High-voltage direct-current strut optical fiber composite insulator

Abstract

The utility model discloses a high-voltage direct-current strut optical fiber composite insulator, which comprises an upper flange fitting, a large-diameter slotted core rod, a silicon rubber umbrella cover, a lower flange fitting, an optical fiber protection joint, an optical fiber protection tube and an optical fiber, the upper flange fitting and the lower flange fitting are respectively assembled with the large-diameter slotted core rod in a crimping or cementing manner; a spiral groove is formed in the surface of the large-diameter slotted core rod, straight holes are formed in the two ends of the large-diameter slotted core rod, inclined holes communicated with the bottoms of the straight holes are formed in the ends of the spiral groove, and the spiral groove, the inclined holes and the straight holes form an optical fiber channel; the optical fiber is integrated in an optical fiber channel in the insulator. The device is light in weight, compact in structure, convenient to install, easy to operate, safe, reliable, energy-saving, environment-friendly, high in applicability and good in using effect.

Description

Technical Field

[0001] This utility model relates to a DC support fiber optic composite insulator, belonging to the field of high voltage DC transmission and transformation insulators. Background Technology

[0002] The government is increasingly investing in the development and construction of smart grids, aiming to improve the operational efficiency of power systems and achieve real-time monitoring of grid operation status and equipment. With the continuous increase in transmission voltage levels and the growing number of ultra-high voltage (UHV) transmission and transformation projects in my country, the demand for high-voltage direct current (HVDC) transmission and transformation equipment is also gradually increasing. Currently, most fiber optic insulators used in smart grid projects are suspension insulators. Due to mechanical and electrical performance limitations, the development of fiber optic composite insulators for support structures in HVDC transmission above ±400kV has remained a technological gap. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a high-voltage DC support fiber optic composite insulator to address the deficiencies of the existing technology, for use in high-voltage DC transmission fields above ±400kV.

[0004] To solve this technical problem, this utility model provides a high-voltage DC support fiber optic composite insulator, comprising an upper flange fitting, a large-diameter slotted core rod, a silicone rubber shed, a lower flange fitting, a fiber optic protective connector, a fiber optic protective tube, and an optical fiber. The large-diameter slotted core rod is encased within the silicone rubber shed. The upper and lower flange fittings are assembled to the large-diameter slotted core rod by crimping or adhesive bonding, respectively. The surface of the large-diameter slotted core rod is machined with a spiral groove, and straight holes are machined at both ends. An oblique hole is opened at the end of the spiral groove, connecting to the bottom of the straight hole. The spiral groove, oblique hole, and straight hole form an optical fiber channel. The optical fiber is integrated in the optical fiber channel inside the insulator.

[0005] The fiber optic protective connector is located at the bottom of the upper flange hardware and the lower flange hardware, and its outer end is connected to the fiber optic protective tube.

[0006] The upper flange hardware has an optical fiber outlet hole in the middle of the bottom flange and multiple assembly through holes around its perimeter; the optical fiber protective connector is assembled with the upper flange hardware through the optical fiber outlet hole.

[0007] The lower flange hardware has a fiber optic outlet hole 2 and an assembly through hole 2 in the middle of the bottom flange, and a reinforcing rib plate around the perimeter; the fiber optic protective connector is assembled with the lower flange hardware through the fiber optic outlet hole 2.

[0008] The optical fiber is a single-mode optical fiber, a multimode optical fiber, a polarization-maintaining optical fiber, or a combination of any two or three of these types of optical fiber.

[0009] The diameter of the large-diameter slotted mandrel is not less than 220mm.

[0010] The optical fiber is laid flat in the spiral groove on the surface of the large-diameter slotted core rod, and its two ends pass through oblique holes and straight holes to exit through optical fiber outlet one or optical fiber outlet two, and finally out through the optical fiber protective tube.

[0011] Beneficial effects: This utility model can fill the gap in the field of support fiber composite insulators for high voltage DC transmission above ±400kV. It is lightweight, compact in structure, easy to install and operate, safe and reliable, energy-saving and environmentally friendly, with strong applicability and good performance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a structural schematic diagram of the upper flange fitting of this utility model;

[0014] Figure 3 This utility model Figure 2 A schematic diagram of the AA cross-section;

[0015] Figure 4 This is a schematic diagram of the structure of the large-diameter slotted mandrel of this utility model;

[0016] Figure 5 This utility model Figure 4 BB cross-sectional diagram;

[0017] Figure 6 This is a schematic diagram of the structure of the lower flange fitting of this utility model;

[0018] Figure 7 This utility model Figure 6 A schematic diagram of the CC cross-section.

[0019] In the diagram: 1. Upper flange fitting; 2. Large-diameter slotted mandrel; 3. Silicone rubber umbrella sleeve; 4. Lower flange fitting; 5. Fiber optic protective connector; 6. Fiber optic protective tube; 7. Fiber optic cable; 11. Fiber optic outlet hole one; 12. Assembly through hole one; 21. Spiral groove; 22. Angled hole; 23. Straight hole; 41. Fiber optic outlet hole two; 42. Assembly through hole two; 43. Reinforcing rib plate. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] like Figures 1-7As shown, this utility model provides a high-voltage DC support fiber optic composite insulator, including an upper flange fitting 1, a large-diameter slotted core rod 2, a silicone rubber awning 3, a lower flange fitting 4, a fiber optic protective connector 5, a fiber optic protective tube 6, and an optical fiber 7. The silicone rubber awning 3 is made of organic silicone rubber material and encloses the large-diameter slotted core rod 2. The upper flange fitting 1 and the lower flange fitting 4 are assembled with the large-diameter slotted core rod 2 by crimping or gluing, respectively. The surface of the large-diameter slotted core rod 2 is machined with a spiral groove 21 for laying optical fibers. Straight holes 23 are machined at both ends of the spiral groove 21, and an oblique hole 22 is opened at the end of the spiral groove 21 to connect to the bottom of the straight hole 23. The spiral groove 21, the oblique hole 22, and the straight hole 23 form an optical fiber channel. The optical fiber 7 is integrated in the optical fiber channel inside the insulator, converting the collected signal into an optical signal for transmission, and is used in electrical equipment such as DC current transformers in the field of ±400kV and above high-voltage DC transmission.

