A combined dry-type transformer

Abstract

The utility model relates to transformer technical field especially relates to a combined dry -type transformer, including support, the iron core fixed on the support, the low voltage coil and high voltage coil are successively installed outside the iron core, and the support is fixed with the cushion block, the inboard of cushion block bottom forms fixed protrusion to the coil extension, and the fixed protrusion is pressed against the top and the outer wall of low voltage coil, along the radial direction, the outside of cushion block bottom is slidably connected with adjustable protrusion, and the adjustable protrusion is pressed against the top and the inner wall of high voltage coil, still include the adjusting mechanism for adjusting adjustable protrusion position, its simple structure can adjust the radial thickness of protrusion to adapt to the slight error produced in the coil manufacturing process, effectively solve the problem in the background art.

Description

Technical Field

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

[0002] Dry-type transformers are widely used in urban construction, rail transit, high-rise buildings, and industrial and mining enterprises due to their advantages such as being oil-free, flame-retardant, explosion-proof, and easy to maintain. Their typical structure, from the inside out, consists of an iron core, a low-voltage coil, and a high-voltage coil. Insulating pads are placed between the high-voltage and low-voltage coils to form necessary heat dissipation channels and ensure the electrical insulation distance between the coils.

[0003] To enhance the fixing effect of the pad and prevent the coil from shifting under electromagnetic force, a protruding structure extending towards the coil is usually designed at the bottom or top of the pad. This protrusion can fit tightly against the outer wall of the low-voltage coil and the inner wall of the high-voltage coil, respectively, thereby effectively positioning and clamping the coil. In the prior art, the radial thickness of the protrusion is fixed and cannot be adjusted, which brings some inconveniences: during the manufacturing process, there may be slight errors in the coil winding dimensions, and the fixed thickness of the protrusion may result in poor adhesion to the coil surface, forming a support gap.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] This invention provides a combined dry-type transformer with a simple structure. The radial thickness of the protrusion can be adjusted to accommodate minor errors generated during coil manufacturing, effectively solving the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A combined dry-type transformer includes a support frame, an iron core fixed on the support frame, a low-voltage coil and a high-voltage coil sequentially mounted on the outside of the iron core, and a pad fixed on the support frame; the inner side of the bottom of the pad extends toward the coil to form a fixing protrusion, and the fixing protrusion abuts against the top and outer wall of the low-voltage coil. Along the radial direction, an adjustable protrusion is slidably connected to the outer side of the bottom of the pad, and the adjustable protrusion abuts against the top and inner wall of the high-voltage coil; It also includes an adjustment mechanism for adjusting the position of the adjustable protrusion.

[0007] Furthermore, the regulatory body includes: A groove is radially formed inside the pad, and an adjustable protrusion is slidably connected to the groove; a threaded rod is rotatably connected inside the groove, and the threaded rod is threadedly connected to the adjustable protrusion.

[0008] Furthermore, the regulatory mechanism also includes: The end cap is fixed to the outer end of the slide groove, and the threaded rod is rotatably connected to the end cap.

[0009] Furthermore, a recessed groove is provided at the outer end of the chute, and the end cap is embedded in the recessed groove.

[0010] Furthermore, the regulatory mechanism also includes: Threaded rod two, one end of which is fixedly connected to the end of threaded rod one outside the groove; A fixing plate is fixed to the pad block, and a through hole is provided on it for the threaded rod to pass through; The threaded rod has a nut connected to the two threads.

[0011] Furthermore, there are nuts on both sides of the fixing plate.

[0012] Furthermore, an operating part is provided at the other end of the threaded rod.

[0013] Furthermore, the pad includes an upper pad and a lower pad connected together. The upper pad is connected to the bracket, and both the fixed protrusion and the adjustable protrusion are provided on the lower pad.

