Anti-short-circuit single-phase transformer

Abstract

The utility model belongs to the technical field of single-phase transformers, and particularly relates to an anti-short-circuit single-phase transformer which comprises a square iron core. The two coils are respectively wound on two opposite sides of the iron core, and the axes of the coils are vertically arranged; the first supporting part is arranged between the iron core and the coil; the second supporting parts are arranged on the outer sides of the coils, and the two second supporting parts arranged on the two coils are far away from each other; and the connecting part is fixedly connected with the second supporting part. According to the utility model, the two coils are respectively wound on the two opposite sides of the iron core, the first supporting part is arranged in the gap between the iron core and the coils and is used for resisting the inward acting force of the coils, the second supporting part is arranged at the outer edge of the coils, and the second supporting part is fixed through the connecting part and is used for resisting the outward acting force of the coils; in the actual use process and the anti-short-circuit test process of the single-phase transformer, the coil is stable and does not deform, and therefore the anti-short-circuit capacity of the transformer is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of single-phase transformers, in particular to a short-circuit resistant single-phase transformer. Background Art

[0002] As one of the main equipment in the operation of the power grid, the safe and stable operation of the power transformer is related to the reliability of the power supply of the power grid. The State Grid has increasingly higher requirements for the quality of the power distribution transformer, and the transformer needs to meet the ability to resist sudden short circuits. When conducting a sudden short circuit impact test, the current flowing through the coil exceeds the rated current by more than ten times, which can easily cause the coil to deform and the insulation to break, causing the transformer to short circuit.

[0003] The single-phase transformer in the prior art has a weak ability to resist deformation and short circuit, so a short-circuit resistant single-phase transformer is urgently needed. Utility Model Content

[0004] The utility model aims to provide a short-circuit resistant single-phase transformer to solve the above problems.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] A short-circuit resistant single-phase transformer, comprising:

[0007] The iron core is arranged in a square shape;

[0008] Two coils are respectively wound on two opposite sides of the iron core, and the axes of the coils are vertically arranged;

[0009] A first supporting portion, disposed between the iron core and the coil;

[0010] A second support portion is arranged outside the coil, and two second support portions arranged on the two coils are far away from each other;

[0011] The connecting portion is fixedly connected to the second supporting portion.

[0012] Preferably, the first supporting portion comprises:

[0013] A first supporting assembly is disposed at the front and rear sides of the iron core and abuts against the inner edge of the coil;

[0014] The second supporting assembly is arranged on the inner and outer sides of the iron core and abuts against the inner edge of the coil.

[0015] Preferably, the first supporting assembly comprises:

[0016] A plurality of stays are respectively arranged on the front and rear sides of the core;

[0017] A plurality of steps are provided on both the front and rear sides of the iron core. The support bar is located in the steps and abuts against the inner edge of the coil. The support bar is arranged parallel to the axis of the coil.

[0018] Preferably, the second supporting assembly comprises:

[0019] Two support plates are both arranged at the inner edge of the coil and abut against the inner edge of the coil. The two support plates are centrally symmetrically arranged and abut against the inner side wall and the outer side wall of the iron core respectively.

[0020] Preferably, the second supporting portion comprises:

[0021] An insulating plate is abutted against the outer edge of the coil, the insulating plate is adapted to the coil, and the two insulating plates located on the two coils are away from each other;

[0022] A side reinforcing plate abuts against an outer edge of the insulating plate, the side reinforcing plate being adapted to the insulating plate;

[0023] The connecting plate is fixedly connected to a side of the side reinforcing plate away from the insulating plate, and the connecting plate is fixedly connected to the connecting portion.

[0024] Preferably, the connecting portion comprises:

[0025] Two clamping member groups are respectively arranged on the front and rear sides of the iron core.

[0026] Preferably, the clamping component group includes:

[0027] Two horizontally arranged clamps are arranged on the same side of the iron core, and the two clamps are respectively located at the upper and lower ends of the iron core;

[0028] Two support plates are fixedly connected to one side of the clamp close to the iron core by bolts, and the two support plates are close to two ends of the clamp respectively;

[0029] The connecting plate is fixedly connected between the four support plates located on the same side of the two clamping member groups, and the connecting plate is located on a side of the support plate away from the coil.

[0030] Preferably, a binding strap is tied at the outer edge of the coil.

[0031] Preferably, two pads are fixedly connected between the two clamps in the same clamp group, and the two pads are respectively arranged at two ends of the clamp, and one end of the pad extends out of the clamp and is fixedly connected with a pad foot.

[0032] Preferably, a reinforcing paint layer is coated on the end surface of the coil.

