Fixing structure for iron core and coil of transformer and transformer

Abstract

The utility model belongs to the field of transformers, and particularly relates to a fixing structure for a transformer iron core and a coil and a transformer. In order to solve the technical problem that when a fixing structure in the prior art is used for fixing an iron core and a coil of a small-capacity oil-immersed transformer, a back pressure nail cannot be pressed on a low-voltage coil and a high-voltage coil at the same time, the utility model provides the fixing structure for the iron core and the coil of the transformer. The fixing structure for the transformer iron core and the coil comprises a clamping piece and a side beam, a supporting plate adjacent to the side beam is arranged on the clamping piece, and a back pressure nail is installed on the supporting plate; the side beam comprises a pressing plate and a fixing plate, and the junction of the pressing plate and the fixing plate is located on the side, close to the supporting plate, of the fixing plate. The utility model further provides a transformer comprising the fixing structure for the transformer iron core and the coil. The junction of the pressing plate and the fixing plate is located on the side, close to the supporting plate, of the fixing plate, so that the distance between the supporting plate and the pressing plate can be reduced, and the back pressure nail is pressed on the low-voltage coil and the high-voltage coil at the same time.

Description

Technical Field

[0001] The utility model belongs to the field of transformers, and particularly relates to a fixing structure for a transformer iron core and a coil, and a transformer. Background Art

[0002] like Figure 1-5 As shown, when assembling the transformer, a fixing structure is required to clamp the iron core 8 and compact the entire coil, which specifically includes a low-voltage coil 4, a high-voltage coil 6 and an insulating layer 5 located between the low-voltage coil 4 and the high-voltage coil 6.

[0003] Specifically, Figure 1-2 As shown, when assembling the transformer, after the coil is mounted on the iron core 8, two clamps 1 and two side beams 2 ( Figure 1 Only one is shown in the figure) to clamp the upper end of the iron core 8 (equivalent to the fixing structure including the clamp and the side beam for clamping the iron core), and use the support plate 7 set on the clamp 1 to install the counter-pressure nail 9, which is used to press the insulating part of the upper end of the coil to indirectly press on the low-voltage coil 4 and the high-voltage coil 6, so as to compact the coil. Figure 1-5 As shown, the support plate 7 is arranged adjacent to the side beam 2 (equivalent to the support plate 7 being arranged adjacent to the side beam 2 on the clamp 1), and the support plate 7 is provided with a mounting hole 71, and the counter-pressure nail 9 is installed in the mounting hole 71 (equivalent to the mounting hole 71 for installing the counter-pressure nail 9 being arranged on the support plate 7); the clamp 1 and the side beam 2 are fixedly connected by screws, and an installation gap 3 for installing an insulating paperboard is reserved between the clamp 1 and the side beam 2, and an escape hole for escaping the screw is arranged on the insulating paperboard, a through hole for the screw to pass through is arranged on the clamp 1, and a threaded hole 23 is arranged on the side beam 2. Figure 1-5 As shown, the side beam 2 includes a clamping plate 21 for squeezing the iron core 8 and a fixing plate 22 arranged at both ends of the clamping plate 21 and fixedly connected to the clamp 1. Specifically, in the arrangement direction of the support plate 7 and the side beam 2, the clamping plate 21 is fixedly connected to the middle of the fixing plate 22, so that the side beam 2 is an "I"-shaped structure; the above-mentioned threaded hole 23 is arranged on the fixing plate 22, and the threaded hole 23 is a blind hole. The screw passes through the through hole on the clamp 1 and the avoidance hole on the insulating paperboard and is threadedly connected to the fixing plate 22 through the threaded hole 23, so that the clamp 1 and the side beam 2 clamp the iron core 8.

[0004] In the prior art, the size and specifications of the fixing structure are fixed. When fixing the iron core and coil of a large-capacity oil-immersed transformer, the counter-pressure pins installed on the support plate can just press on the junction of the high-voltage coil and the low-voltage coil, thereby compacting the two coils. Figure 1-2As shown, when fixing the iron core 8 and coil of a small-capacity oil-immersed transformer, the outer diameters of the low-voltage coil 4 and the high-voltage coil 6 are small while the size of the iron core 8 remains unchanged. When the clamping plate 21 clamps the iron core 8, the counter-pressure pins 9 installed on the support plate 7 can only press on the high-voltage coil 6, but not on the low-voltage coil 4, resulting in uneven force on the low-voltage coil 4 and the entire coil not being compacted. At the same time, since the clamping plate 21 is fixedly connected to the middle of the fixing plate 22, the distance between the support plate 7 and the fixing plate 22 is very small, so it is impossible to improve the support plate 7 to make it closer to the clamping plate 21 so as to simultaneously compress the low-voltage coil 4 and the high-voltage coil 6. Therefore, the above-mentioned fixing structure cannot be applied to small-capacity oil-immersed transformers. Utility Model Content

