A sleeve

Abstract

The utility model belongs to high -voltage switch equipment technical field discloses a sleeve, and sleeve includes equalizing ring, center conductor and insulating sleeve, and equalizing ring includes upper ring, support ring, lower ring and first flange, and support ring supports between upper ring and lower ring, and upper ring has first hollow chamber, and lower ring has second hollow chamber, and support ring has third hollow chamber, and third hollow chamber, first hollow chamber and second hollow chamber are linked together, and first flange is located in the inner peripheral wall of support ring, and upper ring is provided with first heat dissipation hole that links together first hollow chamber, and / or lower ring is provided with second heat dissipation hole that links together second hollow chamber, and the first end of center conductor is fixedly connected with first flange, and the insulating sleeve is sleeved on the outside of center conductor, and the first end of insulating sleeve is fixedly connected with the first end of center conductor. The sleeve provided by the utility model can realize the effective cooling of equalizing ring, ensure the reliable heat dissipation capacity of equalizing ring, and ensure the reliable and stable operation of sleeve.

Description

Technical Field

[0001] This utility model relates to the field of high voltage switchgear technology, and in particular to a bushing. Background Technology

[0002] In high-voltage power transmission and transformation systems, bushings serve as a key component, undertaking a dual core function: on the one hand, they are the electrical connection hub between the internal conductive circuit of high-voltage switchgear and the external overhead line fittings; on the other hand, they constitute the main input / output ports of the equipment and are the core conductive channels for carrying high-power electrical energy transmission.

[0003] Existing high-voltage equipment bushings suffer from severe overheating at the top equalizing ring under high current conditions. This is a key factor contributing to material aging, decreased sealing performance, and ultimately, gas leakage risks and environmental concerns. Therefore, there is an urgent need to develop new bushing structures with excellent heat dissipation performance and long-term thermal stability to simultaneously ensure equipment operational reliability, long service life, and environmental friendliness. Utility Model Content

[0004] The purpose of this invention is to provide a sleeve that can effectively cool the equalizing ring, ensure the reliable heat dissipation capacity of the equalizing ring, and ensure the reliable and stable operation of the sleeve.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A sleeve, comprising:

[0007] An equalizing ring includes an upper ring, a support ring, a lower ring, and a first flange. The support ring is supported between the upper ring and the lower ring. The upper ring has a first hollow cavity, the lower ring has a second hollow cavity, and the support ring has a third hollow cavity. The third hollow cavity, the first hollow cavity, and the second hollow cavity are connected. The first flange is disposed on the inner peripheral wall of the support ring. The upper ring has a first heat dissipation hole communicating with the first hollow cavity, and / or the lower ring has a second heat dissipation hole communicating with the second hollow cavity.

[0008] A center conductor, the first end of which is fixedly connected to the first flange;

[0009] An insulating sleeve is fitted over the outside of the central conductor, and the first end of the insulating sleeve is fixedly connected to the first end of the central conductor.

[0010] Preferably, the first heat dissipation holes are spaced apart on the surface of the upper ring facing the support ring, and the second heat dissipation holes are spaced apart on the surface of the lower ring facing away from the support ring.

[0011] Preferably, the first flange has a plurality of third heat dissipation holes spaced apart along its circumference.

[0012] Preferably, the third heat dissipation hole is shaped as an elongated strip extending radially along the first flange, and the plurality of third heat dissipation holes are evenly spaced along the circumference of the first flange.

[0013] Preferably, the first end of the central conductor is provided with a second flange, the first end of the insulating sleeve is provided with a third flange, the second flange is supported on the third flange, the first flange is supported on the second flange, and the first flange, the second flange, and the third flange are fixedly connected by a first fastener.

[0014] Preferably, the first fastener includes a first bolt and a first nut, the first flange has a first hole, the second flange has a second hole, the third flange has a third hole, and the first bolt passes through the first hole, the second hole and the third hole and is threadedly connected to the first nut.

[0015] Preferably, the second flange is provided with a terminal block, which is located inside the upper ring and the lower ring, and the terminal block is provided with a plurality of wiring holes.

[0016] Preferably, the device further includes a shielding sleeve, which is placed inside the insulating sleeve and fitted onto the second end of the central conductor. The second end of the insulating sleeve is provided with a fourth flange, and the shielding sleeve is provided with a fifth flange. The fourth flange is supported on the fifth flange, and the fourth flange and the fifth flange are fixedly connected by a second fastener.

[0017] Preferably, the diameter of the first end of the insulating sleeve is larger than the diameter of the second end, and the outer peripheral wall of the insulating sleeve is provided with an umbrella-shaped insulator.

