-type transformer with a detachable coil, which has the following advantages: 1. This dry-type transformer with detachable coils, through the setting of leveling support blocks and adjustment mechanisms, allows operators to initially place the coil on four sets of pads during coil installation. A level is then used to check the coil's horizontal deviation. Following a diagonal sequence, the operator first loosens the locking nut on the non-adjusting side to transfer the load, then slowly tightens the adjusting bolt on the side to be adjusted, driving the pads to smoothly lift the coil. This alternating adjustment process ensures the coil's weight is evenly distributed across the four support points, achieving precise horizontal alignment. This alternating unloading principle enables labor-saving fine-tuning while ensuring precise alignment of the coil and core, providing reliable accuracy for subsequent assembly and effectively avoiding safety hazards caused by uneven support.

[0013] 2. This dry-type transformer with detachable coils, through the setting of the iron core and expansion mechanism, guides the correct installation of the coil by fitting a guide cone sleeve onto the top surface of the iron core column. At this time, the bottom of the guide cone sleeve is located above the limiting plate of the elastic expansion liner. The suspended coil is first roughly positioned and centered through the large flared opening of the guide cone sleeve at the top of the iron core, guiding the coil into the installation path. As the coil continues to descend, the guide cone sleeve will also descend partially, driving the lower limiting plate to push the elastic expansion liner outward. The inner wall of the coil will contact and compress the elastic expansion liner. This liner, as an elastic buffer medium, achieves a soft transition between the coil and the rigid iron core. Finally, the coil is smoothly positioned under the protection of the elastic expansion liner. After installation, the guide cone sleeve is removed and used for the installation guidance of the next coil. Thus, through the rough-to-fine guidance and the soft-over-hard buffer, the insulation layer is effectively prevented from being scratched, ensuring smooth installation and reliable equipment insulation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2This is a schematic diagram of the overall disassembled structure of this utility model; Figure 3 This is a schematic diagram of the adjustment mechanism of this utility model; Figure 4 This is a schematic diagram of the expansion mechanism of this utility model.

[0015] In the diagram: 1. Transformer body; 2. Upper clamp; 3. Lower clamp; 4. Iron core; 5. Coil; 6. Leveling support block; 7. Adjusting mechanism; 701. Pad; 702. Adjusting bolt; 703. Shim; 704. Locking nut; 8. Expansion mechanism; 801. Elastic expansion liner; 802. Limiting plate; 803. Guide cone sleeve; 9. Upper yoke; 10. Lower yoke; 11. Vertical iron column; 12. Tie rod; 13. Upper wedge; 14. Clamping screw; 15. High voltage winding; 16. Low voltage winding; 17. Base. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] Example 1 Please see Figures 1 to 4 This utility model provides a technical solution: a dry-type transformer with a detachable coil, including a transformer body 1, two sets of upper clamps 2 and two sets of lower clamps 3. The transformer body 1 includes an iron core 4 and a coil 5 sleeved on the iron core 4. A leveling support block 6 is provided between the two sets of lower clamps 3 and the coil 5. An adjustment mechanism 7 is symmetrically arranged on the surface of the leveling support block 6. An expansion mechanism 8 for guiding the coil 5 to be sleeved on the iron core 4 is symmetrically arranged on both sides of the bottom. The adjustment mechanism 7 includes components symmetrically arranged on the leveling support block. The surface of the 6 has four sets of pads 701. The bottom center of the pads 701 is provided with an adjusting bolt 702. The adjusting bolt 702 is located on the upper and lower surfaces of the lower clamp 3. The surface of the lower clamp 3 is provided with a washer 703 and a locking nut 704. The expansion mechanism 8 includes elastic expansion plates 801 symmetrically arranged on the bottom of both sides of the iron core 4. The top outer sides of the two sets of elastic expansion plates 801 are fixedly connected to limit plates 802. The upper part of the two sets of limit plates 802 is covered with a guide cone sleeve 803. The guide cone sleeve 803 is used for guiding the installation of the coil 5. Furthermore, the pad 701 is slidably connected above the leveling support block 6. A circular groove is provided at the bottom center of the pad 701, and the adjusting bolt 702 is located below the circular groove. The circular groove serves to position and prevent slippage, ensuring that the end of the adjusting bolt 702 is in stable contact with the pad 701. Furthermore, the plates of the iron core 4 are arranged symmetrically, and the width of the plates of the iron core 4 decreases from the middle to the sides. The iron core 4 is made of stacked silicon steel sheets. The iron core 4 includes an upper iron yoke 9, a lower iron yoke 10 and a vertical iron column 11. Multiple sets of connecting holes are opened through the surfaces of the upper iron yoke 9, the lower iron yoke 10 and the vertical iron column 11. The upper iron yoke 9 and the upper clamp 2 and the lower iron yoke 10 and the lower clamp 3 are connected by screws through the connecting holes. Tie rods 12 are provided on both sides of the vertical iron column 11. The arrangement of the upper iron yoke 9, the lower iron yoke 10 and the vertical iron column 11 plays a role in forming the main magnetic path of the complete iron core 4 and providing support for the core structure. Furthermore, the upright iron column 11 and the tie rod 12 are connected by a connecting rod through a through-hole. The upper and lower ends of the tie rod 12 are respectively connected to the upper clamp 2 and the lower clamp 3 by bolt threads. The tie rod 12 serves to fasten and stabilize the iron core 4. Furthermore, four sets of upper wedges 13 are symmetrically arranged above the coil 5. The upper wedges 13 are connected to the upper clamping seat 2 through the clamping screw 14. The clamping screw 14 serves to axially clamp and fix the coil 5. Furthermore, the coil 5 includes a high-voltage winding 15 and a low-voltage winding 16. The low-voltage winding 16 is located in the inner layer, and the high-voltage winding 15 is located in the outer layer. The high-voltage winding 15 and the low-voltage winding 16 are cast into an integral structure using insulating material. The arrangement of the high-voltage winding 15 and the low-voltage winding 16 plays a role in constructing stable electromagnetic coupling and improving the overall structural rigidity. Furthermore, the bottom of the two sets of lower clamps 3 are symmetrically threaded with two sets of bases 17. The bases 17 are used for threaded connection to the external ground. The bases 17 serve to connect the equipment to the external installation environment.