[0005] The utility model aims to provide a fixing structure for transformer core and coil, so as to solve the technical problem that when using the fixing structure in the prior art to fix the core and coil of a small-capacity oil-immersed transformer, since the outer diameter of the low-voltage coil is small, and the clamping plate is fixedly connected to the middle of the fixing plate, the distance between the support plate and the fixing plate is very small, so the support plate cannot be improved to make it closer to the clamping plate so as to clamp the low-voltage coil and the high-voltage coil at the same time, and therefore the above-mentioned fixing structure cannot be applied to small-capacity oil-immersed transformers.

[0006] The utility model also aims to provide a transformer to solve the same technical problem as above.

[0007] To achieve the above-mentioned purpose, the technical solution of the fixing structure for the transformer core and coil provided by the utility model is:

[0008] A fixing structure for a transformer core and coil, comprising a clamp and a side beam for clamping the core, the clamp being provided with a support plate adjacent to the side beam, and counter-pressure nails being installed on the support plate; the side beam comprising a clamping plate for squeezing the core and a fixing plate arranged at both ends of the clamping plate and fixedly connected to the clamp, the junction of the clamping plate and the fixing plate being located on a side of the fixing plate close to the support plate, so that the spacing between the clamping plate and the support plate is sufficient so that the counter-pressure nails can be pressed on the low-voltage coil and the high-voltage coil at the same time during use.

[0009] Furthermore, in the arrangement direction of the support plate and the side beam, the end surface of the clamping plate close to the support plate is flush with the end surface of the fixing plate close to the support plate.

[0010] Furthermore, the fixing plate is provided with a threaded hole for cooperating with a screw to fix the fixing plate and the clamp, and the threaded hole is a through hole.

[0011] Furthermore, an escape space is provided on the clamping plate for accommodating the screws passing through the threaded holes.

[0012] Furthermore, along the arrangement direction of the side beams and the support plates, an avoidance groove is provided on the end surface of the clamping plate away from the support plate; one end of the avoidance groove extends to the fixing plate to avoid the screws passing through the threaded hole, and the avoidance groove constitutes the avoidance space.

[0013] Furthermore, the avoidance groove is in the shape of a cuboid.

[0014] Furthermore, the clamping plate is provided with an avoidance through hole extending along the arrangement direction of the side beam and the support plate; one end of the avoidance through hole extends to the fixing plate to avoid the screws passing through the threaded hole, and the avoidance through hole constitutes the avoidance space.

[0015] Furthermore, along the arrangement direction of the side beams and the support plates, the threaded holes are located in the middle of the fixing plates.

[0016] Furthermore, along the arrangement direction of the side beams and the support plates, the length of the clamping plate is 0.3-0.5 times the length of the fixing plate.

[0017] The beneficial effects of the fixing structure for transformer core and coil of the utility model are as follows: the utility model is an improved invention. The core can be clamped by the clamp and the side beam, and the coil can be pressed by the counter-pressure pins on the support plate adjacent to the side beam; in the arrangement direction of the support plate and the side beam, under the premise that the size of the core remains unchanged, the position of the clamp plate remains unchanged compared to the technical solution in the prior art that the clamp plate is fixedly connected to the middle of the fixed plate, and the junction of the clamp plate and the fixed plate is located on the side of the fixed plate close to the support plate, so that the distance between the fixed plate and the support plate can be increased, thereby moving the support plate in the direction from the support plate to the side beam, reducing the distance between the clamp plate and the support plate, making the support plate closer to the clamp plate and pressing on the low-voltage coil and high-voltage coil of the small-capacity oil-immersed transformer at the same time, to ensure that the entire coil is compacted.

