Fixing structure of mutual inductor and transformer

Abstract

The utility model belongs to the technical field of power equipment, and discloses a fixing structure of a mutual inductor and a transformer. The fixing structure of the mutual inductor specifically comprises a supporting plate, a limiting piece, a side plate and a fixing plate. The number of the limiting pieces is multiple, and every two limiting pieces are oppositely and vertically arranged on the supporting plate. The side plates are arranged on the two opposite sides of the limiting pieces, one end of each side plate is connected with the supporting plate, the side plates, the supporting plate and every two limiting pieces define a mounting cavity used for containing a mutual inductor, and the end, opposite to the supporting plate, of each side plate is provided with a connecting part; the fixing plate is connected with the connecting part and seals a cavity opening of the mounting cavity. By means of the fixing structure of the mutual inductor, economical efficiency can be effectively improved, meanwhile, the influence of the internal insulation distance is reduced, and safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a fixing structure of a mutual inductor and a transformer. Background Art

[0002] Transformers are an indispensable key device in power systems. They are mainly used to change the size of AC voltage to meet the needs of different electrical equipment. Through the principle of electromagnetic induction, transformers can achieve the transformation of voltage, current and impedance, providing convenience for the transmission, distribution and use of electrical energy.

[0003] In large liquid-immersed power transformers, it is usually necessary to install multiple transformers in the fixed structure of the transformer's transformer to monitor the current conditions during transformer operation and determine the transformer's operating status by changes in the current value. At the same time, the fluctuations in grid voltage and load can also be monitored through the synchronization of the three-phase current. There are two existing fixed structures for transformers. The first structure is that the tops of multiple groups of transformers are connected to the top plate, and the bottom uses the same support plate to hold up the transformers; the second structure is that the bottoms of multiple groups of transformers are fixed to the support plate, and each group of transformers is provided with a separate top plate, and long screws made of wood or metal are used to penetrate the limiters on both sides of the transformer.

[0004] The current first structure is unable to adapt to the height differences between multiple groups of transformers. In addition, when the diameter of the connecting sleeve is larger than the inner diameter of the transformer, the sleeve cannot be smoothly inserted into the through hole of the transformer, causing assembly difficulties. When the length of the tail end of the sleeve is less than the total height of the transformer, the tail end of the sleeve cannot be led out from the through hole of the transformer, causing wiring difficulties. The second structure solves the technical problems of the above first structure, but among the long screws used in the second structure, the wooden long screws are prone to loosening due to their low strength, which reduces the service life and increases the maintenance cost. The metal long screws are made of stainless steel or blackened, with high manufacturing costs. At the same time, the lower bolts will be immersed in the oil tank and close to the coil contacts, thereby affecting the internal insulation distance and reducing safety. Utility Model Content

[0005] The purpose of the utility model is to provide a fixing structure of a mutual inductor and a transformer, which are used to improve economy, reduce the influence of internal insulation distance and improve safety.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The fixing structure of the transformer includes:

[0008] Pallet;

[0009] There are multiple limiters, and every two limiters are arranged opposite to each other on the support plate;

[0010] Side plates are arranged on opposite sides of the stopper, one end of the side plate is connected to the support plate, the side plate, the support plate and every two of the stoppers respectively enclose to form a mounting cavity for accommodating the mutual inductor, and one end of each side plate opposite to the support plate is respectively provided with a connecting portion;

[0011] A fixing plate is connected to the connecting portion, and the fixing plate closes the cavity opening of the installation cavity.

[0012] As an optional solution for the fixing structure of a mutual inductor, a reinforcement piece is correspondingly provided on the outer side of each of the limit members, and one side of the reinforcement piece is in contact with the limit member.

[0013] As an optional solution for the fixing structure of a mutual inductor, the limiter includes a first surface for fitting with the mutual inductor and a second surface for fitting with the reinforcement member, the first surface is an arcuate surface, and the second surface is a plane.

[0014] As an optional solution for the fixing structure of a transformer, the fixing plate is a rectangular plate, and each of the side plates is provided with two connecting parts, each of which is connected to a position of the fixing plate close to a vertex.

