On-load tap changer supporting structure and transformer

Abstract

The utility model belongs to the technical field of transformers, and discloses an on-load tap changer supporting structure and a transformer. The on-load tap changer supporting structure comprises supporting beams, a connecting plate and two supports, the two supporting beams are oppositely arranged, the first ends of the supporting beams are used for being connected with a web, one side of the connecting plate is connected with the second ends of the two supporting beams, and the two supports are oppositely arranged and connected to the other side of the connecting plate respectively. The two supports respectively support two sides of an on-load tap changer of the transformer. The supporting beam, the connecting plate and the support are arranged to replace a supporting mode that a semi-arc notch is formed in a whole steel plate, and materials can be saved as much as possible; the two supports are respectively supported on the two sides of the on-load tap changer, other complex auxiliary supporting pieces do not need to be arranged, and the structure is simplified. The two sides of the connecting plate are connected with the supporting beam and the support respectively, the connecting plate plays a role in connection transition between the supporting beam and the support, the overall strength and the bearing capacity are improved, and it is ensured that the on-load tap changer supporting structure is stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a on-load tap-changer support structure and a transformer. Background Technique

[0002] In the power system, transformers and reactors are important electrical equipment, and their interiors include on-load tap-changers.

[0003] In the prior art, there are mainly two ways to support and fix the on-load tap-changer; one is to use a whole steel plate as the support structure and open a semi-circular notch in the middle for positioning the on-load tap-changer, and the on-load tap-changer is fixed to the support structure by bolts; the other is to use a combination of multiple complex support members to jointly support the on-load tap-changer. If the first method is adopted, excessive material consumption will cause material waste; if the second method is adopted, it is difficult to ensure the overall bearing capacity and strength.

[0004] Therefore, it is urgent to provide a on-load tap-changer support structure and a transformer, which can simplify the structure and improve the strength and bearing capacity while saving materials as much as possible to ensure the stability and reliability of the on-load tap-changer support structure. Content of the Utility Model

[0005] The purpose of the utility model is to provide a on-load tap-changer support structure and a transformer, which can simplify the structure and improve the strength and bearing capacity while saving materials as much as possible to ensure the stability and reliability of the on-load tap-changer support structure.

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

[0007] The utility model provides a on-load tap-changer support structure, which includes:

[0008] Support beams, two of which are oppositely arranged and the first ends are used to connect the web of the transformer;

[0009] Connecting plates, one side of the connecting plates is connected to the second ends of the two support beams;

[0010] Brackets, there are two brackets, the two brackets are oppositely arranged and are respectively connected to the other side of the connecting plate, and the two brackets are respectively located on both sides of the on-load tap-changer of the transformer to support the on-load tap-changer.

[0011] As an optional technical solution of the on-load tap-changer support structure, the bracket includes a bottom plate and a support plate connected to the bottom plate, the bottom plate is attached to the connecting plate, and the support plate is used to support the on-load tap-changer.

[0012] As an alternative technical solution for the on-load tap-changer support structure, the cross-sectional area of the support plate decreases in the direction away from the bottom plate.

[0013] As an alternative technical solution for the on-load tap-changer support structure, the support plate includes:

[0014] The first section, connected to the bottom plate;

[0015] The third section, for supporting the on-load tap-changer, both the first section and the third section are in the shape of rectangular plates;

[0016] The second section, with both ends respectively connected to the first section and the third section, and the cross-sectional area of the second section decreases in the direction away from the first section.

[0017] As an alternative technical solution for the on-load tap-changer support structure, the cross-sectional area of the support beam decreases in the direction close to the connecting plate.

[0018] As an alternative technical solution for the on-load tap-changer support structure, each of the brackets is detachably connected to the connecting plate, and the distance between the two brackets is adjustable.

[0019] As an alternative technical solution for the on-load tap-changer support structure, it further includes a first fastener. A first mounting hole is provided on the bracket, and the first fastener passes through the first mounting hole and is threadedly connected to the connecting plate.

