Single-phase pole-mounted transformer
By adopting a single-frame concentric winding structure and a cylindrical sealing oil tank, the heat dissipation and insulation problems caused by the large winding size of the transformer on a single-phase column are solved, and the transformer is miniaturized and multi-voltage output is achieved.
Patent Information
- Application Number
- CN202422235592.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The existing single-phase column-on-transformers have large winding sizes, which leads to an increase in the overall size of the transformer, which is not conducive to heat dissipation and insulation.
A single-frame concentric winding structure is adopted, including a single-frame coiled iron core and a concentric winding. The low-voltage coil and high-voltage coil are wound on both sides of the iron core, and are connected in series between the high-voltage coils and between the low-voltage coils. The sealing oil tank adopts a cylindrical structure, and the column rod fixing assembly is set opposite the low-voltage porcelain sleeve.
The overall size of the winding and transformer is reduced, which facilitates heat dissipation and insulation, reduces noise, improves installation stability and aesthetics, and realizes a variety of voltage outputs.
Smart Images
Figure CN223065954U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of distribution transformers, and particularly refers to a single-phase pole-mounted transformer. Background Art
[0002] A single-phase pole-mounted transformer is an outdoor distribution transformer installed on a pole, and both its primary winding and secondary winding are single-phase windings. In the prior art, the coil windings are usually wound around two single-frame core laminations simultaneously. This will result in a larger size of the winding, thereby increasing the overall size of the transformer, and it is also not conducive to the heat dissipation and insulation of the transformer. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a single-phase pole-mounted transformer, which adopts a single-frame concentric winding structure with a short magnetic circuit, is beneficial to reducing the size of the winding and the overall size of the transformer, and is convenient for heat dissipation and insulation at the same time.
[0004] To achieve the above purpose, the utility model provides a single-phase pole-mounted transformer, including a single-frame concentric winding structure, which is arranged in a sealed oil tank. A high-voltage porcelain bushing is arranged at the outer top of the sealed oil tank, a low-voltage porcelain bushing is arranged at the upper part of the outer side of the sealed oil tank, and a pole fixing component is also arranged on the outer side of the sealed oil tank, and the pole fixing component is arranged opposite to the low-voltage porcelain bushing.
[0005] Compared with the prior art, the beneficial effect of the utility model lies in that the overall size of the single-frame concentric winding structure is smaller, so that the size of the matching sealed oil tank is reduced, and thus the overall size of the entire transformer is effectively reduced, which is convenient for heat dissipation and insulation. The high-voltage porcelain bushing is connected to the input voltage, and the low-voltage ceramic tube is connected to the user end. The connection of the high-voltage input end and the low-voltage output end is more convenient and simple. The pole fixing component is arranged opposite to the low-voltage porcelain bushing, so that there is no interference between the transformer and the pole during installation and fixation.
[0006] As a further improvement of the utility model, the single-frame concentric winding structure includes a single-frame core lamination. A group of low-voltage coils are respectively wound on both sides of the single-frame core lamination, and the low-voltage coils are connected in series. A high-voltage coil is wound around the outer periphery of the low-voltage coils, and the high-voltage coils are connected in series.
[0007] In this way, using a single-frame core lamination, high- and low-voltage windings are concentrically sleeved on the core columns on both sides respectively, which is beneficial to reducing the size of the winding and the overall size of the transformer, and is convenient for heat dissipation and insulation at the same time.
[0008] As a further improvement of the utility model, the number of turns of the two groups of low-voltage coils is the same, and the number of turns of the two groups of high-voltage coils is the same.
[0009] In this way, the filling coefficient of the single-frame wound core is larger, the magnetic circuit is equal and shorter, and the noise generated during operation is relatively smaller.
[0010] As a further improvement of the present utility model, the leading end of the high-voltage coil is connected to the high-voltage porcelain bushing, and a voltage regulating tap is provided at the trailing end of the high-voltage coil.
[0011] In this way, the voltage magnitude input to the high-voltage side of the transformer can be adjusted through the voltage regulating tap.
[0012] As a further improvement of the present utility model, the heads and tails of all leads of the low-voltage coil are led to the low-voltage porcelain bushing.
[0013] In this way, the series or parallel connection of the output end can be realized through the low-voltage porcelain bushing of the transformer, providing multiple voltages for users.
[0014] As a further improvement of the present utility model, the sealed oil tank adopts a cylindrical structure.
[0015] In this way, the structure of the transformer is more stable, which is more conducive to the installation of the transformer on the telegraph pole, improving the aesthetic appearance. Description of the Drawings
[0016] Figure 1 It is a schematic structural diagram of the present utility model.
[0017] Figure 2 It is a top view of the present utility model.
[0018] Figure 3 It is Figure 1 a cross-sectional view of.
[0019] Figure 4 It is Figure 2 a cross-sectional view of.
[0020] Figure 5 It is a schematic structural diagram of the single-frame wound core in the present utility model.
[0021] Figure 6 It is a schematic diagram of the coil connection principle in the present utility model.