[0018] To achieve the above purpose, the technical solution of the transformer provided by the utility model is:

[0019] A transformer comprises an iron core, a coil and a fixing structure for clamping the iron core and compacting the entire coil, the fixing structure comprising a clamp and a side beam for clamping the iron core, the clamp is provided with a support plate adjacent to the side beam, and the support plate is provided with a counter-pressure nail; the side beam comprises a clamping plate for squeezing the iron core and a fixing plate arranged at both ends of the clamping plate and fixedly connected to the clamp, the junction of the clamping plate and the fixing plate is located on the side of the fixing plate close to the support plate, so that the spacing between the clamping plate and the support plate is sufficient so that the counter-pressure nail can be pressed on the low-voltage coil and the high-voltage coil at the same time when in use.

[0020] Furthermore, in the arrangement direction of the support plate and the side beam, the end surface of the clamping plate close to the support plate is flush with the end surface of the fixing plate close to the support plate.

[0021] Furthermore, the fixing plate is provided with a threaded hole for cooperating with a screw to fix the fixing plate and the clamp, and the threaded hole is a through hole.

[0022] Furthermore, an escape space is provided on the clamping plate for accommodating the screws passing through the threaded holes.

[0023] Furthermore, along the arrangement direction of the side beams and the support plates, an avoidance groove is provided on the end surface of the clamping plate away from the support plate; one end of the avoidance groove extends to the fixing plate to avoid the screws passing through the threaded hole, and the avoidance groove constitutes the avoidance space.

[0024] Furthermore, the avoidance groove is in the shape of a cuboid.

[0025] Furthermore, the clamping plate is provided with an avoidance through hole extending along the arrangement direction of the side beam and the support plate; one end of the avoidance through hole extends to the fixing plate to avoid the screws passing through the threaded hole, and the avoidance through hole constitutes the avoidance space.

[0026] Furthermore, along the arrangement direction of the side beams and the support plates, the threaded holes are located in the middle of the fixing plates.

[0027] Furthermore, along the arrangement direction of the side beams and the support plates, the length of the clamping plate is 0.3-0.5 times the length of the fixing plate.

[0028] The transformer of the utility model has the following beneficial effects: the utility model is an improved invention. The iron core can be clamped by the clamps and the side beams, and the coil can be pressed by the counter-pressure pins on the support plate adjacent to the side beams; in the arrangement direction of the support plate and the side beams, under the premise that the size of the iron core remains unchanged, the position of the clamping plate remains unchanged compared to the technical solution in the prior art that the clamping plate is fixedly connected to the middle of the fixed plate, and the junction between the clamping plate and the fixed plate is located on the side of the fixed plate close to the support plate, so that the distance between the fixed plate and the support plate can be increased, thereby moving the support plate in the direction from the support plate to the side beam, reducing the distance between the clamping plate and the support plate, making the support plate closer to the clamping plate and pressing on the low-voltage coil and the high-voltage coil of the small-capacity oil-immersed transformer at the same time, to ensure that the entire coil is compacted. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a partial top view schematic diagram of a fixing structure for a transformer core and a coil in the prior art;

[0030] Figure 2 It is a right side schematic diagram of a fixing structure for a transformer core and a coil in the prior art;

[0031] Figure 3 for Figure 1 A front view of the side beam in FIG.

[0032] Figure 4 for Figure 1 Left side view of the side beam in;

[0033] Figure 5 for Figure 1 A top view of the side beam in FIG.

[0034] Figure 6 It is a partial top view schematic diagram of an embodiment of the fixing structure for the transformer core and coil in the utility model;

[0035] Figure 7 for Figure 6 A front view of a side beam;

[0036] Figure 8 for Figure 6 A left side view of a side beam;

[0037] Fig. 9 for Figure 6 A top view of a side beam;

[0038] Fig.10 for Figure 6 Schematic diagram of the structure of the insulating paperboard required for use;

[0039] Fig.11 The utility model is a left view of another side beam of the fixing structure for the transformer core and coil.

[0040] Description of reference numerals:

[0041] 1. Clamp; 2. Side beam; 21. Clamping plate; 22. Fixing plate; 23. Threaded hole; 24. Avoidance space; 3. Installation gap; 31. Insulation cardboard; 32. Avoidance hole; 4. Low-voltage coil; 5. Insulation layer; 6. High-voltage coil; 7. Support plate; 71. Installation hole; 8. Iron core; 9. Counter-pressure nail. DETAILED DESCRIPTION