[0015] As an optional solution for the fixing structure of a mutual inductor, the reinforcement member is a plate-shaped member.

[0016] As an optional solution for the fixing structure of a transformer, a screw hole is provided on the connecting portion, and a through hole is correspondingly provided on the fixing plate. A fastener can pass through the through hole and be screwed to the screw hole. The fastener is arranged away from one end of the fixing plate and the gap between the support plate.

[0017] As an optional solution for the fixing structure of a mutual inductor, a position of the limiting member relative to the connecting portion is provided with an avoidance structure, and the avoidance structure is used to avoid the connecting portion.

[0018] As an optional solution for the fixing structure of a mutual inductor, the avoidance structure is a first chamfer or a first rounded corner provided on the limiting member.

[0019] As an optional solution for the fixing structure of a mutual inductor, a second chamfer or a second rounded corner matching the first chamfer or the first rounded corner is provided on the connection portion near the avoidance structure.

[0020] The transformer comprises a mutual inductor and a mounting flange and a fixing structure of the mutual inductor as described in any of the above schemes, wherein the mutual inductor is arranged in the mounting cavity, and the mounting flange is arranged opposite to the support plate and connected to the side plate.

[0021] Beneficial effects:

[0022] In the first aspect of the utility model, the fixing structure of the transformer completely limits and fixes the transformer through a support plate, two side plates, two limit members and a fixed plate. Furthermore, a connecting portion is protruding from the inner wall of the side plate to connect the fixed plate to the connecting portion. The fixed plate closes the installation cavity and thus limits the transformer in the installation cavity. There is a large gap between the connecting portion and the support plate, which can solve the various disadvantages caused by the long screw through-type connection scheme used in the second structure fixed transformer adopted in the prior art, and improves the economy to a certain extent, while ensuring the insulation distance and improving safety.

[0023] In the second aspect of the utility model, for the same transformer, the above-mentioned transformer fixing structure is used to fix the transformer, which can effectively adapt to transformers of different medium and high heights and improve adaptability. At the same time, it solves the problem of using long metal screws in the prior art to affect the internal insulation distance, and effectively improves the safety of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the internal structure of the fixing structure of the mutual inductor provided in the embodiment of the utility model;

[0025] Figure 2 It is a top view of the hidden part structure of the fixed structure of the mutual inductor provided in the embodiment of the utility model;

[0026] Figure 3 It is a top view of the position limiting member provided in the embodiment of the utility model;

[0027] Figure 4 It is a schematic diagram of the structure of the cooperation between the limiter and the mutual inductor provided in the embodiment of the utility model;

[0028] Figure 5 is a top view of the connecting portion provided by an embodiment of the utility model;

[0029] Figure 6 is a top view of a fixing plate provided in an embodiment of the utility model;

[0030] Figure 7 It is a top view of a support plate provided in an embodiment of the utility model.

[0031] In the figure:

[0032] 100. Transformer; 1. Support plate; 11. Lead-out hole; 2. Limiting member; 21. First surface; 22. Second surface; 23. First chamfer; 3. Side plate; 31. Connecting portion; 311. Screw hole; 312. Second chamfer; 4. Fixing plate; 41. Through hole; 42. Lead-in hole; 5. Reinforcement member; 6. Fastener; 7. Mounting flange. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] Please see attached Figure 1 and attached Figure 2The first aspect of the present embodiment relates to a fixing structure of a transformer (hereinafter referred to as "structure"), which is used to fix the transformer 100, and specifically includes a support plate 1, a limiter 2, a side plate 3 and a fixing plate 4. A plurality of limiters 2 are provided, and every two limiters 2 are relatively arranged on the support plate 1; the side plates 3 are arranged on two opposite sides of the limiters 2, and one end of the side plates 3 is connected to the support plate 1. The side plates 3, the support plate 1 and every two limiters 2 are respectively enclosed to form an installation cavity for accommodating the transformer 100, and a connecting portion 31 is respectively provided at one end of each side plate 3 opposite to the support plate 1; the fixing plate 4 is connected to the connecting portion 31, and the fixing plate 4 closes the cavity opening of the installation cavity.

