A pressure ring structure of oil-immersed transformer

Abstract

The utility model belongs to the technical field of transformer pressure plates, and particularly relates to a pressure ring structure of an oil-immersed transformer; comprising: a pressure plate body, the pressure plate body having a first side pressure plate and a second side pressure plate and a first arc pressure plate and a second arc pressure plate arranged between the first side pressure plate and the second side pressure plate ports, the first side pressure plate and the second side pressure plate being arranged on the winding, a first connecting rod and a second connecting rod being arranged between the two sides opposite to each other at the bottom of the first side pressure plate and the second side pressure plate, the first side pressure plate and the second side pressure plate being supported by the first connecting rod and the second connecting rod; and a flow guide assembly, arranged in the first side pressure plate and the second side pressure plate, for improving the insulation effect of the winding. The utility model provides an oil-immersed transformer pressure plate structure that improves the stability of the winding and the insulation effect between the windings.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer pressure plates, and in particular relates to a pressure ring structure of an oil-immersed transformer. Background Art

[0002] Oil-type transformer, also known as oil-immersed transformer. It is a structural type of transformer, that is, the transformer coil is immersed in oil. Due to the need for fire protection, oil-immersed transformers are generally installed in a separate transformer room or outdoors. They have the characteristics of large size, low cost, simple maintenance, good heat dissipation, strong overload capacity, and wide adaptability to the environment. When the transformer suddenly short-circuits, the winding has a relatively large axial force. At this time, the winding needs to be axially compressed.

[0003] The Chinese utility model patent with the publication date of CN206976147U discloses a transformer body interphase pressure plate device, including a low-voltage side upper pressure plate, a high-voltage side upper pressure plate, a lower pressure plate and a transformer body group. The transformer body group is composed of three transformer bodies connected side by side. A low-voltage side upper pressure plate and a high-voltage side upper pressure plate are respectively installed on the top of the low-voltage side and the top of the high-voltage side of the transformer body group. A lower pressure plate is respectively installed on the bottom of the low-voltage side and the bottom of the high-voltage side of the transformer body group. The low-voltage side upper pressure plate Both ends of the high-voltage side upper pressure plate and the lower pressure plate are located at the top of the transformer coils on both sides, and the middle parts of the low-voltage side upper pressure plate, the high-voltage side upper pressure plate and the lower pressure plate are located at the top of the transformer coils in the middle. Slots I, II and III are respectively opened in the middle of these three plates. Several pads are bonded to the back of these three plates. A limiting hole is opened on both sides of slots I, II and III. The low-voltage side upper pressure plate and the high-voltage side upper pressure plate are fixedly connected to the lower pressure plate by screws, and the screws pass through the upper and lower relative limiting holes.

[0004] Although the above patent does not produce rotational displacement of the pressure plate when the transformer encounters a sudden short circuit, thereby avoiding deviation of the pressure plate from the pressure-rotation position due to rotation, thereby protecting the transformer, the pressure plate of the above patent is relatively small in size, and the contact area between the pressure plate structure and the winding is relatively low, resulting in poor stability of the winding and poor insulation effect between the windings.

[0005] Therefore, in view of the above problems, a pressure plate structure of an oil-immersed transformer is provided to improve the stability of the winding and the insulation effect between the windings. Utility Model Content

[0006] The utility model aims to solve the above-mentioned technical problems and provide an oil-immersed transformer pressure plate structure which can improve the stability of windings and the insulation effect between windings.

[0007] In view of this, the utility model provides an oil-immersed transformer pressure ring structure, comprising:

[0008] The pressure plate body comprises a first side pressure plate and a second side pressure plate, and a first arc pressure plate and a second arc pressure plate arranged between the first side pressure plate and the second side pressure plate ports. The first side pressure plate and the second side pressure plate are arranged on the winding. A first connecting rod and a second connecting rod are arranged between the two sides opposite to each other at the bottom of the first side pressure plate and the second side pressure plate, respectively. The first side pressure plate and the second side pressure plate are supported by the first connecting rod and the second connecting rod.

[0009] and a flow guide assembly, which is arranged in the first side pressure plate and the second side pressure plate and is used to improve the insulation effect of the winding;

[0010] The flow guide components include:

[0011] A first guide groove is provided on the bottom surface of the first side pressure plate;

[0012] A second guide groove is provided on the bottom surface of the second side pressure plate;

[0013] The arc-shaped connecting rod is arranged on the first connecting rod and the second connecting rod, and a gap is left between the arc-shaped connecting rod and the first connecting rod and the second connecting rod.