[0022] The fiber optic protective connector 5 is located at the bottom of the upper flange hardware 1 and the lower flange hardware 4, and its outer end is connected to the fiber optic protective tube 6.

[0023] The upper flange fitting 1 has an optical fiber outlet hole 11 in the middle of the bottom flange and multiple assembly through holes 12 around its perimeter; the optical fiber protective connector 5 is assembled with the upper flange fitting 1 through the optical fiber outlet hole 11.

[0024] The lower flange fitting 4 has a fiber optic outlet hole 41 and an assembly through hole 42 in the middle of the bottom flange, and a reinforcing rib plate 43 around it; the fiber optic protective connector 5 is assembled with the lower flange fitting 4 through the fiber optic outlet hole 41.

[0025] The optical fiber 7 is a single-mode optical fiber, a multimode optical fiber, a polarization-maintaining optical fiber, or a combination of any two or three types of optical fibers.

[0026] The diameter of the large-diameter slotted mandrel 2 is 220mm.

[0027] The optical fiber 7 is laid flat in the spiral groove 21 on the surface of the large-diameter slotted core rod 2, and its two ends pass through the oblique hole 22 and the straight hole 23 to pass through the optical fiber outlet hole 11 or the optical fiber outlet hole 41, and finally pass out from the optical fiber protective tube 6.

[0028] This invention integrates optical fiber inside an insulator to convert the collected signal into an optical signal for transmission. It can be used in electrical equipment such as DC current transformers in the field of high voltage DC transmission above ±400kV.

[0029] This invention fills the gap in the field of support fiber composite insulators for high voltage direct current transmission above ±400kV. It is lightweight, compact, easy to install and operate, and is a safe, reliable, energy-saving and environmentally friendly product with strong applicability and good performance.

[0030] The above-described embodiments of this utility model are merely illustrative examples and are not the only ones. All modifications within the scope of this utility model or equivalent to this utility model are encompassed by this utility model.

Claims

1. A high-voltage DC support fiber optic composite insulator, characterized in that: The insulator includes an upper flange fitting (1), a large-diameter slotted core rod (2), a silicone rubber umbrella sleeve (3), a lower flange fitting (4), an optical fiber protective connector (5), an optical fiber protective tube (6), and an optical fiber (7). The silicone rubber umbrella sleeve (3) encloses the large-diameter slotted core rod (2). The upper flange fitting (1) and the lower flange fitting (4) are assembled with the large-diameter slotted core rod (2) by crimping or gluing, respectively. The surface of the large-diameter slotted core rod (2) is processed with a spiral groove (21), and straight holes (23) are processed at both ends. An oblique hole (22) is opened at the end of the spiral groove (21) to connect to the bottom of the straight hole (23). The spiral groove (21), the oblique hole (22), and the straight hole (23) form an optical fiber channel. The optical fiber (7) is integrated in the optical fiber channel inside the insulator.

2. The high-voltage DC support fiber optic composite insulator according to claim 1, characterized in that: The fiber optic protective connector (5) is located at the bottom of the upper flange fitting (1) and the lower flange fitting (4), and its outer end is connected to the fiber optic protective tube (6).

3. The high-voltage DC support fiber optic composite insulator according to claim 1, characterized in that: The upper flange fitting (1) has an optical fiber outlet hole (11) in the middle of the bottom flange and multiple assembly through holes (12) around its perimeter; the optical fiber protective connector (5) is assembled with the upper flange fitting (1) through the optical fiber outlet hole (11).

4. The high-voltage DC support fiber optic composite insulator according to claim 1, characterized in that: The lower flange fitting (4) has a fiber optic outlet hole 2 (41) and an assembly through hole 2 (42) in the middle of the bottom flange, and a reinforcing rib plate (43) around it; the fiber optic protective connector (5) is assembled with the lower flange fitting (4) through the fiber optic outlet hole 2 (41).

5. The high-voltage DC support fiber optic composite insulator according to claim 1, characterized in that: The optical fiber (7) is a single-mode optical fiber, a multimode optical fiber, a polarization-maintaining optical fiber, or a combination of any two or three types of optical fibers.

6. The high-voltage DC support fiber optic composite insulator according to claim 1, characterized in that: The diameter of the large-diameter slotted mandrel (2) is not less than 220 mm.

7. The high-voltage DC support fiber optic composite insulator according to any one of claims 1-6, characterized in that: The optical fiber (7) is laid flat in the spiral groove (21) on the surface of the large-diameter slotted core rod (2), and its two ends pass through the oblique hole (22) and the straight hole (23) from the first optical fiber outlet (11) or the second optical fiber outlet (41), and finally pass out from the optical fiber protective tube (6).

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