[0038] In this embodiment, three groups of mutual inductors 100 are installed in the same structure. Of course, the heights of the three groups of mutual inductors 100 can be the same or different. The support plate 1 is a plate-shaped member used to support the three groups of mutual inductors 100 thereon. The side plates 3 are vertically arranged on both sides of the mutual inductors 100 and the mutual inductors 100 are clamped between the two side plates 3. Two limit members 2 are respectively arranged on the other two sides of the mutual inductor 100. An installation cavity that can accommodate the mutual inductor 100 is formed by the two side plates 3, the two limit members 2 and the support plate 1. In this embodiment, three installation cavities are provided to accommodate the three groups of mutual inductors 100 respectively. Further, a fixing plate 4 is provided on the top cover of the mutual inductor 100. For each group of mutual inductors 100, there is a corresponding fixing plate 4 located at the top limit, which can improve the adaptability to multiple groups of mutual inductors 100 of different heights. The transformer 100 is completely limited and fixed by the support plate 1, two side plates 3, two limit members 2 and the fixing plate 4. The fixing plate 4 is further connected to the connecting portion 31 by protruding through the inner wall of the side plate 3 to close the cavity opening of the installation cavity. The connecting portion 31 is set according to the height of the transformer 100 and is close to the top of the transformer 100. It can solve the various disadvantages caused by the long screw through-type connection scheme used in the second structure of fixing the transformer 100 in the prior art. In this embodiment, relatively short stainless steel fasteners can be directly used to connect the fixing plate 4 and the connecting portion 31, thereby ensuring the connection strength while reducing the material consumption, improving the economy to a certain extent, and at the same time ensuring the insulation distance and improving the safety.

[0039] Optionally, a reinforcement member 5 is correspondingly provided on the outer side of each limiting member 2 , and one side of the reinforcement member 5 is in contact with the limiting member 2 .

[0040] In this embodiment, the reinforcement member 5 is a plate-shaped member, specifically a quadrilateral thin plate, and each group of independent mutual inductors 100 is clamped on both sides by thin plate-shaped reinforcement members 5. Compared with a block structure, the reinforcement member 5 adopts a thin plate structure, which can reduce space occupation and reduce the overall weight. The reinforcement member 5 is specifically made of metal material and can be fixed on the support plate 1 by welding. The limiter 2 adopts a wooden structure. In addition to being used to limit the mutual inductor 100, the wooden structure has a certain degree of deformability. While clamping the mutual inductor 100, it can protect the outer wall of the mutual inductor 100, avoiding the damage to the structure of the mutual inductor 100 caused by the large force generated by the rigid extrusion contact during the assembly process, which affects the performance of the mutual inductor 100. During the actual assembly process, the two reinforcement members 5 have a pre-set installation distance. The mutual inductor 100 is installed from top to bottom between the two reinforcement members 5 in conjunction with the wooden limit members 2 on both sides, and the mutual inductor 100 and the wooden limit members 2 are clamped by the two reinforcement members 5. Of course, in other embodiments, if the distance between two groups of mutual inductors 100 is relatively close, the reinforcement member 5 can be eliminated and the corresponding multiple groups of mutual inductors 100 can be directly clamped by the interaction of two adjacent wooden limit members 2.

[0041] Please see attached Figure 1 -Attached Figure 4 Furthermore, the stopper 2 includes a first surface 21 for fitting with the mutual inductor 100 and a second surface 22 for fitting with the reinforcement member 5, the first surface 21 is an arc surface, and the second surface 22 is a plane.