[0014] In the present technical scheme, if the transformer suddenly short-circuits, the winding has a relatively large axial force. At this time, a pressure plate is needed to press the winding axially to avoid damage to the winding after a failure and to increase the service life of the winding. However, the current contact area between the pressure plate and the winding is relatively low, resulting in poor stability of the winding and poor insulation between the windings. For this reason, a first side pressure plate, a second side pressure plate, a first arc-shaped pressure plate, a second arc-shaped pressure plate, a first connecting rod and a second connecting rod are arranged to fit and press the top surface of the winding, and the cross-sections of the first side pressure plate, the second side pressure plate, the first arc-shaped pressure plate and the second arc-shaped pressure plate are arranged according to the cross-section of the winding.

[0015] Specifically, during operation, the first side pressure plate, the second side pressure plate, the first arc pressure plate and the second arc pressure plate, the first connecting rod and the second connecting rod are attached to and pressed against the top surface of the winding, thereby improving the stability of the winding and the insulation effect between the windings. The first guide groove and the second guide groove are arranged to improve the flow of the insulating oil on the top surface of the winding and thereby improve the heat dissipation of the winding. The arc-shaped connecting rod is arranged so that a gap is left between the first connecting rod and the second connecting rod, thereby improving the fluidity of the insulating oil and thereby improving the heat dissipation of the transformer.

[0016] In the above technical solution, further, the first side pressure plate and the second side pressure plate as well as the first arc pressure plate and the second arc pressure plate use polyester glue as an adhesive.

[0017] In the present technical solution, polyester glue is used as the adhesive for the first side pressure plate, the second side pressure plate, the first arc pressure plate and the second arc pressure plate. It has low viscosity and fast infiltration speed, which will make the first side pressure plate, the second side pressure plate, the first arc pressure plate and the second arc pressure plate more firm, have excellent adhesion to a variety of materials, and have good impact resistance, vibration resistance, wear resistance and other properties.

[0018] In any of the above technical solutions, further, mounting plates are provided on both sides of the first arc-shaped pressure plate and the second arc-shaped pressure plate.

[0019] In the technical solution, mounting plates are provided on both left and right sides of the first arc-shaped pressure plate and the second arc-shaped pressure plate, and the first arc-shaped pressure plate and the second arc-shaped pressure plate are fixedly mounted on the first connecting rod and the second connecting rod through the mounting plates.

[0020] In any of the above technical solutions, further, positioning holes are provided in parallel on the mounting plate.

[0021] In the present technical solution, positioning holes are opened on the mounting plate to facilitate mounting the mounting plate on the first connecting rod and the second connecting rod by bolt connection, thereby fixing the first arc pressure plate and the second arc pressure plate, so that the first arc pressure plate and the second arc pressure plate are more closely fitted and pressed against the top surface of the winding.

[0022] In any of the above technical solutions, further, an inner wall of the positioning hole is provided with an internal thread.

[0023] In the technical solution, the inner wall of the positioning hole is provided with an internal thread which is threadedly connected to the external thread on the outer surface of the bolt, so that it is convenient for disassembly and installation.

[0024] In any of the above technical solutions, further, there are at least three pressing plate bodies, which are distributed along the length direction of the first connecting rod and the second connecting rod, and two adjacent pressing plate bodies are separated from each other on one side.

[0025] In the technical solution, when in use, a gap is formed by separating two adjacent pressing plate bodies to ensure the fluidity of the insulating oil and avoid affecting the heat dissipation of the transformer.

[0026] In any of the above technical solutions, further, a card slot is formed internally between the first side pressure plate and the second side pressure plate and between the first arc pressure plate and the second arc pressure plate, and a card block is arranged between the first connecting rod and the second connecting rod. There are multiple card blocks, which are distributed along the length direction of the first connecting rod and the second connecting rod, and the card blocks correspond to the card slots.

[0027] In the present technical solution, when in use, the card groove formed between the first side pressure plate, the second side pressure plate, the first arc pressure plate and the second arc pressure plate is connected to the card block, so as to position the first side pressure plate, the second side pressure plate, the first arc pressure plate and the second arc pressure plate, so that the first side pressure plate, the second side pressure plate, the first arc pressure plate and the second arc pressure plate can fit the top surface of the winding more accurately, making it more stable.