[0042] In order to solve the problems in the background technology, the core inventive concept of the utility model is as follows: on the premise that the size of the iron core remains unchanged, from one perspective, in the arrangement direction of the support plate and the side beam, the junction of the clamping plate and the fixed plate is moved from the middle of the fixed plate along the direction from the fixed plate to the support plate to the edge of the fixed plate, so that the support plate can move in the direction from the support plate to the fixed plate, reducing the distance between the support plate and the clamping plate, ensuring that the counter-pressure pins can be pressed on the low-voltage coil and the high-voltage coil at the same time, ensuring that the entire coil is compacted; from another perspective, in the arrangement direction of the support plate and the side beam, on the premise that the clamping plate always presses the iron core, the position of the clamping plate remains unchanged, and the fixed plate moves in the direction from the support plate to the fixed plate, so that the support plate can also move in the direction from the support plate to the fixed plate, reducing the distance between the support plate and the clamping plate, ensuring that the counter-pressure pins can be pressed on the low-voltage coil and the high-voltage coil at the same time, ensuring that the entire coil is compacted.

[0043] The present invention is further described in detail below in conjunction with the embodiments.

[0044] Specific embodiments of the fixing structure for transformer core and coil provided by the utility model:

[0045] like Figure 6-10 As shown, as a specific embodiment, the fixing structure for the transformer core and coil includes a clamp 1 and a side beam 2 for clamping the core 8, the clamp 1 is provided with a support plate 7 adjacent to the side beam 2, and the support plate 7 is installed with a counter-pressure nail 9; the side beam 2 includes a clamping plate 21 for squeezing the core 8 and a fixing plate 22 arranged at both ends of the clamping plate 21 and fixedly connected to the clamp 1, and the junction between the clamping plate 21 and the fixing plate 22 is located on the side of the fixing plate 22 close to the support plate 7, so that the distance between the clamping plate 21 and the support plate 7 meets the requirement that the counter-pressure nail 9 can be pressed on the low-voltage coil 4 and the high-voltage coil 6 at the same time when in use.

[0046] At the same time, under the premise of ensuring the structural strength, the clamping plate 21 and the fixing plate 22 are thinned in this specific embodiment to reduce the cost of raw materials. Specifically, the clamping plate 21 can be formed integrally with the fixing plate 22; or, the clamping plate 21 and the fixing plate 22 are fixedly connected by welding or the like; an insulating layer 5 is provided between the low-voltage coil 4 and the high-voltage coil 6; a mounting hole 71 is provided on the support plate 7, and the counter-pressure nail 9 is installed in the mounting hole 71.

[0047] The iron core 8 can be clamped by the clamp 1 and the side beam 2, and the coil can be compacted by the counter-pressure nail 9 when in use through the mounting hole 71 on the support plate 7 adjacent to the side beam 2; in the arrangement direction of the support plate 7 and the side beam 2, under the premise that the size of the iron core remains unchanged, compared with the technical solution in the prior art where the clamping plate 21 is fixedly connected to the middle of the fixing plate 22, the position of the clamping plate 21 remains unchanged, and the junction of the clamping plate 21 and the fixing plate 22 is located on the side of the fixing plate 22 close to the support plate 7, which can increase the fixed The distance between the fixed plate 22 and the support plate 7 is reduced, thereby moving the support plate 7 in the direction from the support plate 7 to the side beam 2, reducing the distance between the clamping plate 21 and the support plate 7, making the support plate 7 closer to the clamping plate 21 and pressing on the low-voltage coil 4 and the high-voltage coil 6 of the small-capacity oil-immersed transformer at the same time (the counter-pressure pin 9 presses the insulating part at the upper end of the low-voltage coil 4 and the high-voltage coil 6 to indirectly press on the low-voltage coil 4 and the high-voltage coil 6), ensuring that the force on the low-voltage coil 4 is more uniform and that the entire coil is compacted.

[0048] like Figure 6-9 As shown, in order to enable the counter-pressure pins 9 to be better pressed on the low-voltage coil 4, as a specific implementation method, in the arrangement direction of the support plate 7 and the side beam 2, the end surface of the clamping plate 21 close to the support plate 7 is flush with the end surface of the fixing plate 22 close to the support plate 7, so that on the basis of the clamping plate 21 clamping the iron core 8, the support plate 7 can be moved to the extreme position in the direction from the support plate 7 to the side beam 2, so that the counter-pressure pins 9 on the support plate 7 can be better pressed on the low-voltage coil 4, so that the force on the low-voltage coil 4 is more uniform, and the entire coil is better compacted.

[0049] Of course, in other specific embodiments, in the arrangement direction of the support plate 7 and the side beam 2, the end surface of the fixing plate 22 close to the support plate 7 can also protrude out of the end surface of the clamping plate 21 close to the support plate 7, as long as it can be ensured that the counter-pressure pin 9 can be pressed on the low-voltage coil 4 and the high-voltage coil 6 at the same time to compact the entire coil.