[0018] In this invention, the working steps of the device are as follows: First step: When installing coil 5, the operator first places coil 5 on the four sets of pads 701, uses a level to check the horizontal deviation of coil 5, and then follows the diagonal sequence. First, loosen the non-adjustment side locking nut 704 appropriately to transfer the load, and then slowly tighten the adjustment bolt 702 on the side to be adjusted. Drive the pad 701 to smoothly lift coil 5. Repeat this cycle to adjust, and finally make the weight of coil 5 evenly distributed on the four support points to achieve precise horizontal centering. The second step: When installing coil 5, in order to guide the correct installation of coil 5, the guide cone sleeve 803 is fitted onto the top surface of the iron core 4 column. At this time, the bottom of the guide cone sleeve 803 is located above the limiting plate 802 of the elastic expansion liner 801. The suspended coil 5 is first roughly positioned and centered through the large flared mouth of the guide cone sleeve 803 at the top of the iron core 4, guiding the coil 5 into the installation path. As the coil 5 continues to descend, the guide cone sleeve 803 will also descend partially, and drive the lower limiting plate 802 to push the elastic expansion liner 801 to expand outward. The inner wall of the coil 5 will contact and compress the elastic expansion liner 801. The elastic expansion liner 801 acts as an elastic buffer medium, realizing a soft transition between the coil 5 and the rigid iron core 4. Finally, the coil 5 is smoothly placed under the protection of the elastic expansion liner 801. After the installation is completed, the guide cone sleeve 803 is removed for the installation guide of the next coil 5.

[0019] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dry-type transformer with detachable coils, comprising a transformer body (1), two sets of upper clamps (2) and two sets of lower clamps (3), characterized in that: The transformer body (1) includes an iron core (4) and a coil (5) sleeved on the iron core (4). A leveling support block (6) is provided between the two sets of lower clamps (3) and the coil (5). An adjustment mechanism (7) is symmetrically provided on the surface of the leveling support block (6). An expansion mechanism (8) for guiding the coil (5) to be sleeved on the iron core (4) is symmetrically provided on the bottom of both sides of the iron core (4). The adjustment mechanism (7) includes four sets of pads (701) symmetrically arranged on the surface of the leveling support block (6). An adjustment bolt (702) is provided at the bottom center of the pad (701). The adjustment bolt (702) is provided with a washer (703) and a locking nut (704) on both the upper and lower sides of the lower clamp (3). The expansion mechanism (8) includes elastic expansion liner plates (801) symmetrically arranged at the bottom of both sides of the iron core (4). Limiting plates (802) are fixedly connected to the outer top of both sets of elastic expansion liner plates (801). Guide cone sleeves (803) overlap the top of both sets of limiting plates (802). The guide cone sleeves (803) are used for guiding the installation of the coil (5).

2. A dry-type transformer with a detachable coil according to claim 1, characterized in that: The pad (701) is slidably connected above the leveling support block (6). A circular groove is provided at the bottom center of the pad (701), and the adjusting bolt (702) is located below the circular groove.

3. A dry-type transformer with a detachable coil according to claim 1, characterized in that: The plates of the iron core (4) are arranged symmetrically. The width of the plates of the iron core (4) decreases from the middle to the sides. The iron core (4) is made of stacked silicon steel sheets. The iron core (4) includes an upper yoke (9), a lower yoke (10) and a vertical iron column (11). Multiple sets of connecting holes are opened through the surfaces of the upper yoke (9), the lower yoke (10) and the vertical iron column (11). The upper yoke (9) is connected to the upper clamp (2) and the lower yoke (10) is connected to the lower clamp (3) through the connecting holes. Pull rods (12) are provided on both sides of the vertical iron column (11).

4. A dry-type transformer with a detachable coil according to claim 3, characterized in that: The upright iron column (11) and the tie rod (12) are connected by a connecting rod through a through-hole. The upper and lower ends of the tie rod (12) are respectively connected to the upper clamp (2) and the lower clamp (3) by bolt threads.

5. A dry-type transformer with a detachable coil according to claim 1, characterized in that: Four sets of upper wedges (13) are symmetrically arranged above the coil (5), and the upper wedges (13) are connected to the upper clamp (2) through the clamping screw (14).

6. A dry-type transformer with a detachable coil according to claim 1, characterized in that: The coil (5) includes a high-voltage winding (15) and a low-voltage winding (16). The low-voltage winding (16) is located in the inner layer, and the high-voltage winding (15) is located in the outer layer. The high-voltage winding (15) and the low-voltage winding (16) are cast into an integral structure using insulating material.

7. A dry-type transformer with a detachable coil according to claim 1, characterized in that: The bottom of the two sets of lower clamps (3) are symmetrically threaded with two sets of bases (17), which are used for threaded connection to the external ground.

Images