[0028] In any of the above technical solutions, further, the outer surface of the card block is evenly spaced with protrusions, and the inner wall of the card slot is provided with grooves at positions corresponding to the protrusions, and the protrusions are snap-fitted with the grooves.

[0029] In the present technical solution, the card slot is connected to the card block, and the protrusion on the outer surface of the card block is embedded in the groove of the card slot, so that the groove clamps the protrusion, so that the first side pressure plate, the second side pressure plate, the first arc pressure plate and the second arc pressure plate are more stably fixed on the first connecting rod and the second connecting rod.

[0030] The beneficial effects of the utility model are:

[0031] 1. The first guide groove and the second guide groove are used to improve the flow of insulating oil on the top surface of the winding, thereby improving the heat dissipation of the winding. An arc-shaped connecting rod is provided so that a gap is left between the first connecting rod and the second connecting rod, thereby improving the fluidity of the insulating oil, thereby improving the heat dissipation of the transformer, and at the same time, improving the stability of the winding and the insulation effect between the windings;

[0032] 2. By using polyester glue as an adhesive, the first side pressure plate, the second side pressure plate, the first arc pressure plate and the second arc pressure plate are made more solid, and the impact resistance, vibration resistance, wear resistance and other properties are improved;

[0033] 3. By opening a positioning hole on the mounting plate, it is convenient for people to pass the bolt through the positioning hole, and install the mounting plate on the first connecting rod and the second connecting rod, which is convenient for disassembly and installation;

[0034] 4. The card slot is connected to the card block, and the protrusion on the outer surface of the card block is embedded in the groove of the card slot, so that the groove clamps the protrusion, so that the first side pressure plate, the second side pressure plate, the first arc pressure plate and the second arc pressure plate are more stably fixed on the first connecting rod and the second connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0036] Figure 2 This is the first cross-sectional view of the utility model;

[0037] Figure 3 It is a top view of the utility model;

[0038] Figure 4 It is a partial three-dimensional structural schematic diagram of the utility model;

[0039] Figure 5 It is a second cross-sectional view of the utility model;

[0040] The reference numerals in the figure are: 1. pressure plate body; 101. first side pressure plate; 102. second side pressure plate; 103. first arc pressure plate; 104. second arc pressure plate; 105. first connecting rod; 106. second connecting rod; 2. guide assembly; 21. first guide groove; 22. second guide groove; 23. arc connecting rod; 24. gap; 3. mounting plate; 4. positioning hole; 5. internal thread; 6. slot; 7. block; 8. protrusion; 9. groove. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0042] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0043] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0044] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0045] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0046] Embodiment 1:

[0047] like Figure 1-Figure 5 As shown, this embodiment provides an oil-immersed transformer pressure ring structure, including:

[0048] The pressure plate body 1 comprises a first side pressure plate 101 and a second side pressure plate 102, and a first arc pressure plate 103 and a second arc pressure plate 104 arranged between the first side pressure plate 101 and the second side pressure plate 102. The first side pressure plate 101 and the second side pressure plate 102 are arranged on the winding, and a first connecting rod 105 and a second connecting rod 106 are respectively arranged between the two opposite sides of the bottom of the first side pressure plate 101 and the second side pressure plate 102. The first side pressure plate 101 and the second side pressure plate 102 are supported by the first connecting rod 105 and the second connecting rod 106.

[0049] and a flow guide assembly 2, which is disposed in the first side pressure plate 101 and the second side pressure plate 102 and is used to improve the fluidity of the insulating oil on the top surface of the winding;

[0050] Wherein, the flow guide component 2 comprises:

[0051] A first guide groove 21 is provided on the bottom surface of the first side pressure plate 101;

[0052] The second guide groove 22 is formed on the bottom surface of the second side pressure plate 102;

[0053] The arc-shaped connecting rod 23 is disposed on the first connecting rod 105 and the second connecting rod 106 , and a gap 24 is left between the arc-shaped connecting rod 23 and the first connecting rod 105 and the second connecting rod 106 .