[0020] As an alternative technical solution for the on-load tap-changer support structure, the first mounting hole is an oblong hole, and the first fastener can slide within the first mounting hole to adjust the distance between the two brackets.

[0021] As an alternative technical solution for the on-load tap-changer support structure, it further includes a support backing plate, which is arranged between the bracket and the on-load tap-changer.

[0022] The present utility model provides a transformer, which includes a web, an on-load tap-changer, and the on-load tap-changer support structure described above.

[0023] Advantageous effects:

[0024] The present utility model provides a support structure for an on-load tap-changer. The support structure for the on-load tap-changer includes support beams, connection plates, and brackets. There are two relatively arranged support beams, and the first ends thereof are used for connecting the web of a transformer. One side of the connection plate is connected to the second ends of the two support beams. There are two brackets, which are relatively arranged and are respectively connected to the other side of the connection plate. The two brackets are respectively located on both sides of the on-load tap-changer of the transformer to support the on-load tap-changer. By providing the support beams, connection plates, and brackets, instead of the support method of opening semi-circular notches on a whole steel plate, materials can be saved as much as possible; the two brackets respectively support both sides of the on-load tap-changer, and no other complex auxiliary support members need to be provided, simplifying the structure; and both sides of the connection plate are respectively connected to the support beam and the bracket, and the connection plate plays a role of connection and transition between the support beam and the bracket, which can improve the overall strength and load-bearing capacity to ensure the stability and reliability of the support structure for the on-load tap-changer.

[0025] The present utility model provides a transformer, which includes a web, an on-load tap-changer, and a support structure for the on-load tap-changer. By using the above-mentioned support structure for the on-load tap-changer, it can ensure the safe and stable connection between the on-load tap-changer and the web. Brief Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of the support structure for the on-load tap-changer provided by an embodiment of the present utility model;

[0027] Figure 2 is a schematic structural diagram of the bracket provided by an embodiment of the present utility model;

[0028] Figure 3 is a schematic structural diagram of the support pad provided by an embodiment of the present utility model.

[0029] In the figure:

[0030] 1, web; 2, on-load tap-changer; 21, main cylinder; 22, transition section; 23, cover plate;

[0031] 10, bracket; 11, bottom plate; 12, support plate; 121, first section; 122, second section; 123, third section;

[0032] 20, connection plate; 30, support beam; 40, support pad. Detailed Description of the Embodiment

[0033] The following further describes the present utility model in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only parts related to the present utility model are shown in the drawings, rather than all the structures.

[0034] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include that the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the first feature is at a lower horizontal height than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "right", and other orientation or positional relationships are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for differentiation in description and have no special meaning.

[0037] As Figures 1 to 3 shown, this embodiment provides a on-load tap-changer support structure and a transformer. The transformer includes a web 1, a on-load tap-changer 2, and a on-load tap-changer support structure. By using the on-load tap-changer support structure, it can be ensured that the on-load tap-changer 2 and the web 1 are safely and stably connected.

[0038] The on-load tap-changer support structure includes two support beams 30, a connecting plate 20, and two brackets 10. The two support beams 30 are oppositely arranged and the first ends are used to connect the web 1 of the transformer. One side of the connecting plate 20 is connected to the second ends of the two support beams 30. There are two brackets 10, and the two brackets 10 are oppositely arranged and are respectively connected to the other side of the connecting plate 20. The two brackets 10 are respectively located on both sides of the on-load tap-changer 2 of the transformer to support the on-load tap-changer 2.

[0039] By setting the support beam 30, the connecting plate 20 and the bracket 10, instead of the support method of opening semi-circular notches on the whole steel plate, materials can be saved as much as possible; the two brackets 10 are respectively supported on both sides of the on-load tap-changer 2, without the need to set other complex auxiliary support members, which simplifies the structure; and both sides of the connecting plate 20 are respectively connected to the support beam 30 and the bracket 10. The connecting plate 20 plays a role of connecting and transitioning between the support beam 30 and the bracket 10, which can improve the overall strength and bearing capacity to ensure the stability and reliability of the on-load tap-changer support structure.