[0050] like Figure 6-9 As shown, in order to thin the fixing plate 22 and save material costs, as a specific embodiment, the fixing plate 22 is provided with a threaded hole 23 for cooperating with a screw to fix the fixing plate 22 and the clamp 1, and the threaded hole 23 is a through hole, so as to provide conditions for thinning the fixing plate 22. Compared with the technical solution in the prior art that the threaded hole 23 on the fixing plate 22 is a blind hole, the threaded hole 23 is set as a through hole, and the fixing plate 22 can be thinned while the length of the screw remains unchanged, thereby saving raw materials and reducing costs. However, in other specific embodiments, the threaded hole 23 on the fixing plate 22 can also be a blind hole.

[0051] like Figure 6-9As shown, in order to avoid interference between the clamping plate 21 and the screws passing through the threaded holes 23 of the fixing plate 22, as a specific embodiment, a clearance space 24 for avoiding the screws passing through the threaded holes 23 is provided on the clamping plate 21, thereby avoiding interference between the clamping plate 21 and the screws passing through the threaded holes 23 of the fixing plate 22. Of course, in other specific embodiments, the threaded holes 23 and the clamping plate 21 can also be arranged in a staggered manner along the arrangement direction of the side beam 2 and the support plate 7, thereby avoiding interference between the clamping plate 21 and the screws passing through the threaded holes 23 of the fixing plate 22. In this case, the clearance space 24 is not provided on the clamping plate 21.

[0052] like Figure 6-9 As shown, in order to enhance the structural strength of the clamping plate 21, as a specific implementation, along the arrangement direction of the side beam 2 and the support plate 7, an escape groove is provided on the end surface of the clamping plate 21 away from the support plate 7; one end of the escape groove extends to the fixing plate 22 to avoid the screws passing through the threaded hole 23, and the escape groove constitutes the escape space 24. Specifically, the shape of the escape groove is a rectangular parallelepiped for easy processing; but in other specific implementations, the shape of the escape groove can also be a semi-cylindrical shape or other shapes. In this embodiment, the shape of the escape groove is not limited, as long as the escape groove can avoid the screws to avoid interference between the screws and the clamping plate 21.

[0053] Of course, in other specific embodiments, Figure 6-9 On the basis of Fig.11 As shown, in order to simplify the structure, as a specific implementation method, the clamping plate 21 is provided with an avoidance through hole extending along the arrangement direction of the side beam 2 and the support plate 7; one end of the avoidance through hole extends to the fixing plate 22 to avoid the screws passing through the threaded hole 23, and the avoidance through hole constitutes the avoidance space 24, and the structure is simple.

[0054] Compared with the technical solution in which the escape space 24 is an escape through hole, the escape space 24 is an escape groove, which can enhance the structural strength of the pressing plate 21 .

[0055] like Figure 6-10As shown, in order to better process the threaded hole 23, as a specific embodiment, along the arrangement direction of the side beam 2 and the support plate 7, the threaded hole 23 is located in the middle of the fixing plate 22, so as to facilitate the processing of the threaded hole 23. At the same time, the insulating paperboard 31 installed in the installation gap 3 is also adjusted accordingly, and the avoidance hole 32 for avoiding the screw is also located in the middle of the insulating paperboard 31 along the arrangement direction of the side beam 2 and the support plate 7, so that the avoidance hole 32 corresponds to the threaded hole 23. However, in other specific embodiments, along the arrangement direction of the side beam 2 and the support plate 7, on the premise that the threaded hole 23 has a sufficient distance from the edge of the fixing plate 22, the threaded hole 23 can also be arranged eccentrically, and the avoidance hole 32 on the insulating paperboard 31 is also arranged eccentrically and corresponds to the threaded hole 23.

[0056] like Figure 6-9 As shown, in order to save costs and ensure the structural strength of the side beam 2, as a specific implementation, along the arrangement direction of the side beam 2 and the support plate 7, the length of the clamping plate 21 is 0.4 times the length of the fixed plate 22. Of course, in other specific implementations, along the arrangement direction of the side beam 2 and the support plate 7, the length of the clamping plate 21 is 0.3 times or 0.5 times the length of the fixed plate 22.

