A shielding ring for high-voltage transmission line multi-bundle conductor strain insulator

Abstract

The utility model discloses a kind of shielding rings for high-voltage transmission line multi-bundled conductor strain insulator, belong to electric power fitting technical field.Mainly including the support frame of starting supporting shielding component and transmission line effect, the frame main body of support frame is equipped with multiple interval distribution's ring body support plate along circumferential direction, wire clamp support plate for installing wire clamp is equipped between two ring body support plates;Transmission line is taken by wire clamp;Shielding component includes shielding ring body and the ring body support leg for supporting shielding ring body, ring body support leg and ring body support plate are fixedly connected with electric conductivity.This utility model breaks through the installation limit of traditional shielding ring, without relying on joint plate structure, can flexibly cover the concentrated area of wire electric field, unique in conception, especially suitable for compact line, old line reconstruction and other special application scenarios.

Description

Technical Field

[0001] This utility model belongs to the field of power fittings technology. Specifically, it relates to a tension-resistant shielding ring for multi-split conductors of high-voltage transmission lines that adopts an independent installation mode, breaks through installation limitations, flexibly covers areas with concentrated electric fields, has a simple and unique structural design, and is easy to operate at high altitudes. Background Technology

[0002] Tension strings are primarily used to withstand the tension of transmission lines, securing the conductors to the towers. Shielding rings, on the other hand, are used to reduce corona discharge and electromagnetic interference on the tension strings. When the voltage level of the transmission line is high, electric field concentration can easily occur on the surfaces of the fittings and insulators on the tension strings, leading to corona discharge. This not only wastes electrical energy but also generates electromagnetic interference, affecting surrounding communication equipment. Shielding rings, through their shape and position, make the electric field distribution around the tension string more uniform, reducing the electric field strength on the surfaces of the fittings and insulators, thereby reducing the possibility of corona discharge.

[0003] Chinese patent publication number CN201549281U discloses a double-strand tension insulator string for ultra-high voltage transmission lines, and specifically discloses the following technical solution: It includes hanging point hardware, insulators, and two U-shaped hanging rings that are hung together. The left and right ends of the two U-shaped hanging rings are respectively hinged to the hanging point hardware and one end of the traction plate. The other end of the traction plate is hinged to one end of a triangular connecting plate. Two ball-head hanging rings are hinged to the other end of the triangular connecting plate. Each ball-head hanging ring has an insulator hinged to its other end. The other end of each insulator is connected to a hardware string of the same structure. The other end of the cup-head hanging plate connected to the insulator is fixed to a four-eye connecting plate. The four-eye connecting plate is then connected to a two-transformer six-connecting plate. Six tie rods of different lengths are connected to six holes arranged in a regular hexagon on the two-transformer six-connecting plate via right-angle hanging plates. The other ends of the six tie rods are connected to six sub-conductors via two U-shaped hanging rings. An equalizing plate is also fixed on the four-eye connecting plate, and a shielding ring is also fixed on the two-transformer six-connecting plate.

[0004] Therefore, the shielding ring needs to be installed on the connecting plate of the tension string. Traditional designs require connecting plates and other structures to achieve the installation of the shielding ring. However, in special application scenarios such as compact high-voltage lines, tension strings often adopt a connecting plate-less design to reduce corridor footprint costs. Similarly, when upgrading old lines, lightweight connecting plate-less tension string structures are required to reduce the amount of tower replacement work. Due to the lack of a connecting plate as a key installation carrier, traditional shielding rings cannot be deployed in these scenarios. This technical limitation restricts insulation optimization and corona control in such special scenarios, becoming an engineering problem that urgently needs to be solved. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a tension-resistant shielding ring for multi-split conductors in high-voltage transmission lines. This ring features an independent installation mode, overcomes installation limitations, provides flexible coverage of concentrated electric field areas, has a simple and unique structural design, and is easy to operate at high altitudes.