[0040] Specifically, the transformer has two webs 1 arranged oppositely, and the two support beams 30 are respectively welded to the ends of the two webs 1; the webs 1 are steel plates; the on-load tap-changer 2 includes a cover plate 23 and a cylindrical barrel. The cylindrical barrel includes a main barrel 21 and a transition section 22. The two ends of the transition section 22 are respectively connected to the main barrel 21 and the cover plate 23. The outer diameter of the transition section 22 is smaller than that of the main barrel 21, and the cover plate 23 protrudes radially from the transition section 22 so that the cover plate 23, the main barrel 21 and the transition section 22 enclose a support ring groove. In this embodiment, the two brackets 10 are partially inserted into the support ring groove and respectively support both sides of the on-load tap-changer 2.

[0041] Further, the bracket 10 includes a bottom plate 11 and a support plate 12. The support plate 12 is connected to the bottom plate 11. The bottom plate 11 is adhesively connected to the connecting plate 20. The support plate 12 is used to support the on-load tap-changer 2. By setting the bottom plate 11 and the support plate 12, on the basis that the support plate 12 supports the on-load tap-changer 2, the bottom plate 11 is adhesively connected to the connecting plate 20, which can ensure that there is a large contact area at the connection between the bottom plate 11 and the connecting plate 20, so that the bracket 10 is reliably connected to the connecting plate 20.

[0042] In this embodiment, the support beam 30 is welded to the web 1, and the connecting plate 20 is welded to the support beam 30; the support plate 12 is welded to the bottom plate 11. By setting the support plate 12 welded to the bottom plate 11, the overall structure of the bracket 10 is firm; by setting the support beam 30 welded to the web 1 and welding the connecting plate 20 to the support beam 30, reliable connections can be maintained between the support beam 30 and the web 1, as well as between the connecting plate 20 and the support beam 30. After welding, the components can have good connection performance and are not limited by the shape and size, which helps to improve the structural strength; compared with other connection methods, welding has obvious advantages in terms of firmness and overall performance.

[0043] In this embodiment, the bottom plate 11 is in the shape of a rectangular flat plate, and the support plate 12 is in the shape of a flat plate; the plane where the bottom plate 11 is located is perpendicular to the plane where the support plate 12 is located; both the bottom plate 11 and the support plate 12 are steel plates; the support beam 30 and the connecting plate 20 are also both steel plates.

[0044] Optionally, each bracket 10 is detachably connected to the connecting plate 20, and the distance between the two brackets 10 is adjustable. By setting the detachable connection between the bracket 10 and the connecting plate 20, the distance between the two brackets 10 can be changed by adjusting the setting position of the bracket 10, so as to adapt to on-load tap-changers 2 of different sizes; or the length of the connecting plate 20 can be adjusted according to the size of the on-load tap-changer 2.

[0045] Optionally, the on-load tap-changer support structure further includes a first fastener. The bottom plate 11 is provided with a first mounting hole, and the first fastener passes through the first mounting hole and is threadedly connected to the connecting plate 20. By providing the first fastener, the bracket 10 is detachably fixed to the connecting plate 20, and the structure is simple, stable and reliable.

[0046] In this embodiment, the first mounting hole penetrates the bottom plate 11 in the horizontal direction; two first mounting holes are arranged side by side at intervals in the vertical direction; the first fasteners are arranged in one-to-one correspondence with the first mounting holes, and the first fasteners can be bolts. By providing two first mounting holes, the bottom plate 11 and the connecting plate 20 can be better fixed to prevent the bottom plate 11 from loosening.

[0047] Correspondingly, the connecting plate 20 is provided with second mounting holes, which are arranged in one-to-one correspondence with the first mounting holes, and the second mounting holes are in threaded fit with the first fasteners. In this embodiment, the connecting plate 20 is provided with four second mounting holes, and all four second mounting holes extend in the horizontal direction.