[0033] Compared with the prior art, the utility model has the following advantages and technical effects:

[0034] In the utility model, two coils are respectively wound on two opposite sides of the iron core, a first support portion is arranged in the gap between the iron core and the coil to resist the inward force of the coil, a second support portion is arranged at the outer edge of the coil, and the second support portion is fixed by a connecting portion to resist the outward force of the coil, so that the coil of the single-phase transformer is stable and does not deform during actual use and during the short-circuit resistance test, thereby enhancing the short-circuit resistance of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor:

[0036] Figure 1 It is a structural schematic diagram of the utility model;

[0037] Figure 2 It is a top view of the utility model;

[0038] Among them, 1. clamps; 2. coils; 3. iron cores; 4. reinforcing paint layers; 5. support plates; 6. connecting plates; 7. side reinforcement plates; 8. insulating plates; 9. stays; 10. support plates; 11. pads; 12. binding straps; 13. foot pads. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] Reference Figure 1 to Figure 2 The utility model discloses a short-circuit resistant single-phase transformer, comprising:

[0042] The iron core 3 is arranged in a square shape;

[0043] Two coils 2 are respectively wound on opposite sides of the iron core 3, and the axes of the coils 2 are vertically arranged;

[0044] A first supporting portion, arranged between the iron core 3 and the coil 2;

[0045] A second support portion is arranged outside the coil 2, and the two second support portions arranged on the two coils 2 are far away from each other;

[0046] The connecting portion is fixedly connected to the second supporting portion.

[0047] In the utility model, the two coils 2 are respectively wound on two opposite sides of the iron core 3, a first support portion is arranged in the gap between the iron core 3 and the coil 2, used to resist the inward force of the coil 2, a second support portion is arranged at the outer edge of the coil 2, and the second support portion is fixed by a connecting portion to resist the outward force of the coil 2, so that the coil 2 is stable and does not deform during actual use of the single-phase transformer and during the short-circuit resistance test, thereby enhancing the short-circuit resistance of the transformer.

[0048] Further optimizing the solution, the first support part includes:

[0049] The first support assembly is arranged at the front and rear sides of the iron core 3 and abuts against the inner edge of the coil 2;

[0050] The second supporting assembly is disposed on both the inner and outer sides of the iron core 3 and abuts against the inner edge of the coil 2 .

[0051] Further optimizing the scheme, the first support assembly includes:

[0052] A plurality of stays 9 are respectively arranged on the front and rear sides of the core 3;

[0053] A plurality of steps are provided on both the front and rear sides of the iron core 3 . The stay 9 is located in the steps and abuts against the inner edge of the coil 2 . The stay 9 is arranged parallel to the axis of the coil 2 .

[0054] The multiple steps located on the same side of the iron core 3 are distributed in an arc shape along the inner edge of the coil 2 .

[0055] The support bar 9 is set to be cylindrical, and is arranged at the step outside the iron core 3 and abuts against the inner edge of the coil 2, so as to resist the inward force of the coil 2.

[0056] Further optimizing the solution, the second support assembly includes:

[0057] The two support plates 10 are both arranged at the inner edge of the coil 2 and abut against the inner edge of the coil 2 . The two support plates 10 are arranged symmetrically with respect to the center, and the two support plates 10 abut against the inner wall and the outer wall of the iron core 3 respectively.

[0058] One side wall of one support plate 10 abuts against the inner side wall of the core 3, and another side wall of the support plate 10 abuts against the outer side wall of the core 3. The side wall of the support plate 10 away from the core 3 is adapted to and abuts against the inner edge of the coil 2, thereby resisting the inward force of the coil 2.

[0059] In order to prevent the support plate 10 or the support bar 9 from moving during use, the support bar 9 / the support bar 9 and the iron core 3 can be set to be in friction contact, or can be bonded by insulating glue, and the fixing method is not limited.

[0060] Further optimizing the solution, the second support part includes:

[0061] The insulating plate 8 is in contact with the outer edge of the coil 2. The insulating plate 8 is adapted to the coil 2. The two insulating plates 8 on the two coils 2 are away from each other.

[0062] The side reinforcing plate 7 abuts against the outer edge of the insulating plate 8, and the side reinforcing plate 7 is adapted to the insulating plate 8;

[0063] The connecting plate 6 is fixedly connected to a side of the side reinforcing plate 7 away from the insulating plate 8, and the connecting plate 6 is fixedly connected to the connecting portion.

[0064] The connecting plate 6 is fixed to the connecting portion, and the connecting plate 6 is fixed to the side reinforcing plate 7. The side reinforcing plate 7 is abutted with an insulating plate 8 on the side away from the connecting plate 6. The insulating plate 8 abuts against the outer wall of the coil 2 to resist the outward force of the coil 2. The insulating plate 8 is set as an epoxy plate, which is a prior art and is not limited. There is friction between the side reinforcing plate 7, the insulating plate 8 and the coil 2 to prevent the insulating plate 8 from moving.

[0065] Further optimization scheme, the connection part includes:

[0066] The two clamping member groups are respectively arranged at the front and rear sides of the iron core 3 .

[0067] To further optimize the solution, the clamping set includes:

[0068] Two horizontally arranged clamps 1 are arranged on the same side of the iron core 3, and the two clamps 1 are respectively located at the upper and lower ends of the iron core 3;

[0069] Two support plates 5 are fixedly connected to one side of the clamp 1 close to the iron core 3 by bolts, and the two support plates 5 are close to two ends of the clamp 1 respectively;

[0070] A connecting plate 6 is fixedly connected between the four supporting plates 5 located on the same side of the two clamping member groups. The connecting plate 6 is located on a side of the supporting plate 5 away from the coil 2 .