[0006] This utility model is achieved through the following technical solution:

[0007] A shielding ring for tension stringing of multi-split conductors in high-voltage transmission lines includes a support frame that supports the shielding assembly and the transmission line. The main body of the support frame has multiple spaced ring support plates along the circumferential direction, and a clamp support plate for installing conductor clamps is provided between two ring support plates. The transmission line is clamped by the conductor clamps. The shielding assembly includes a shielding ring and ring legs for supporting the shielding ring. The ring legs are electrically fixedly connected to the ring support plates.

[0008] Preferably, the support frame is ring-shaped, and a cross-shaped reinforcing rib is provided inside the support frame.

[0009] Preferably, the frame body, ring support plate, wire clamp support plate, and reinforcing ribs are an integral structure, manufactured by forging or casting.

[0010] Preferably, the ring support leg is curved, one end of the ring support leg is electrically fixed to the shielding ring by welding, and the other end of the ring support leg is electrically fixed to the ring support plate by bolt fasteners.

[0011] Preferably, the wire clamps are evenly and regularly distributed along the circumference of the support frame.

[0012] Preferably, the wire clamp is electrically fixed to the clamp support plate using bolt fasteners.

[0013] Preferably, the wire clamp includes a clamp body with a slot-shaped end, the end of the clamp body is fixedly connected to the clamp support plate by straddling, the clamp body is movably connected to the clamp cover, and rubber pads are fixedly provided on the inner walls of both the clamp body and the clamp cover.

[0014] Preferably, both rubber pads are fixed to the clamp body and the clamp cover respectively by adhesive bonding.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention breaks through the limitations of traditional shielding ring installation, adopts an independent installation mode, and does not rely on the connecting plate structure, thus completely solving the technical problem that shielding rings cannot be installed on tension strings without connecting plates.

[0017] This invention can flexibly cover areas with concentrated electric fields on conductors according to actual installation needs, effectively improving the electric field distribution on the surface of insulator strings and fittings, and significantly reducing corona loss and radio interference levels.

[0018] This utility model has a unique concept, a simple and reasonable structural design, requires fewer installations, and is easy to operate at heights.

[0019] This utility model can meet the installation requirements of shielding rings for transmission lines of different voltage levels, and has a wide range of applications, especially suitable for special application scenarios such as compact lines and renovation of old lines. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 .

[0021] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 .

[0022] Figure 3 This is a utility model Figure 2 Enlarged view of a portion of the image.

[0023] Figure 4 This is a schematic diagram of the side structure of the wire clamp body of this utility model.

[0024] Figure 5 This is a schematic diagram of the support frame structure of this utility model.

[0025] Figure 6 This is a schematic diagram of the front view structure of the shielding component of this utility model.

[0026] Figure 7 This is a schematic diagram of the side structure of the shielding component of this utility model.

[0027] In the diagram: 1. Support frame; 11. Frame body; 12. Ring support plate; 13. Wire clamp support plate; 14. Reinforcing rib; 2. Wire clamp; 21. Wire clamp body; 22. Wire clamp flip cover; 23. Rubber pad; 3. Shielding assembly; 31. Shielding ring; 32. Ring support leg; 4. Power transmission line. Detailed Implementation

[0028] To enable readers to better understand the design intent of this utility model, the technical solution described below is further described in conjunction with embodiments. It should be noted that directional terms that may appear in the following paragraphs, including but not limited to "up," "down," "left," "right," "front," and "back," are based on the visual orientation shown in the accompanying drawings and should not be considered as limitations on the scope of protection or technical solution of this utility model. Their purpose is solely to facilitate a better understanding of the technical solution described in this utility model by those skilled in the art.

[0029] In this specification, 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Example 1

[0031] like Figures 1 to 7 As shown, a shielding ring for tension stringing of multi-split conductors in high-voltage transmission lines includes a support frame 1 that supports a shielding assembly 3 and a transmission line 4. The frame body 11 of the support frame 1 has multiple spaced-apart ring support plates 12 along its circumferential direction. A clamp support plate 13 for mounting conductor clamps 2 is provided between two ring support plates 12. The transmission line 4 is clamped by the conductor clamps 2. The shielding assembly 3 includes a shielding ring 31 and ring support legs 32 for supporting the shielding ring 31. The ring support legs 32 are electrically fixedly connected to the ring support plates 12.