[0048] In this embodiment, the first mounting hole is an oblong hole, and the first fastener can slide in the oblong hole to adjust the distance between the two brackets 10; the length direction of the oblong hole is the horizontal direction. By setting the first mounting hole as an oblong hole, when installing the bracket 10, the first fastener is inserted into the first mounting hole. Before the first fastener is completely locked with the connecting plate 20, when the bracket 10 is moved, the first fastener slides in the first mounting hole, and the relative position of the bracket 10 and the connecting plate 20 will change, thereby adjusting the distance between the two brackets 10 to adapt to on-load tap-changers 2 of different sizes; after adjusting the distance between the two brackets 10, tighten the first fastener to fix the bracket 10 to the connecting plate 20.

[0049] Optionally, the first mounting hole and the second mounting hole can also be both set as oblong holes, and a locking member is used to cooperate with the first fastener. The first fastener passes through the first mounting hole and the second mounting hole in sequence and is threadedly connected to the locking member.

[0050] In other embodiments, the first mounting hole and the second mounting hole can also be both set as round holes. Before assembling the bracket 10 and the connecting plate 20, it is only necessary to pre-drill holes at appropriate positions on the bracket 10 and the connecting plate 20 according to the size of the on-load tap-changer 2.

[0051] In order to save materials as much as possible while ensuring strength, the cross-sectional area of the support plate 12 gradually decreases in the direction away from the bottom plate 11; the support plate 12 includes a first section 121, a second section 122, and a third section 123. The first section 121 is connected to the bottom plate 11; the second section 122 is used to support the on-load tap-changer 2. Both the first section 121 and the third section 123 are rectangular plates; the two ends of the second section 122 are respectively connected to the first section 121 and the third section 123, and the cross-sectional area of the second section 122 gradually decreases in the direction away from the first section 121.

[0052] In this embodiment, both the support beam 30 and the support plate 12 extend in the horizontal direction; the support plate 12 has a support plane for supporting the on-load tap-changer 2. The support plane is located at the top of the support plate 12, and the upper planes of the first section 121, the second section 122, and the third section 123 of the support plate 12 are flush to form the support plane.

[0053] Specifically, the height of the first section 121 in the vertical direction is greater than the height of the third section 123 in the vertical direction; the height of the first section 121 in the vertical direction is approximately three times the height of the third section 123 in the vertical direction. The second section 122 is a right trapezoidal flat plate, that is, the upper base of the right trapezoid is connected to the third section 123, and the lower base of the right trapezoid is connected to the first section 121. By setting the three-section support plate 12 and using the different heights of the three sections in the vertical direction, while ensuring the stable connection between the support plate 12 and the bottom plate 11, the materials used for the support plate 12 are minimized as much as possible.

[0054] Optionally, the cross-sectional area of the support beam 30 gradually decreases in the direction close to the connection plate 20. In this embodiment, the support beam 30 is also a right trapezoidal flat plate; the minimum height of the support beam 30 in the vertical direction is equal to or greater than the minimum height of the support plate 12 in the vertical direction.

[0055] Optionally, the on-load tap-changer support structure further includes a support pad 40, and the support pad 40 is arranged between the third section 123 of the bracket 10 and the on-load tap-changer 2. By arranging the support pad 40 between the bracket 10 and the on-load tap-changer 2, the support pad 40 can be adapted to the on-load tap-changer 2, which is convenient for the installation and disassembly of the on-load tap-changer 2; and according to the sizes of the third section 123 and the on-load tap-changer 2, the thickness of the support pad 40 can be adjusted.

[0056] In this embodiment, the support pad 40 is placed on the top plane of the third section 123, and the width of the support pad 40 is greater than the width of the third section 123; the support pad 40 can be cardboard. By setting the width of the support pad 40 to be greater than the width of the third section 123, the contact area and friction force with the on-load tap-changer 2 can be increased, so that the support pad 40 can be stably placed on the bracket 10, thereby achieving a better supporting effect on the on-load tap-changer 2.