[0071] Four clamps 1 are arranged at the upper and lower ends of the front and rear sides of the iron core 3. The side of the clamp 1 close to the iron core 3 is fixedly connected with a support plate 5 by bolts, and the connecting plate 6 is fixedly connected to the support plate 5, thereby fixing the support plate 5. There is friction between the clamp 1 and the iron core 3, and the two clamps 1 on both sides clamp the iron core 3, thereby preventing the clamp 1 and the iron core 3 from moving relative to each other.

[0072] According to a further optimized solution, a binding band 12 is tied to the outer edge of the coil 2 .

[0073] The coil 2 is fixed by means of a binding band 12 .

[0074] According to a further optimized solution, two pads 11 are fixedly connected between two clamps 1 in the same clamp group. The two pads 11 are respectively arranged at two ends of the clamp 1 , and one end of the pad 11 extends out of the clamp 1 and is fixedly connected to a pad foot 13 .

[0075] The spacer 11 is used to connect the two clamps 1 on the same side, and the spacer 11 is made of insulating material; the foot 13 is used to facilitate the installation of the transformer, and is also made of insulating material.

[0076] In a further optimized solution, a reinforcing paint layer 4 is coated on the end surface of the coil 2. The function of the reinforcing paint layer 4 is to prevent the end surface of the coil from deforming.

[0077] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0078] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A short-circuit resistant single-phase transformer, characterized in that: include: The iron core (3) is arranged in a square shape; Two coils (2) are respectively wound on two opposite sides of the iron core (3), and the axes of the coils (2) are arranged vertically; A first supporting portion, arranged between the iron core (3) and the coil (2); A second support portion is arranged outside the coil (2), and the two second support portions arranged on the two coils (2) are spaced apart from each other; The connecting portion is fixedly connected to the second supporting portion.

2. A short-circuit resistant single-phase transformer according to claim 1, characterized in that: The first supporting portion comprises: A first supporting assembly, arranged on the front and rear sides of the iron core (3) and abutting against the inner edge of the coil (2); The second supporting component is arranged on both inner and outer sides of the iron core (3) and abuts against the inner edge of the coil (2).

3. A short-circuit resistant single-phase transformer according to claim 2, characterized in that: The first supporting assembly comprises: A plurality of stays (9) are respectively arranged on the front and rear sides of the iron core (3); A plurality of steps are provided on both the front and rear sides of the iron core (3); the support bar (9) is located in the steps and abuts against the inner edge of the coil (2); and the support bar (9) is arranged parallel to the axis of the coil (2).

4. A short-circuit resistant single-phase transformer according to claim 2, characterized in that: The second supporting assembly comprises: The two support plates (10) are both arranged at the inner edge of the coil (2) and abut against the inner edge of the coil (2). The two support plates (10) are centrally symmetrically arranged and respectively abut against the inner side wall and the outer side wall of the iron core (3).

5. The short-circuit resistant single-phase transformer according to claim 1, characterized in that: The second supporting portion comprises: An insulating plate (8) is abutted against the outer edge of the coil (2), the insulating plate (8) is adapted to the coil (2), and the two insulating plates (8) located on the two coils (2) are away from each other; A side reinforcing plate (7) abuts against the outer edge of the insulating plate (8), and the side reinforcing plate (7) is adapted to the insulating plate (8); The connecting plate (6) is fixedly connected to a side of the side reinforcing plate (7) away from the insulating plate (8), and the connecting plate (6) is fixedly connected to the connecting portion.

6. A short-circuit resistant single-phase transformer according to claim 5, characterized in that: The connecting portion comprises: Two clamping member groups are respectively arranged on the front and rear sides of the iron core (3).

7. A short-circuit resistant single-phase transformer according to claim 6, characterized in that: The clamping component group comprises: Two horizontally arranged clamps (1) are arranged on the same side of the iron core (3), and the two clamps (1) are respectively located at the upper and lower ends of the iron core (3); Two support plates (5) are fixedly connected to a side of the clamp (1) close to the iron core (3) by means of bolts, and the two support plates (5) are respectively close to two ends of the clamp (1); The connecting plate (6) is fixedly connected between the four supporting plates (5) located on the same side in the two clamping member groups, and the connecting plate (6) is located on a side of the supporting plate (5) away from the coil (2).

8. The short-circuit resistant single-phase transformer according to claim 1, characterized in that: A binding band (12) is tied at the outer edge of the coil (2).

9. The short-circuit resistant single-phase transformer according to claim 7, characterized in that: Two cushion blocks (11) are fixedly connected between the two clamps (1) in the same clamp group. The two cushion blocks (11) are respectively arranged at two ends of the clamp (1). One end of the cushion block (11) extends out of the clamp (1) and is fixedly connected to a cushion foot (13).

10. The short-circuit resistant single-phase transformer according to claim 1, characterized in that: The end surface of the coil (2) is coated with a reinforcing paint layer (4).

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