[0057] Since the clamping plate 21 needs to squeeze the iron core 8, under the premise that the size of the clamping plate 21 remains unchanged, along the arrangement direction of the side beam 2 and the support plate 7, when the length of the fixed plate 22 is small, the connection strength between the fixed plate 22 and the clamp 1 is poor, and it is not easy to process the threaded hole 23 on the fixed plate 22; when the length of the fixed plate 22 is long, on the one hand, raw materials are wasted, and on the other hand, the fixed plate 22 may extend to the iron core 8 and interfere with the iron core 8.

[0058] However, in other specific embodiments, in the arrangement direction along the side beam 2 and the support plate 7, the length of the clamping plate 21 may also be 0.6 times the length of the fixed plate 22. On the premise that the length of the fixed plate 22 remains unchanged, the length of the clamping plate 21 is increased, but it is necessary to ensure that the spacing between the clamping plate 21 and the support plate 7 is sufficient to ensure that the counter-pressure pin 9 can be pressed on the low-voltage coil 4 and the high-voltage coil 6 at the same time during use; or, in the arrangement direction along the side beam 2 and the support plate 7, the length of the clamping plate 21 may also be 0.4 times the length of the fixed plate 22. On the premise that the length of the clamping plate 21 remains unchanged, the length of the fixed plate 22 is increased, but it is necessary to ensure that the fixed plate 22 does not interfere with the iron core 8.

[0059] The specific steps of clamping the transformer core 8 and pressing the coil using the transformer core and coil fixing structure in this embodiment are the same as the specific steps of clamping the transformer core 8 and pressing the coil using the fixing structure in the prior art, and will not be repeated here.

[0060] The specific embodiment of the transformer provided by the utility model:

[0061] A transformer comprises an iron core, a coil and a fixing structure for clamping the iron core and compacting the entire coil. The fixing structure is any one of the specific embodiments of the fixing structure for the transformer iron core and coil provided by the utility model, which will not be described in detail here.

[0062] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A fixing structure for transformer core and coil, comprising a clamp for clamping the core and a side beam, the clamp is provided with a support plate close to the side beam, and a counter-pressure nail is installed on the support plate; the side beam comprises a clamping plate for squeezing the core and a fixing plate arranged at both ends of the clamping plate and fixedly connected to the clamp, characterized in that: The junction of the clamping plate and the fixing plate is located on the side of the fixing plate close to the support plate, so that the spacing between the clamping plate and the support plate is sufficient so that the counter-pressure pin can be pressed on the low-voltage coil and the high-voltage coil at the same time during use.

2. The fixing structure for transformer core and coil according to claim 1, characterized in that: In the arrangement direction of the support plate and the side beam, the end surface of the clamping plate close to the support plate is flush with the end surface of the fixing plate close to the support plate.

3. The fixing structure for transformer core and coil according to claim 1 or 2, characterized in that: The fixing plate is provided with a threaded hole for cooperating with a screw to fix the fixing plate and the clamp, and the threaded hole is a through hole.

4. The fixing structure for transformer core and coil according to claim 3, characterized in that: The pressing plate is provided with an escape space for escaping the screws penetrating from the threaded holes.

5. The fixing structure for transformer core and coil according to claim 4, characterized in that: In the arrangement direction of the side beams and the support plates, an avoidance groove is provided on the end surface of the clamping plate away from the support plate; one end of the avoidance groove extends to the fixing plate to avoid the screws passing through the threaded holes, and the avoidance groove constitutes the avoidance space.

6. The fixing structure for transformer core and coil according to claim 5, characterized in that: The avoidance groove is in the shape of a cuboid.

7. The fixing structure for transformer core and coil according to claim 4, characterized in that: The clamping plate is provided with an avoidance through hole extending along the arrangement direction of the side beam and the support plate; one end of the avoidance through hole extends to the fixing plate to avoid the screws passing through the threaded hole, and the avoidance through hole constitutes the avoidance space.

8. The fixing structure for transformer core and coil according to claim 3, characterized in that: In the arrangement direction of the side beams and the support plates, the threaded holes are located in the middle of the fixing plate.

9. The fixing structure for transformer core and coil according to claim 1 or 2, characterized in that: In the arrangement direction along the side beams and the support plates, the length of the clamping plate is 0.3-0.5 times the length of the fixing plate.

10. A transformer, comprising an iron core, a coil and a fixing structure for clamping the iron core and compacting the entire coil, characterized in that: The fixing structure is a fixing structure for a transformer core and a coil as described in any one of claims 1 to 9.

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