[0032] In this embodiment, the installation position is located at the conductor end of the tension string, typically maintaining a distance of 1-2 meters from the tension string. The specific distance needs to be determined according to the actual engineering design requirements. The conductor clamp 2 can be a conventional conductor clamp used on spacers. The conductor clamp 2 is fixedly connected to the support frame 1 via the clamp support plate 13. The ring support plate 12 of the support frame 1 is then fixedly connected to the shielding assembly 3. Therefore, after the conductor clamp 2 is fixedly connected to the transmission line 4, the entire shielding ring can be smoothly installed near the tension string.

[0033] This embodiment breaks through the limitations of traditional shielding ring installation, adopts an independent installation mode, and does not rely on the connecting plate structure, thus completely solving the technical problem that shielding rings cannot be installed on tension strings without connecting plates.

[0034] This embodiment can flexibly cover the area where the conductor's electric field is concentrated according to actual installation needs, effectively improving the electric field distribution on the surface of the insulator string and fittings, and significantly reducing corona loss and radio interference levels.

[0035] This embodiment features a unique concept, a simple and reasonable structural design, requires fewer components, and is easy to operate at heights. The conductor clamp 2 can be the same as the conductor clamp 2 used on the spacer bar, making the entire shielding ring easy to manufacture and inexpensive.

[0036] This embodiment can meet the installation requirements of shielding rings for transmission lines of different voltage levels, and has a wide range of applications, especially suitable for special application scenarios such as compact lines and renovation of old lines.

[0037] Example 2

[0038] Based on Embodiment 1, this embodiment continues to describe in detail the technical features involved therein and the functions and roles of these technical features in this utility model, so as to help those skilled in the art to fully understand the technical solution of this utility model and reproduce it.

[0039] like Figures 1 to 7 As shown, a tension-resistant shielding ring for multi-split conductors in high-voltage transmission lines includes a support frame 1 that supports the shielding assembly 3 and the transmission line 4. The support frame 1 is ring-shaped, and a cross-shaped reinforcing rib 14 is provided inside the support frame 1. The reinforcing rib 14 enhances mechanical strength. The frame body 11 of the support frame 1 has multiple spaced-apart ring support plates 12 along the circumferential direction, and a clamp support plate 13 for installing the conductor clamp 2 is provided between two ring support plates 12. In this embodiment, the frame body 11, ring support plates 12, clamp support plates 13, and reinforcing ribs 14 are an integral structure, manufactured using existing forging or casting processes. The integral design of the frame body 11, ring support plates 12, clamp support plates 13, and reinforcing ribs 14 facilitates manufacturing, and the integral structure provides stronger mechanical strength, greater durability, and stability. The transmission line 4 is clamped by the conductor clamp 2.

[0040] The number of wire clamps 2 in this embodiment is determined according to actual engineering requirements, and can be two-split, four-split, six-split, eight-split, ten-split, etc. Figures 1-7 What is shown is a very cracked conductor, among which Figure 1 , Figure 2 In the diagram, A1-A5 and B1-B5 represent ten transmission lines 4, and ten conductor clamps 2 are evenly and regularly distributed along the circumference of the support frame 1. The conductor clamps 2 are electrically fixed to the clamp support plate 13 using bolts. Figure 4As shown, the wire clamp 2 in this embodiment includes a clamp body 21 with a slot-shaped end. The end of the clamp body 21 adopts a straddling design and is fixedly connected to the clamp support plate 13 using bolt fasteners. The clamp body 21 is movably connected to the clamp cover 22. Rubber pads 23 are fixedly provided on the inner walls of both the clamp body 21 and the clamp cover 22. The two rubber pads 23 are respectively fixed to the clamp body 21 and the clamp cover 22 by adhesive. Similar to the spacer bar wire clamp, the transmission line 4 is accommodated between the two rubber pads 23. After the clamp cover 22 is combined with the clamp body 21, the transmission line 4 is locked in place using a locking pin.