[0054] In the present technical solution, if the transformer is suddenly short-circuited, the winding has a relatively large axial force. At this time, a pressure plate is needed to press the winding axially to avoid damage to the winding after a failure and to increase the service life of the winding. However, the current contact area between the pressure plate and the winding is relatively low, resulting in poor stability of the winding and poor insulation between the windings. For this reason, a first side pressure plate 101, a second side pressure plate 102, a first arc-shaped pressure plate 103, a second arc-shaped pressure plate 104, a first connecting rod 105 and a second connecting rod 106 are arranged to fit and press the top surface of the winding, and the cross-sections of the first side pressure plate 101, the second side pressure plate 102, the first arc-shaped pressure plate 103 and the second arc-shaped pressure plate 104 are arranged according to the setting of the winding cross-section.

[0055] Specifically, during operation, the first side pressure plate 101, the second side pressure plate 102, the first arc pressure plate 103 and the second arc pressure plate 104, the first connecting rod 105 and the second connecting rod 106 are attached to and pressed against the top surface of the winding, thereby improving the stability of the winding and the insulation effect between the windings. The first guide groove 21 and the second guide groove 22 are arranged to improve the flow of the insulating oil on the top surface of the winding and thereby improve the heat dissipation of the winding. The arc connecting rod 23 is arranged so that a gap 24 is left between the first connecting rod 105 and the second connecting rod 106, thereby improving the fluidity of the insulating oil and thereby improving the heat dissipation of the transformer.

[0056] like Figure 1-Figure 3 As shown, in this embodiment, the first side pressing plate 101 and the second side pressing plate 102 as well as the first arc pressing plate 103 and the second arc pressing plate 104 are optimized to use polyester glue as an adhesive.

[0057] In the present technical solution, polyester glue is used as the adhesive for the first side pressure plate 101, the second side pressure plate 102, the first arc pressure plate 103 and the second arc pressure plate 104. The adhesive has low viscosity and fast wetting speed, which will make the first side pressure plate 101, the second side pressure plate 102, the first arc pressure plate 103 and the second arc pressure plate 104 more firm, have excellent adhesion to a variety of materials, and have good impact resistance, vibration resistance, wear resistance and other properties.

[0058] like Figure 1 and Figure 4 As shown, in this embodiment, it is optimized that mounting plates 3 are provided on both sides of the first arc-shaped pressing plate 103 and the second arc-shaped pressing plate 104 .

[0059] In this technical solution, mounting plates 3 are provided on the left and right sides of the first arc pressure plate 103 and the second arc pressure plate 104, and the first arc pressure plate 103 and the second arc pressure plate 104 are fixedly mounted on the first connecting rod 105 and the second connecting rod 106 through the mounting plates 3.

[0060] like Figure 1 and Figure 4 As shown, in this embodiment, it is optimized that positioning holes 4 are opened in parallel on the mounting plate 3 .

[0061] In the present technical solution, a positioning hole 4 is opened on the mounting plate 3, which is convenient for installing the mounting plate 3 on the first connecting rod 105 and the second connecting rod 106 by bolt connection, so as to fix the first arc pressure plate 103 and the second arc pressure plate 104, so that the first arc pressure plate 103 and the second arc pressure plate 104 are more closely fitted and pressed against the top surface of the winding.

[0062] like Figure 4 As shown, in this embodiment, it is optimized that the inner wall of the positioning hole 4 is provided with an internal thread 5.

[0063] In the present technical solution, the inner wall of the positioning hole 4 is provided with an internal thread 5 which is threadedly connected to the external thread on the outer surface of the bolt, so that it is convenient for disassembly and installation.

[0064] like Figure 1 As shown, in this embodiment, it is optimized that there are at least three pressing plate bodies 1, and the pressing plate bodies 1 are distributed along the length direction of the first connecting rod 105 and the second connecting rod 106, and two adjacent pressing plate bodies 1 are separated from each other on one side.

[0065] In the technical solution, when in use, two adjacent pressing plate bodies 1 are separated to form a gap to ensure the fluidity of the insulating oil and avoid affecting the heat dissipation of the transformer.

[0066] Embodiment 2:

[0067] This embodiment provides an oil-immersed transformer pressure ring structure, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0068] like Figure 1 , Figure 3 and Figure 4As shown, in the present embodiment, it is optimized that a card slot 6 is formed internally between the first side pressure plate 101 and the second side pressure plate 102 and the first arc pressure plate 103 and the second arc pressure plate 104, and a card block 7 is provided between the first connecting rod 105 and the second connecting rod 106. There are multiple card blocks 7, which are distributed along the length direction of the first connecting rod 105 and the second connecting rod 106, and the card blocks 7 correspond to the card slot 6.