[0018] Preferably, the interior of the central conductor, the interior of the insulating sleeve, and the interior of the shielding sleeve are all filled with a gaseous insulating medium.

[0019] Beneficial effects:

[0020] The bushing provided by this utility model has an upper ring with a first hollow cavity, a lower ring with a second hollow cavity, and a support ring with a third hollow cavity. The first hollow cavity is connected to the second hollow cavity through the third hollow cavity. The upper ring has a first heat dissipation hole connecting to the first hollow cavity, and the lower ring has a second heat dissipation hole connecting to the second hollow cavity. Through the first and second heat dissipation holes, cold air from the external environment exchanges with the hot air inside the first, second, and third hollow cavities via convection, thereby forming a natural convection channel between the hot air inside the pressure equalizing ring and the cold air from the external environment. This effectively cools the pressure equalizing ring, ensures reliable heat dissipation capacity of the pressure equalizing ring, and ensures reliable and stable operation of the bushing. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the sleeve provided by this utility model;

[0022] Figure 2 This is a cross-sectional view of the pressure equalizing ring provided by this utility model;

[0023] Figure 3 This is a cross-sectional view of the shielding sleeve provided by this utility model;

[0024] Figure 4 This is a cross-sectional view of the structure of the central conductor provided by this utility model;

[0025] Figure 5 This is a cross-sectional view of the insulating sleeve provided by this utility model.

[0026] In the picture:

[0027] 1. Equalizing ring; 11. Upper ring; 111. First hollow cavity; 112. First heat dissipation hole; 12. Support ring; 121. Third hollow cavity; 1211. First connecting hole; 1212. Second connecting hole; 13. Lower ring; 131. Second hollow cavity; 132. Second heat dissipation hole; 14. First flange; 141. Third heat dissipation hole; 142. First hole;

[0028] 2. Center conductor; 21. Second flange; 211. Second hole; 22. Terminal block; 221. Wiring hole;

[0029] 3. Insulating sleeve; 31. Third flange; 311. Third hole; 32. Fourth flange; 321. Fourth hole; 33. Umbrella-shaped insulator;

[0030] 4. Shielding sleeve; 41. Fifth flange; 411. Fifth hole;

[0031] 51. First fastener; 511. First bolt; 512. First nut; 52. Second fastener; 521. Second bolt. Detailed Implementation

[0032] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0036] This embodiment provides a sleeve, as shown in the reference. Figures 1 to 5As shown, the bushing includes an equalizing ring 1, a central conductor 2, and an insulating sleeve 3. The equalizing ring 1 includes an upper ring 11, a support ring 12, a lower ring 13, and a first flange 14. The support ring 12 is supported between the upper ring 11 and the lower ring 13. The upper ring 11 has a first hollow cavity 111, the lower ring 13 has a second hollow cavity 131, and the support ring 12 has a third hollow cavity 121. The third hollow cavity 121, the first hollow cavity 111, and the second hollow cavity 131 are connected. The first flange 14 is located on the inner circumferential wall of the support ring 12. The upper ring 11 has a first heat dissipation hole 112 connecting to the first hollow cavity 111, and / or the lower ring 13 has a second heat dissipation hole 132 connecting to the second hollow cavity 131. The first end of the central conductor 2 is fixedly connected to the first flange 14. The insulating sleeve 3 is sleeved on the outside of the central conductor 2, and the first end of the insulating sleeve 3 is fixedly connected to the first end of the central conductor 2.

[0037] In this embodiment, the upper ring 11 of the equalizing ring 1 has a first hollow cavity 111, the lower ring 13 has a second hollow cavity 131, and the support ring 12 has a third hollow cavity 121. The first hollow cavity 111 is connected to the second hollow cavity 131 through the third hollow cavity 121. The upper ring 11 has a first heat dissipation hole 112 connecting to the first hollow cavity 111, and the lower ring 13 has a second heat dissipation hole 132 connecting to the second hollow cavity 131. Through the first heat dissipation hole 112 and the second heat dissipation hole 132, the cold air from the external environment is convectively exchanged with the hot air inside the first hollow cavity 111, the second hollow cavity 131, and the third hollow cavity 121, thereby forming a natural convection channel between the hot air inside the equalizing ring 1 and the cold air from the external environment. This effectively cools the equalizing ring 1, ensures reliable heat dissipation capacity of the equalizing ring 1, and ensures reliable and stable operation of the bushing.

[0038] In this embodiment, multiple first heat dissipation holes 112 are spaced apart on the surface of the upper ring 11 facing the support ring 12, and multiple second heat dissipation holes 132 are spaced apart on the surface of the lower ring 13 facing away from the support ring 12. Specifically, the multiple first heat dissipation holes 112 are evenly distributed along the axial direction of the upper ring 11, and the multiple second heat dissipation holes 132 are evenly distributed along the axial direction of the lower ring 13. This arrangement can further improve the air convection capacity between the external environment and the first hollow cavity 111, the second hollow cavity 131, and the third hollow cavity 121, ensuring reliable and effective heat dissipation of the equalizing ring 1 and ensuring stable operation of the sleeve.

