Wind power generation outdoor 35KV isolation knife switch

Abstract

An upper special-shaped connecting rod and a lower special-shaped connecting rod are fixedly connected with an insulator through bolts, a connecting sheet is fixedly connected with the special-shaped connecting rod at the upper end through bolts, and a tower spring and a pressure spring are arranged at the contact part of the connecting sheet and an electrode at the upper end of an outer epoxy sleeve of a high-voltage fuse. The U-shaped clamp is fixed on the connecting sheet, the upper part of the high-voltage fuse outer epoxy sleeve is clamped in the U-shaped clamp, and the electrode is in close contact with the pressure spring; the lower portion of the high-voltage fuse outer epoxy sleeve is fixedly connected with a special-shaped hook through a sleeve piece, one end of the special-shaped hook is fixed to one end of a base, the other end of the special-shaped hook is movably connected to the other end of the base, a rotating shaft is arranged in the special-shaped hook, and the base is fixed to a special-shaped connecting rod at the lower end.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation equipment, in particular to an outdoor 35KV isolation switch for wind power generation. Background Art

[0002] The isolating knife switch is the most commonly used electrical device in high-voltage switchgear. Its working principle and structural design are simple, and it is mainly used in high-voltage switchgear. The main functions of the isolating knife switch are as follows: after opening, it establishes a reliable insulation gap, isolating the equipment or line requiring maintenance from the power supply with a clear disconnection point to ensure the safety of maintenance personnel and equipment. According to operational needs, it switches the line to open and close small current tubes in the line, such as the charging current of bushings, busbars, terminal blocks, and the capacitive current of switch capacitors. Depending on the specific conditions of different structural types, it is used to open and close the no-load excitation current of transformers of a certain capacity. Therefore, the isolating knife switch is widely used and has strong working reliability. It is widely used in the design, construction and safe operation of substations and power plants.

[0003] Traditional insulators put into operation earlier may have problems such as knife switch corrosion, difficulty in operation, degradation of insulation performance, and aging under certain extreme operating conditions. They are also inconvenient to install and prone to falling off, which can cause circuit paralysis and affect the stable operation of the system. Summary of the Invention

[0004] To address this problem, the utility model provides an outdoor 35KV isolation knife switch for wind power generation. The supporting insulators of the outdoor 35KV isolation knife switch for wind power generation are modified and replaced with high-voltage fuses, so as to quickly cut off the circuit in the event of a fault, protect the system from damage, and improve the insulation performance and reliability of the equipment.

[0005] The technical solution of the utility model is a 35KV outdoor isolating knife switch for wind power generation, comprising an insulator, characterized in that two upper and lower special-shaped connecting rods are fixedly connected to the insulator by bolts, a connecting piece and the special-shaped connecting rod at the upper end are fixedly connected by bolts, a tower spring and a compression spring are provided at the contact portion between the connecting piece and the electrode at the upper end of the outer epoxy sleeve of the high-voltage fuse, a U-shaped clamp is fixed on the connecting piece, the upper part of the outer epoxy sleeve of the high-voltage fuse is clamped in the U-shaped clamp, and the electrode is in close contact with the compression spring; the lower part of the outer epoxy sleeve of the high-voltage fuse is fixedly connected to the special-shaped hook through a kit, one end of the special-shaped hook is fixed to one end of the base, and the other end is movably connected to the other end of the base, a rotating shaft is provided inside the special-shaped hook, and the base is fixed to the special-shaped connecting rod at the lower end; a fuse is passed through the outer epoxy sleeve of the high-voltage fuse, the upper end of the fuse is fixed to the electrode, and the lower end is wound around the rotating shaft inside the special-shaped hook.

[0006] Furthermore, the angle between the line connecting the centers of the upper and lower insulators and the center line of the outer epoxy bushing of the high-voltage fuse is 15 degrees.

[0007] Furthermore, an operating handle is fixed on the outer epoxy sleeve of the high-voltage fuse.

[0008] Beneficial effects of the utility model

[0009] (1) Improve equipment safety: Through the fast-blow function of the high-voltage fuse, the circuit can be quickly cut off in the event of a fault, preventing the fault from expanding and protecting the system safety.

[0010] (2) Enhanced insulation performance: Use specially designed insulation structures and materials to improve the insulation performance of the device and reduce the risk of failure due to insulation aging or damage.