[0042] In the present embodiment, by processing the first surface 21 of the limit member 2 facing the transformer 100 into an arc-shaped surface, it can effectively adapt to the outer arc-shaped wall surface of the transformer 100; by processing the second surface 22 of the limit member 2 facing the reinforcement member 5 into a plane, it can adapt to the plate-shaped structure of the reinforcement member 5, so that the two have a larger contact and extrusion surface, thereby ensuring the reliability of contact and extrusion. In the present embodiment, the reinforcement member 5 and the side panel 3 are enclosed to form a square area, which is a space for accommodating the transformer 100 and the limit member 2. If necessary, the reinforcement member 5 and the side panel 3 can be connected by welding or plugging to form a closed square area, or a gap can be set between the two to form an unclosed square area.

[0043] Please continue to refer to the attached Figure 1 , Attachment Figure 2 and attached Figure 5 Optionally, the fixed plate 4 is a rectangular plate, and each side plate 3 is provided with two connecting parts 31, each connecting part 31 is connected to the fixed plate 4 near the top corner.

[0044] In this embodiment, the connecting portion 31 is a rectangular block structure protruding from the inner wall of the side panel 3, and the fixed plate 4 is a rectangular plate with four right-angled vertices. Two connecting portions 31 are provided on each side panel 3, which are respectively arranged at positions close to the vertices of the fixed plate 4. During assembly, the four vertices of the fixed plate 4 are first placed on the corresponding connecting portions 31, and the fixed plate 4 is further connected to the connecting portions 31.

[0045] Optionally, a screw hole 311 is provided on the connecting portion 31 , and a through hole 41 is correspondingly provided on the fixing plate 4 . The fastener 6 can pass through the through hole 41 and be screwed to the screw hole 311 . The fastener 6 is arranged with a gap between one end away from the fixing plate 4 and the supporting plate 1 .

[0046] In this embodiment, a screw hole 311 extending along the vertical direction is provided on the connection part 31, and the fastener 6 adopts a screw, which passes through the corresponding through hole 41 on the fixing plate 4 and is screwed with the screw hole 311, so that the fixing plate 4 can be connected to the connection part 31. The fastener 6 can adopt a relatively short screw. When the fastener 6 and the connection part 31 are screwed, one end of the fastener 6 can be buried in the connection part 31 or pass through the connection part 31. When one end of the fastener 6 passes through the connection part 31, a sufficient gap is still maintained between one end of the fastener 6 and the support plate 1 to ensure that while the fastener 6 adopts a metal screw to enhance the connection strength, it can also further ensure the insulation gap and improve the insulation.

[0047] Please see attached Figure 3 and attached Figure 4 Optionally, a avoidance structure is provided at the position of the limiting member 2 relative to the connecting portion 31 , and the avoidance structure is used to avoid the connecting portion 31 , and the avoidance structure is a first chamfer 23 or a first fillet provided on the limiting member 2 .

[0048] Since the connection part 31 is convex inward in the area where the transformer 100 is fixed, an avoidance structure is set at the position of the limit member 2 corresponding to the connection part 31 in the vertical direction to facilitate the assembly of the limit member 2. Specifically, the avoidance structure can be directly designed as a chamfer or a rounded corner, that is, the first chamfer 23 or the first rounded corner is processed at the corresponding top angle position of the limit member 2 to avoid the connection part 31, thereby facilitating the assembly of the limit member 2.

[0049] Please see attached Figure 5 Furthermore, a second chamfer 312 or a second rounded corner matching the first chamfer 23 or the first rounded corner is provided on the connection portion 31 near the avoidance structure.

[0050] Correspondingly, a second chamfer 312 or a second rounded corner can also be processed on the connecting portion 31 near the first chamfer 23 or the first rounded corner to avoid the vertical edge of the connecting portion 31 facing the limiter 2. While playing an avoidance role, it can also ensure that the assemblers can assemble the transformer 100 and the limiter 2 without being scratched by the sharp edges of the connecting portion 31.

[0051] The second aspect of this embodiment also relates to a transformer, which includes a mutual inductor 100, a mounting flange 7 and the above fixing structure of the mutual inductor, the mutual inductor 100 is arranged in the mounting cavity, the mounting flange 7 is arranged opposite to the support plate 1 and connected to the side plate 3.