[0039] In this embodiment, the equalizing ring 1 is made of aluminum, that is, the upper ring 11, the support ring 12, and the lower ring 13 are all made of aluminum, which is easy to manufacture and has reliable heat exchange capability.

[0040] In this embodiment, the insulating sleeve 3 can be made of any material, including but not limited to ceramic insulating sleeves, composite insulating sleeves, etc.

[0041] In this embodiment, the upper end of the support ring 12 is welded to the lower surface of the upper ring 11, and the lower end of the support ring 12 is welded to the upper surface of the lower ring 13. Specifically, the lower surface of the upper ring 11 has a first connecting hole 1211, and the third hollow cavity 121 is connected to the first hollow cavity 111 through the first connecting hole 1211; the upper surface of the lower ring 13 has a second connecting hole 1212, and the third hollow cavity 121 is connected to the second hollow cavity 131 through the second connecting hole 1212.

[0042] Furthermore, the first flange 14 is provided with a plurality of third heat dissipation holes 141 spaced apart along its circumference. Specifically, the arrangement of the third heat dissipation holes 141 allows air to flow through the first flange 14, ensuring heat dissipation. Furthermore, the third heat dissipation holes 141 are elongated strips extending radially along the first flange 14, and the plurality of third heat dissipation holes 141 are evenly spaced along the circumference of the first flange 14. This arrangement ensures that the airflow through the first flange 14 is uniform and stable, significantly increases the heat dissipation surface area, and forms additional gas flow paths, thereby enhancing the heat dissipation effect.

[0043] In this embodiment, the first end of the central conductor 2 is provided with a second flange 21, and the first end of the insulating sleeve 3 is provided with a third flange 31. The second flange 21 is supported on the third flange 31, and the first flange 14 is supported on the second flange 21. The first flange 14, the second flange 21, and the third flange 31 are fixedly connected by a first fixing member 51. Specifically, the first fixing member 51 is used to fix the equalizing ring 1, the central conductor 2, and the insulating sleeve 3. Specifically, in this embodiment, the first fixing member 51 includes a first bolt 511 and a first nut 512. The first flange 14 has a first hole 142, the second flange 21 has a second hole 211, and the third flange 31 has a third hole 311. The first bolt 511 passes through the first hole 142, the second hole 211, and the third hole 311 and is threadedly connected to the first nut 512. In this embodiment, a plurality of first holes 142, second holes 211, third holes 311, first bolts 511 and first nuts 512 are provided in a one-to-one correspondence. The plurality of first holes 142 are distributed at intervals along the circumference of the first flange 14, the plurality of second holes 211 are distributed at intervals along the circumference of the second flange 21, and the plurality of third holes 311 are distributed at intervals along the circumference of the third flange 31.

[0044] In some other alternative embodiments, the third hole 311 can also be configured as a threaded hole, whereby the first bolt 511 is threaded through the first hole 142, the second hole 211 and the third hole 311.

[0045] In this embodiment, the second flange 21 is provided with a terminal block 22, which is located inside the upper ring 11 and the lower ring 13. The terminal block 22 has multiple wiring holes 221. Specifically, the multiple wiring holes 221 are distributed in a matrix on the terminal block 22. The wiring holes 221 are used to connect external power transmission and transformation line fittings.

[0046] In this embodiment, the sleeve further includes a shielding sleeve 4, which is placed inside the insulating sleeve 3 and fitted onto the second end of the central conductor 2. The second end of the insulating sleeve 3 is provided with a fourth flange 32, and the shielding sleeve 4 is provided with a fifth flange 41. The fourth flange 32 is supported on the fifth flange 41, and the fourth flange 32 and the fifth flange 41 are fixedly connected by a second fixing member 52. Specifically, the second end of the central conductor 2 passes through the fifth flange 41. The fixed connection between the insulating sleeve 3 and the shielding sleeve 4 is achieved by the second fixing member 52. Specifically, in this embodiment, the second fixing member 52 includes a second bolt 521. The fourth flange 32 has a fourth hole 321, and the fifth flange 41 has a fifth hole 411. The second bolt 521 passes through the fourth hole 321 and is threadedly connected to the fifth hole 411. In this embodiment, multiple fourth holes 321, fifth holes 411, and second bolts 521 are provided in a one-to-one correspondence. Multiple fourth holes 321 are distributed at intervals along the circumference of the fourth flange 32, and multiple fifth holes 411 are distributed at intervals along the circumference of the fifth flange 41.