[0041] In this embodiment, the shielding assembly 3 includes a shielding ring 31 and ring legs 32 for supporting the shielding ring 31. The ring legs 32 are electrically fixedly connected to the ring support plate 12. In this embodiment, the conductive connection means maintaining electrical continuity based on a mechanical connection. The ring legs 32 are curved, and one end of the ring legs 32 is electrically fixedly connected to the shielding ring 31 by welding, while the other end of the ring legs 32 is electrically fixedly connected to the ring support plate 12 by bolts.

[0042] This embodiment breaks through the limitations of traditional shielding ring installation, adopts an independent installation mode, and does not rely on the connecting plate structure, thus completely solving the technical problem that shielding rings cannot be installed on tension strings without connecting plates.

[0043] This embodiment can flexibly cover the area where the conductor's electric field is concentrated according to actual installation needs, effectively improving the electric field distribution on the surface of the insulator string and fittings, and significantly reducing corona loss and radio interference levels.

[0044] This embodiment has a unique concept, a simple and reasonable structural design, requires fewer installations, and is easy to operate at heights.

[0045] This embodiment can meet the installation requirements of shielding rings for transmission lines of different voltage levels, and has a wide range of applications, especially suitable for special application scenarios such as compact lines and renovation of old lines.

[0046] In summary, this is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent variations and modifications made in accordance with the shape, structure, features and spirit of the claims of the present utility model should be included within the scope of the claims of the present utility model.

Claims

1. A shielding ring for tension stringing of multi-split conductors in high-voltage transmission lines, characterized in that: The support frame (1) includes a support frame (1) that supports the shielding assembly (3) and the power transmission line (4). The frame body (11) of the support frame (1) is provided with a plurality of spaced annular support plates (12) in the circumferential direction. A clamp support plate (13) for installing wire clamps (2) is provided between two annular support plates (12). The power transmission line (4) is clamped by the wire clamps (2). The shielding assembly (3) includes a shielding ring (31) and annular support legs (32) for supporting the shielding ring (31). The annular support legs (32) are electrically fixedly connected to the annular support plates (12).

2. The shielding ring for tension stringing of multi-split conductors in high-voltage transmission lines according to claim 1, characterized in that: The support frame (1) is ring-shaped, and a cross-shaped reinforcing rib (14) is provided inside the support frame (1).

3. A shielding ring for tension stringing of multi-split conductors in high-voltage transmission lines according to claim 2, characterized in that: The frame body (11), ring support plate (12), wire clamp support plate (13), and reinforcing rib (14) are an integral structure, made by forging or casting.

4. A shielding ring for tension stringing of multi-split conductors in high-voltage transmission lines according to claim 1, characterized in that: The ring support leg (32) is curved. One end of the ring support leg (32) is electrically fixed to the shielding ring (31) by welding, and the other end of the ring support leg (32) is electrically fixed to the ring support plate (12) by bolt fasteners.

5. A shielding ring for tension stringing of multi-split conductors in high-voltage transmission lines according to claim 1, characterized in that: The wire clamps (2) are evenly distributed along the circumference of the support frame (1).

6. A shielding ring for tension stringing of multi-split conductors in high-voltage transmission lines according to claim 1 or 5, characterized in that: The wire clamp (2) is electrically fixed to the clamp support plate (13) by bolt fasteners.

7. A shielding ring for tension stringing of multi-split conductors in high-voltage transmission lines according to claim 6, characterized in that: The wire clamp (2) includes a clamp body (21) with a slot-shaped end. The end of the clamp body (21) is fixedly connected to the clamp support plate (13) in a straddle manner. The clamp body (21) is movably connected to the clamp cover (22). Rubber pads (23) are fixedly provided on the inner walls of both the clamp body (21) and the clamp cover (22).

8. A shielding ring for tension stringing of multi-split conductors in high-voltage transmission lines according to claim 7, characterized in that: Both rubber pads (23) are fixed to the clamp body (21) and the clamp cover (22) respectively by adhesive.

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