[0014] The technical solution of this utility model can achieve the following technical effects: This device effectively compensates for the manufacturing error of the coil by means of an adjustable protrusion that can slide radially and an adjustment mechanism, ensuring that the protrusion is always in close contact with the high-voltage coil and the low-voltage coil, eliminating support gaps, and significantly improving the mechanical stability of the transformer. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a combined dry-type transformer. Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 A schematic diagram of the structure of the pad, the fixed protrusion, the adjustable protrusion, and the adjustment mechanism; Figure 4 for Figure 3 Exploded view; Reference numerals in the attached diagram: 1. Bracket; 2. Iron core; 3. Low-voltage coil; 4. High-voltage coil; 5. Fixed protrusion; 6. Adjustable protrusion; 7. Slide groove; 8. Threaded rod one; 9. End cap; 10. Threaded rod two; 11. Fixing plate; 12. Nut; 13. Upper pad; 14. Lower pad. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] This application provides a combined dry-type transformer, referring to... Figures 1-4 The device includes a bracket 1, an iron core 2 fixed on the bracket 1, a low-voltage coil 3 and a high-voltage coil 4 sequentially mounted on the outside of the iron core 2, a pad fixed on the bracket 1, more specifically, the top of the pad is fixed to the bracket 1 by bolts; the inner side of the bottom of the pad extends toward the coil to form a fixing protrusion 5, the fixing protrusion 5 abuts against the top and outer wall of the low-voltage coil 3; Along the radial direction, an adjustable protrusion 6 is slidably connected to the outer side of the bottom of the pad, and the adjustable protrusion 6 abuts against the top and inner wall of the high voltage coil 4; more specifically, the adjustable protrusion 6 and the fixed protrusion 5 together form the protrusion in the prior art. Since the adjustable protrusion 6 can slide along the radial direction, the overall span of the adjustable protrusion 6 and the fixed protrusion 5 can be adjusted. It also includes an adjustment mechanism for adjusting the position of the adjustable protrusion 6; when the coil has an error that is insufficient to install the existing pads and protrusions, the adjustment mechanism controls the overall span between the adjustable protrusion 6 and the fixed protrusion 5 to adapt to the size of the coil. The specific operation process of this application is as follows: When encountering coil size tolerance during assembly, the adjustable protrusion 6 is driven to slide radially along the bottom of the pad by operating the adjustment mechanism, thereby adjusting the overall span between it and the inner fixed protrusion 5, so that it accurately matches the actual size of the high voltage coil 4 and the low voltage coil 3, and finally tightly abuts against the high voltage coil 4 and the low voltage coil 3, thereby improving the support stability.

[0020] In this embodiment, the upper pads all use this device, while the lower pads use existing pads. This device and existing pads can be used in combination.

[0021] As a preferred embodiment of the above, refer to Figures 2-4 The regulating mechanism includes: The slide groove 7 is radially formed inside the pad, and the adjustable protrusion 6 is slidably connected to the slide groove 7; a threaded rod 8 is rotatably connected inside the slide groove 7, and the threaded rod 8 is threadedly connected to the adjustable protrusion 6; more specifically, the cross section of the slide groove 7 is cross-shaped, and the adjustable protrusion 6 is also cross-shaped, which can prevent the adjustable protrusion 6 from rotating, and the top of the adjustable protrusion 6 contacts the inner top wall of the slide groove 7, which improves the stability of the adjustable protrusion 6 during installation and prevents the threaded rod 8 from bending due to gaps between the two. The specific operation process of the adjustment mechanism of this device is as follows: During operation, by rotating the threaded rod 8, the threaded engagement between the rod and the adjustable protrusion 6 drives the adjustable protrusion 6 to move radially within the groove 7 of the pad, thereby adjusting the overall span between the adjustable protrusion 6 and the fixed protrusion 5, so as to achieve tight contact and stable support for coils of different sizes.

[0022] As a preferred embodiment of the above, refer to Figures 2-4 The regulating mechanism also includes: End cap 9, which is fixed to the outer end of slide groove 7, and threaded rod 8 is rotatably connected to end cap 9; In the above embodiment, by adding an end cap 9, a rotational support is provided on the other side of the threaded rod 8, thereby improving the stability of the threaded rod 8 during rotation.

[0023] As a preferred embodiment of the above, refer to Figure 4 The outer end of the slide 7 is provided with a recessed groove, and the end cap 9 is embedded in the recessed groove; In the above embodiment, embedding the end cap 9 into the recess and fixing the end cap 9 to the pad with bolts can more effectively limit the displacement of the end cap 9 and improve the convenience of assembling the end cap 9.

[0024] As a preferred embodiment of the above, refer to Figures 2-4 The regulating mechanism also includes: Threaded rod 2 10, one end of which is fixedly connected to the end of threaded rod 1 8 outside the slide groove 7; The fixing plate 11 is fixed on the pad block, and a through hole is provided on it for the threaded rod 10 to pass through; The threaded rod 10 is threaded and connected to a nut 12. In the above embodiment, when adjusting the position of the adjustable protrusion 6, the threaded rod 10 is rotated, and the threaded rod 10 drives the threaded rod 8 fixedly connected to it to rotate synchronously, thereby driving the adjustable protrusion 6 to move radially in the slide groove 7 through the thread. After adjustment, tighten nut 12 to make it contact the fixed plate 11, which can reduce the probability of the threaded rod 10 rotating, thereby preventing the threaded rod 8 from rotating and preventing the adjustable protrusion 6 from changing position during the use of dry-type transformer.