[0011] (3) Simplify the maintenance process: High-voltage fuses are easy to replace and maintain, which can reduce the maintenance cost and difficulty of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 It is a structural diagram of a special-shaped hook;

[0014] Figure 3 It is a structural diagram of a U-shaped clamp;

[0015] Figure 4 yes Figure 3 A top view of

[0016] Description of the accompanying figures: high-voltage fuse outer epoxy sleeve 1, connecting piece 2, special-shaped connecting rod 3, U-shaped clamp 4, tower spring 5, compression spring 6, operating handle 7, kit 8, insulator 9, electrode 10, fuse 11, special-shaped hook 12, rotating shaft 13, base 14. DETAILED DESCRIPTION

[0017] like Figure 1 The figure shows an outdoor 35kV disconnect switch for wind turbines, comprising a high-voltage fuse outer epoxy sleeve 1, a connecting piece 2, a special-shaped connecting rod 3, a U-shaped clamp 4, a tower spring 5, a compression spring 6, an operating handle 7, a sleeve 8, an insulator 9, an electrode 10, a fuse 11, a special-shaped hook 12, a rotating shaft 13, and a base 14. The high-voltage fuse, as a core component, is installed in the original blade head position and is bolted to the insulator 9 via a specially designed special-shaped connecting rod 3. The bolted connection between the connecting piece 2 and the special-shaped connecting rod 3 effectively increases the insulation length, ensuring that the device's voltage resistance meets national standards.

[0018] The contact portion between the connecting piece 2 and the electrode 10 at the upper end of the outer epoxy sleeve 1 of the high-voltage fuse is provided with a tower spring 5 and a compression spring 6 to ensure reliable conductive contact and avoid arcing.

[0019] A U-shaped clamp 4 is fixed to the connecting piece 2. The upper portion of the high-voltage fuse outer epoxy sleeve 1 is clamped within the U-shaped clamp 4, and the electrode 10 is in close contact with the compression spring 6. The lower portion of the high-voltage fuse outer epoxy sleeve 1 is fixedly connected to a special-shaped hook 12 via a sleeve 8. One end of the special-shaped hook 12 is fixed to one end of the base 14, and the other end is movably connected to the other end of the base 14. A rotating shaft 13 is provided inside the special-shaped hook 12, and the base 14 is fixed to the special-shaped connecting rod 3 at the lower end.

[0020] A fuse 11 is inserted into the outer epoxy sleeve 1 of the high-voltage fuse. The upper end of the fuse is fixed on the electrode 10 , and the lower end is wound on the rotating shaft 13 inside the special-shaped hook 12 .

[0021] When the fuse 11 is blown due to the fault current, the rotating shaft 13 drives the upper end of the special-shaped hook 12 to separate from the base 14 and flip downward, thereby driving the upper end of the outer epoxy sleeve 1 of the high-voltage fuse to separate from the U-shaped clamp 4, quickly isolating the faulty part and quickly cutting off the circuit to prevent the fault from spreading to the entire system.

[0022] The operating handle 7 is fixed on the outer epoxy sleeve 1 of the high-voltage fuse for easy operation.

[0023] The angle between the center line of the upper and lower insulators 9 and the center line of the outer epoxy bushing 1 of the high-voltage fuse is 15 degrees.

[0024] This utility model features a 35kV outdoor wind turbine isolation switch that replaces traditional support insulators with high-voltage fuses. High-voltage fuses not only withstand higher voltage levels but also rapidly interrupt fault currents, effectively isolating the faulted portion of the circuit when an anomaly occurs, preventing the fault from spreading to the entire system. Compared to traditional insulators, high-voltage fuses offer superior electrical performance and a higher safety factor, effectively reducing the risk of accidents caused by insulation aging or damage.

Claims

1. A 35KV outdoor isolation switch for wind power generation, comprising an insulator (9), characterized in that: The upper and lower special-shaped connecting rods (3) are fixedly connected to the insulator (9) by bolts, the connecting piece (2) and the upper special-shaped connecting rod (3) are fixedly connected by bolts, the contact portion between the connecting piece (2) and the electrode (10) at the upper end of the high-voltage fuse outer epoxy sleeve (1) is provided with a tower spring (5) and a compression spring (6), the U-shaped clamp (4) is fixed on the connecting piece (2), the upper part of the high-voltage fuse outer epoxy sleeve (1) is clamped in the U-shaped clamp (4), and the electrode (10) is in close contact with the compression spring (6); the high-voltage fuse outer epoxy sleeve (1) is fixed to the U-shaped clamp (4), and the electrode (10) is in close contact with the compression spring (6); The lower part of the sleeve (1) is fixedly connected to the special-shaped hook (12) through the kit (8), one end of the special-shaped hook (12) is fixed to one end of the base (14), and the other end is movably connected to the other end of the base (14), a rotating shaft (13) is provided inside the special-shaped hook (12), and the base (14) is fixed to the special-shaped connecting rod (3) at the lower end; a fuse wire (11) is passed through the epoxy sleeve (1) outside the high-voltage fuse, the upper end of the fuse wire is fixed to the electrode (10), and the lower end is wound around the rotating shaft (13) inside the special-shaped hook (12).

2. The outdoor 35KV isolation switch for wind power generation as claimed in claim 1 is characterized in that: The angle between the connecting line between the centers of the upper and lower insulators and the center line of the outer epoxy bushing of the high-voltage fuse is 15 degrees.

3. The outdoor 35KV isolation switch for wind power generation as claimed in claim 1 is characterized in that: An operating handle (7) is fixed on the outer epoxy sleeve (1) of the high-voltage fuse.

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