[0057] To connect the third section 123 of the on-load tap-changer 2 and the support 10, a first threaded through-hole penetrating in the vertical direction is provided on the cover plate 23, a second threaded through-hole is provided on the support backing plate 40, and a third threaded through-hole is provided on the third section 123; the on-load tap-changer support structure further includes a second fastener, and the second fastener sequentially passes through the first threaded through-hole and the second threaded through-hole and the end thereof is in threaded cooperation with the third threaded through-hole; the second fastener can be a bolt. In this embodiment, two third threaded through-holes are arranged at intervals in the horizontal direction on the third section 123 of each support 10, and the third threaded through-holes penetrate the third section 123 in the vertical direction; correspondingly, the first threaded through-hole and the second threaded through-hole are both arranged in one-to-one correspondence with the third threaded through-hole.

[0058] The following is the specific installation process of the on-load tap-changer support structure:

[0059] Weld the two support beams 30 to the ends of the two webs 1 respectively, and weld the connecting plate 20 to the two support beams 30; open two second mounting holes on the left and right sides of the connecting plate 20 for mating with the first mounting holes on the bottom plate 11, fix the bottom plate 11 on the connecting plate 20 by using bolts, and weld the support plate 12 to the bottom plate 11; place the support backing plate 40 between the support plate 12 and the cover plate 23 of the on-load tap-changer 2, and connect the support plate 12, the support backing plate 40 and the cover plate 23 by using bolts.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. On-load tap-changer support structure, characterized in that Comprising: Support beams (30), there are two of them arranged oppositely and the first ends are used to connect the web (1) of the transformer; Connection plates (20), one side of the connection plates (20) is connected to the second ends of the two support beams (30); Supports (10), there are two of them, the two supports (10) are arranged oppositely and are respectively connected to the other side of the connection plates (20), and the two supports (10) are respectively located on both sides of the on-load tap-changer (2) of the transformer to support the on-load tap-changer (2).

2. The on-load tap-changer support structure according to claim 1, characterized in that, The support (10) includes a bottom plate (11) and a support plate (12) connected to the bottom plate (11), the bottom plate (11) is adhesively connected to the connection plate (20), and the support plate (12) is used to support the on-load tap-changer (2).

3. The on-load tap-changer support structure according to claim 2, characterized in that, The cross-sectional area of the support plate (12) decreases in the direction away from the bottom plate (11).

4. The on-load tap-changer support structure according to claim 3, characterized in that, The support plate (12) includes: A first section (121), connected to the bottom plate (11); A third section (123), used to support the on-load tap-changer (2), both the first section (121) and the third section (123) are in the shape of rectangular plates; A second section (122), the two ends are respectively connected to the first section (121) and the third section (123), and the cross-sectional area of the second section (122) decreases in the direction away from the first section (121).

5. The on-load tap-changer support structure according to claim 1, characterized in that, The cross-sectional area of the support beam (30) decreases in the direction close to the connection plate (20).

6. The on-load tap-changer support structure according to claim 1, characterized in that, Each support (10) is detachably connected to the connection plate (20), and the distance between the two supports (10) is adjustable.

7. The on-load tap-changer support structure according to claim 6, characterized in that, It further includes a first fastener, the support (10) is provided with a first mounting hole, and the first fastener passes through the first mounting hole and is threadedly connected to the connection plate (20).

8. The on-load tap-changer support structure according to claim 7, characterized in that, The first mounting hole is an oblong hole, and the first fastener can slide in the first mounting hole to adjust the distance between the two supports (10).

9. The on-load tap-changer support structure according to claim 1, characterized in that, It further includes a support backing plate (40), and the support backing plate (40) is arranged between the support (10) and the on-load tap-changer (2).

10. A transformer, characterized in that, Comprising a web (1), an on-load tap-changer (2) and the on-load tap-changer support structure according to any one of claims 1-9.

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