[0047] In some other alternative embodiments, the second fastener 52 further includes a second nut (not shown), the third hole 311 is not a screw hole, and the second bolt 521 passes through the fourth hole 321 and the fifth hole 411 and is threadedly connected to the second nut.

[0048] In this embodiment, the diameter of the first end of the insulating sleeve 3 is larger than the diameter of the second end. This configuration effectively lowers the center of gravity of the insulating sleeve 3, ensuring stable and reliable support for the central conductor 2 and the equalizing ring 1. The outer peripheral wall of the insulating sleeve 3 is provided with umbrella-shaped insulators 33, effectively ensuring insulation performance.

[0049] In this embodiment, the interiors of the central conductor 2, the insulating sleeve 3, and the shielding sleeve 4 are all filled with a gaseous insulating medium. Exemplarily, the gaseous insulating medium is specifically an insulating mixture. The insulating mixture is a mixture of SF6 and N2, with a volume ratio of SF6 to N2 of 3:7 or 2:8. Filling the sleeve with an insulating mixture can significantly reduce the amount of greenhouse gas SF6 used, thus reducing environmental harm.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A sleeve, characterized in that include: The equalizing ring (1) includes an upper ring (11), a support ring (12), a lower ring (13), and a first flange (14). The support ring (12) is supported between the upper ring (11) and the lower ring (13). The upper ring (11) has a first hollow cavity (111), the lower ring (13) has a second hollow cavity (131), and the support ring (12) has a third hollow cavity (121). The third hollow cavity (121), the first hollow cavity (111), and the second hollow cavity (131) are connected. The first flange (14) is disposed on the inner peripheral wall of the support ring (12). The upper ring (11) has a first heat dissipation hole (112) that connects to the first hollow cavity (111), and / or the lower ring (13) has a second heat dissipation hole (132) that connects to the second hollow cavity (131). The center conductor (2) is fixedly connected at its first end to the first flange (14); An insulating sleeve (3) is fitted on the outside of the central conductor (2), and the first end of the insulating sleeve (3) is fixedly connected to the first end of the central conductor (2).

2. The sleeve of claim 1, wherein The first heat dissipation hole (112) is provided in a plurality of spaces on the surface of the upper ring (11) facing the support ring (12), and the second heat dissipation hole (132) is provided in a plurality of spaces on the surface of the lower ring (13) facing away from the support ring (12).

3. The sleeve according to claim 1, characterized in that, The first flange (14) has a plurality of third heat dissipation holes (141) spaced apart along its circumference.

4. The sleeve according to claim 3, characterized in that, The third heat dissipation hole (141) is configured to be a long strip extending radially along the first flange (14), and the plurality of the third heat dissipation holes (141) are evenly spaced along the circumference of the first flange (14).

5. The sleeve according to claim 1, characterized in that, The first end of the central conductor (2) is provided with a second flange (21), and the first end of the insulating sleeve (3) is provided with a third flange (31). The second flange (21) is supported on the third flange (31), and the first flange (14) is supported on the second flange (21). The first flange (14), the second flange (21), and the third flange (31) are fixedly connected by a first fastener (51).

6. The sleeve according to claim 5, characterized in that, The first fastener (51) includes a first bolt (511) and a first nut (512). The first flange (14) has a first hole (142), the second flange (21) has a second hole (211), and the third flange (31) has a third hole (311). The first bolt (511) passes through the first hole (142), the second hole (211), and the third hole (311) and is threadedly connected to the first nut (512).

7. The sleeve according to claim 5, characterized in that, The second flange (21) is provided with a terminal block (22), which is located inside the upper ring (11) and the lower ring (13). The terminal block (22) is provided with multiple wiring holes (221).

8. The sleeve according to claim 1, characterized in that, It also includes a shielding sleeve (4), which is placed inside the insulating sleeve (3) and sleeved on the second end of the center conductor (2). The second end of the insulating sleeve (3) is provided with a fourth flange (32), and the shielding sleeve (4) is provided with a fifth flange (41). The fourth flange (32) is supported on the fifth flange (41), and the fourth flange (32) and the fifth flange (41) are fixedly connected by a second fastener (52).

9. The sleeve according to claim 1, characterized in that, The diameter of the first end of the insulating sleeve (3) is larger than the diameter of the second end, and the outer peripheral wall of the insulating sleeve (3) is provided with an umbrella-shaped insulator (33).

10. The sleeve according to claim 8, characterized in that, The interior of the central conductor (2), the interior of the insulating sleeve (3), and the interior of the shielding sleeve (4) are all filled with a gaseous insulating medium.

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