[0025] As a preferred embodiment of the above, refer to Figure 2 Nuts 12 are located on both sides of the fixing plate 11. More specifically, the threaded rod 10 has a smooth shaft portion at one end near the threaded rod 8. The purpose of this is to rotate the threaded rod 10 so that the inner nut 12 is screwed to the smooth shaft portion. Since the smooth shaft portion has no threads, the inner nut 12 will not rotate with the threaded rod 10, so as not to affect the position adjustment of the adjustable protrusion 6. At the same time, when adjusting the position of the adjustable protrusion 6, the outer nut 12 must also be manually rotated to disengage it from the fixing plate 11. In the above embodiment, after the position of the adjustable protrusion 6 is adjusted, the two nuts 12 are tightened towards each other on both sides of the fixing plate 11. The preload generated between them can be converted into a continuous frictional force between the threaded pairs, thereby effectively resisting the influence of vibration during transformer operation, preventing the rotation of the threaded rod 10, and providing a long-term lock for the position of the adjustable protrusion 6.

[0026] As a preferred embodiment of the above embodiment, the other end of the threaded rod 10 is provided with an operating part; In the above embodiment, the operating part is a polygonal groove opened at the other end of the threaded rod 10, or it can be a handwheel, etc. The threaded rod 10 can be rotated through the operating part, which improves the convenience of operation.

[0027] As a preferred embodiment of the above, refer to Figures 2-4 The pad includes an upper pad 13 and a lower pad 14 connected together. The upper pad 13 is connected to the bracket 1. The fixed protrusion 5 and the adjustable protrusion 6 are both provided on the lower pad 14. In the above embodiments, the upper pad 13 and the lower pad 14 are connected by flanges, bolts and nuts 12. The upper pad 13 of various specifications can be mass-produced to meet the installation requirements of different transformer models, while the lower pad 14 can be used as a standard universal component, which enhances the adaptability and flexibility of this device.

[0028] 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 illustrative of the principles of this 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 combined dry-type transformer, comprising a support (1), an iron core (2) fixed on the support (1), a low-voltage coil (3) and a high-voltage coil (4) sequentially mounted on the outside of the iron core (2), and a pad fixed on the support (1); characterized in that, The inner side of the bottom of the pad extends toward the coil to form a fixed protrusion (5), which abuts against the top and outer wall of the low-voltage coil (3). Along the radial direction, an adjustable protrusion (6) is slidably connected to the outer side of the bottom of the pad, and the adjustable protrusion (6) abuts against the top and inner wall of the high voltage coil (4); It also includes an adjustment mechanism for adjusting the position of the adjustable protrusion (6).

2. The combined dry-type transformer according to claim 1, characterized in that, The adjustment mechanism includes: A groove (7) is radially opened inside the pad block, and the adjustable protrusion (6) is slidably connected to the groove (7); a threaded rod (8) is rotatably connected inside the groove (7), and the threaded rod (8) is threadedly connected to the adjustable protrusion (6).

3. The combined dry-type transformer according to claim 2, characterized in that, The adjustment mechanism further includes: End cap (9), which is fixed to the outer end of the slide groove (7), and the threaded rod (8) is rotatably connected to the end cap (9).

4. The combined dry-type transformer according to claim 3, characterized in that, The outer end of the slide (7) is provided with a sink groove, and the end cap (9) is embedded in the sink groove.

5. The combined dry-type transformer according to claim 3, characterized in that, The adjustment mechanism further includes: Threaded rod two (10), one end of which is fixedly connected to the end of threaded rod one (8) outside the groove (7); A fixing plate (11) is fixed to the pad block, and a through hole is provided on it for the threaded rod (10) to pass through; The threaded rod (10) is threadedly connected to a nut (12).

6. The combined dry-type transformer according to claim 5, characterized in that, Nuts (12) are present on both sides of the fixing plate (11).

7. The combined dry-type transformer according to claim 5, characterized in that, An operating part is provided at the other end of the threaded rod (10).

8. The combined dry-type transformer according to claim 1, characterized in that, The pad includes an upper pad (13) and a lower pad (14) connected together. The upper pad (13) is connected to the bracket (1). The fixed protrusion (5) and the adjustable protrusion (6) are both provided on the lower pad (14).

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