[0052] Please see attached Figure 1 , Attachment Figure 6 and attached Figure 7 In this embodiment, the mounting flange 7 is screwed on the outward extension plate at the top of the side plate 3. The opening of the mounting flange 7 corresponding to each transformer 100 is used to pass the bushing. Specifically, the bushing passes through the hole of the mounting flange 7 and penetrates into the interior of the structure. The connecting wire on the bushing or the partial structure at the bottom of the bushing passes through the inner circle of the transformer 100 and is connected to form a loop. Furthermore, an introduction hole 42 is provided on the fixing plate 4, and the bushing or the connecting wire can be introduced into the introduction hole 42 and enter the transformer 100. The support plate 1 is also provided with a lead-out hole 11 corresponding to each group of transformers 100, and the connecting wire passing through the transformer 100 can be led out through the lead-out hole 11.

[0053] The same transformer uses the above fixing structure of the transformer 100 to fix the transformer, which can effectively adapt to transformers 100 of different heights and improve adaptability. At the same time, it solves the problem of using long metal screws in the prior art to affect the internal insulation distance, effectively improving the safety of the transformer.

[0054] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. The fixing structure of the mutual inductor is characterized in that: include: A support plate (1); A plurality of limiting members (2) are provided, and every two limiting members (2) are arranged opposite to each other on the support plate (1); Side plates (3) are arranged on two opposite sides of the limiting member (2), one end of the side plate (3) is connected to the support plate (1), the side plate (3), the support plate (1) and each two limiting members (2) respectively enclose to form a mounting cavity for accommodating the mutual inductor (100), and a connecting portion (31) is respectively provided at one end of each side plate (3) opposite to the support plate (1); A fixing plate (4) is connected to the connecting portion (31), and the fixing plate (4) closes the cavity opening of the installation cavity.

2. The fixing structure of the mutual inductor according to claim 1, characterized in that: A reinforcement piece (5) is correspondingly provided on the outer side of each of the limiting pieces (2), and one side of the reinforcement piece (5) is in contact with the limiting piece (2).

3. The fixing structure of the mutual inductor according to claim 2, characterized in that: The limiting member (2) comprises a first surface (21) for being fitted with the mutual inductor (100) and a second surface (22) for being fitted with the reinforcing member (5); the first surface (21) is an arcuate surface, and the second surface (22) is a plane.

4. The fixing structure of the mutual inductor according to claim 2, characterized in that: The fixing plate (4) is a rectangular plate, and each of the side plates (3) is provided with two connecting portions (31), each of the connecting portions (31) being connected to a position of the fixing plate (4) close to a vertex.

5. The fixing structure of the mutual inductor according to claim 2, characterized in that: The reinforcement member (5) is a plate-shaped member.

6. The fixing structure of the mutual inductor according to claim 1, characterized in that: The connecting portion (31) is provided with a screw hole (311), and the fixing plate (4) is correspondingly provided with a through hole (41); the fastener (6) can pass through the through hole (41) and be screwed to the screw hole (311); and the fastener (6) is arranged at a gap with one end away from the fixing plate (4) and the supporting plate (1).

7. The fixing structure of the mutual inductor according to claim 1, characterized in that: The position of the limiting member (2) relative to the connecting portion (31) is provided with an avoidance structure, and the avoidance structure is used to avoid the connecting portion (31).

8. The fixing structure of the mutual inductor according to claim 7, characterized in that: The avoidance structure is a first chamfer (23) or a first rounded corner arranged on the limiting member (2).

9. The fixing structure of the mutual inductor according to claim 8, characterized in that: A second chamfer (312) or a second rounded corner matching the first chamfer (23) or the first rounded corner is provided at a position on the connection portion (31) close to the avoidance structure.

10. A transformer, characterized in that It comprises a mutual inductor (100), a mounting flange (7), and a fixing structure of the mutual inductor according to any one of claims 1 to 9, wherein the mutual inductor (100) is arranged in the mounting cavity, and the mounting flange (7) is arranged opposite to the support plate (1) and connected to the side plate (3).

Images