[0069] In the present technical solution, when in use, the slot 6 formed between the first side pressure plate 101, the second side pressure plate 102, the first arc pressure plate 103 and the second arc pressure plate 104 is clamped on the clamping block 7, so as to position the first side pressure plate 101, the second side pressure plate 102, the first arc pressure plate 103 and the second arc pressure plate 104, so that the first side pressure plate 101, the second side pressure plate 102, the first arc pressure plate 103 and the second arc pressure plate 104 can fit the top surface of the winding more accurately, making it more stable.

[0070] like Figure 5 As shown, in this embodiment, it is optimized that the outer surface of the block 7 is evenly spaced with protrusions 8, and the inner wall of the slot 6 is provided with grooves 9 at positions corresponding to the protrusions 8, and the protrusions 8 and the grooves 9 are engaged with each other.

[0071] In the present technical solution, the card slot 6 is connected to the card block 7, and the protrusion 8 on the outer surface of the card block 7 is embedded in the groove 9 of the card slot 6, so that the groove 9 clamps the protrusion 8, so that the first side pressure plate 101, the second side pressure plate 102, the first arc pressure plate 103 and the second arc pressure plate 104 are more stably fixed on the first connecting rod 105 and the second connecting rod 106.

[0072] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An oil-immersed transformer pressure ring structure, characterized in that: include: A pressure plate body (1), the pressure plate body (1) comprising a first side pressure plate (101) and a second side pressure plate (102), and a first arc pressure plate (103) and a second arc pressure plate (104) arranged between opposite ends of the first side pressure plate (101) and the second side pressure plate (102), the first side pressure plate (101) and the second side pressure plate (102) being arranged on a winding, a first connecting rod (105) and a second connecting rod (106) being arranged between opposite sides of the bottom of the first side pressure plate (101) and the second side pressure plate (102), respectively, the first side pressure plate (101) and the second side pressure plate (102) being supported by the first connecting rod (105) and the second connecting rod (106); and a flow guide assembly (2), which is arranged in the first side pressure plate (101) and the second side pressure plate (102) and is used to improve the insulation effect of the winding; Wherein, the flow guide component (2) comprises: A first guide groove (21) is provided on the bottom surface of the first side pressure plate (101); A second guide groove (22) is provided on the bottom surface of the second side pressure plate (102); An arc-shaped connecting rod (23) is arranged on the first connecting rod (105) and the second connecting rod (106), and a gap (24) is left between the arc-shaped connecting rod (23) and the first connecting rod (105) and the second connecting rod (106).

2. The oil-immersed transformer pressure ring structure according to claim 1, characterized in that: The first side pressing plate (101) and the second side pressing plate (102) as well as the first arc-shaped pressing plate (103) and the second arc-shaped pressing plate (104) use polyester glue as an adhesive.

3. The oil-immersed transformer pressure ring structure according to claim 1, characterized in that: Mounting plates (3) are provided on both sides of the first arc-shaped pressing plate (103) and the second arc-shaped pressing plate (104).

4. The oil-immersed transformer pressure ring structure according to claim 3, characterized in that: Positioning holes (4) are provided in parallel on the mounting plate (3).

5. The oil-immersed transformer pressure ring structure according to claim 4, characterized in that: The inner wall of the positioning hole (4) is provided with an internal thread (5).

6. The oil-immersed transformer pressure ring structure according to claim 1, characterized in that: There are at least three pressing plate bodies (1), and the pressing plate bodies (1) are distributed along the length direction of the first connecting rod (105) and the second connecting rod (106), and two adjacent pressing plate bodies (1) are separated on opposite sides.

7. The oil-immersed transformer pressure ring structure according to claim 1, characterized in that: A card slot (6) is formed internally between the first side pressure plate (101) and the second side pressure plate (102) and between the first arc pressure plate (103) and the second arc pressure plate (104); a card block (7) is arranged between the first connecting rod (105) and the second connecting rod (106); there are a plurality of card blocks (7) which are distributed along the length direction of the first connecting rod (105) and the second connecting rod (106); and the card blocks (7) correspond to the card slot (6).

8. The oil-immersed transformer pressure ring structure according to claim 7, characterized in that: The outer surface of the clamping block (7) is provided with protrusions (8) at even intervals, and the inner wall of the clamping slot (6) is provided with grooves (9) at positions corresponding to the protrusions (8), and the protrusions (8) are engaged with the grooves (9).

Images