[0022] Among them, 1 is the high-voltage porcelain bushing, 2 is the low-voltage porcelain bushing, 3 is the sealed oil tank, 4 is the pole fixing assembly, 5 is the single-frame wound core, 6 is the high-voltage coil, 7 is the low-voltage coil, and 8 is the core column. Detailed Embodiment
[0023] The present utility model will be further described below in conjunction with the drawings:
[0024] As shown in Figures 1-6A single-phase pole-mounted transformer as shown includes a single-frame concentric winding structure which is arranged in a sealed oil tank 3. At the outer top of the sealed oil tank 3, a high-voltage porcelain bushing 1 is provided. At the upper outer part of the sealed oil tank 3, a low-voltage porcelain bushing 2 is provided. On the outer side of the sealed oil tank 3, a pole fixing assembly 4 is also provided, and the pole fixing assembly 4 is arranged opposite to the low-voltage porcelain bushing 2.
[0025] The single-frame concentric winding structure includes a single-frame wound core 5. On both sides of the single-frame wound core 5, a group of low-voltage coils 7 are respectively wound. The low-voltage coils 7 are connected in series between them. On the outer periphery of the low-voltage coils 7, a high-voltage coil 6 is wound. The high-voltage coils 6 are connected in series between them.
[0026] The number of turns of the two groups of low-voltage coils 7 is the same, and the number of turns of the two groups of high-voltage coils 6 is the same. The head of the high-voltage coil 6 is connected to the high-voltage porcelain bushing 1, and a voltage regulating tap is provided at the tail of the high-voltage coil 6. The heads and tails of all leads of the low-voltage coils 7 are led to the low-voltage porcelain bushing 2. The sealed oil tank 3 adopts a cylindrical structure.
[0027] In the present utility model, the single-frame wound core 5 is of an open type, and the coils adopt a concentric winding type. The low-voltage coils 7 are wound on the two core columns 8 on both sides of the single-frame wound core 5, and the high-voltage coil 6 is wound on the outside of the low-voltage coils 7. The high-voltage coil 6 is of a series type, the head is connected to the high-voltage porcelain bushing 1 outside the oil tank, and a voltage regulating tap is provided at the tail of the high-voltage coil 6, which can realize 3-step no-excitation voltage regulation. The heads and tails of all leads of the low-voltage coils 7 are led to the low-voltage porcelain bushing 2 of the oil tank, and series or parallel connection can be realized outside, providing multiple voltages for users. The assembled iron core and coils are installed in a cylindrical sealed oil tank. A pole fixing assembly 4 is provided on the outer side of the oil tank, which is convenient for outdoor installation.
[0028] The present utility model features the use of a single-frame wound core 5, which has a larger filling coefficient of the iron core. At the same time, its magnetic circuit is equal and shorter, and the relative running noise is very small. The high- and low-voltage windings are concentrically sleeved on the core columns 8, with the low-voltage coils 7 sleeved on the inner side and the high-voltage coils 6 wound on the outside. The two wound coils are respectively sleeved on the two core columns 8 on both sides of the single-frame wound core 5. This structure is beneficial to reducing the size of the windings and the overall size of the transformer, and is also convenient for heat dissipation and insulation.
[0029] The outer shell is of a cylindrical type, which is more convenient for installation on a single telegraph pole. The pole fixing assembly 4 of the single-phase pole-mounted transformer on the pole includes a connecting beam, a fixing hoop and bolts. The connecting beam adopts an I-shaped metal profile and is fixed on the outside of the sealed oil tank 3. The fixing hoop is sleeved on the telegraph pole and is connected and fixed to the connecting beam through bolts, so that the transformer is fixed on the telegraph pole, which can improve the stability, safety and aesthetics of the transformer fixation.
[0030] The present utility model is not limited to the above embodiments. Based on the technical solutions disclosed herein, those skilled in the art can make some substitutions and deformations to some of the technical features without creative labor according to the disclosed technical content, and these substitutions and deformations are all within the protection scope of the present utility model.
Claims
1. A single-phase pole-mounted transformer, characterized in that: It includes a single-frame concentric winding structure which is arranged inside a sealed oil tank. A high-voltage porcelain bushing is provided at the outer top of the sealed oil tank, and a low-voltage porcelain bushing is provided at the upper outer part of the sealed oil tank. A pole fixing assembly is also provided on the outer side of the sealed oil tank, and the pole fixing assembly is arranged opposite to the low-voltage porcelain bushing.
2. The single-phase pole-mounted transformer according to claim 1, wherein: The single-frame concentric winding structure includes a single-frame wound core. A group of low-voltage coils are respectively wound on both sides of the single-frame wound core, and the low-voltage coils are connected in series. A high-voltage coil is wound around the outer periphery of the low-voltage coils, and the high-voltage coils are connected in series.
3. The single-phase pole-mounted transformer according to claim 2, characterized in that: The number of turns of the two groups of low-voltage coils is the same, and the number of turns of the two groups of high-voltage coils is the same.
4. A single-phase pole-mounted transformer according to claim 3, characterized in that: The leading end of the high-voltage coil is connected to the high-voltage porcelain bushing, and a voltage regulating tap is provided at the trailing end of the high-voltage coil.
5. The single-phase pole-mounted transformer according to claim 3, wherein: The heads and tails of all leads of the low-voltage coils are led to the low-voltage porcelain bushing.
6. The single-phase pole-mounted transformer according to claim 1, wherein: The sealed oil tank adopts a cylindrical structure.