Multifunctional high-voltage integrated vacuum circuit breaker

Abstract

A multifunctional high-voltage integrated vacuum circuit breaker belongs to the technical field of vacuum circuit breakers for new energy Hua transformation and comprises a shell, an isolation knife, an integrated mechanism and a grounding knife, and the isolation knife, the integrated mechanism, the grounding knife, a solid-sealed vacuum arc-extinguishing chamber with a protection function, a reinforced CT and a flexible connector are arranged on the shell. The isolation switch, the grounding switch, the solid-sealed vacuum arc-extinguishing chamber and the reinforced CT are all connected with the integrated mechanism, the solid-sealed vacuum arc-extinguishing chamber is connected with the reinforced CT through flexible connection, and the reinforced CT is connected with the grounding switch. According to the utility model, the serious defect of the external isolation knife of the original circuit breaker is solved, the isolation knife is arranged on the circuit breaker shell, the vacuum arc-extinguishing chamber is arranged in the insulating material with protection, and the circuit breaker is integrally installed instead of being separated in the past, so that the space and the material are saved, the circuit breaker is safe and reliable, and accurate opening and service life are effectively ensured; problems of interlocking failure of the disconnecting switch, transportation damage of the arc extinguish chamber, equipment burning due to overvoltage and the like in the prior art are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum circuit breakers for new energy transformers, and specifically relates to a multifunctional high-voltage integrated vacuum circuit breaker. Background Art

[0002] In recent years, the vacuum high-voltage circuit breakers of new energy sources such as wind power and photovoltaic power generation, hereinafter referred to as new energy switches, have been successfully applied to power systems with their simple structure, few parts, high reliability, sensitive precision, and long service life. At present, the structure of new energy switches is developing in a diversified direction, and the disclosure of numerous patent technologies has promoted the continuous improvement of new energy switch technology. Although these patent technologies are relatively advanced, they are relatively complicated in manufacturing process and assembly, especially the isolating knife, five-protection interlocking, vacuum arc extinguishing chamber and other parts have become the main crux of the current products. The large design volume not only wastes raw materials, but also wastes labor cumbersomely. The live body is exposed, and there are many hard-linked parts, which poses a great safety hazard to the operation of the line. It often stagnates during operation, which is easy to cause personal safety of operators. At present, the main domestic methods are to install the isolating knife switch separately, the external arc extinguishing chamber, and the five-protection interlocking are easy to fail. First, this method requires a large space and is not conducive to miniaturization. Second, once a fault or damage occurs, the isolating knife assembly needs to be replaced, resulting in errors in subsequent coordination, long power outage time, unreliable separation and interlocking failure, causing unsafe equipment and personnel. In addition, the accuracy of the existing technology is unstable, and the operation is often inflexible. Utility Model Content

[0003] In order to solve the defects of the prior art, a multifunctional high-voltage integrated vacuum circuit breaker is provided, comprising a shell, an isolating knife, an integrated mechanism, and a grounding knife. The shell is equipped with an isolating knife, an integrated mechanism, a grounding knife, a sealed vacuum arc chamber with a protective function, a reinforced CT, and a soft connection. The isolating knife, the grounding knife, the sealed vacuum arc chamber, and the reinforced CT are all connected to the integrated mechanism. The sealed vacuum arc chamber is connected to the reinforced CT through a soft connection, and the reinforced CT is connected to the grounding knife.

[0004] Furthermore, the sealed vacuum interrupter is connected to the housing via a pollution flash prevention rod.

[0005] Furthermore, the isolating knife includes an electric sensor, a high-strength insulator, and an isolating knife guide. The sealed vacuum arc extinguishing chamber with a protective function is cast integrally with the high-strength insulator, and a direct-connected conductive part is used inside. The high-strength insulator is connected to the electric sensor through the isolating knife guide. An anti-pollution flashover 2 pull rod is provided on the isolating knife to increase the creepage distance.

[0006] Furthermore, the housing is connected to the overvoltage absorber through an integral mounting ground plate, and the overvoltage absorber is connected to the isolating switch.

[0007] Furthermore, the integrated mechanism includes a switch mechanism, an anti-misoperation isolation knife mechanism, and a grounding mechanism, and the switch mechanism is connected to the anti-misoperation isolation knife mechanism and the grounding mechanism by a hard-connected direct connection plate.

[0008] The beneficial effects of the utility model are as follows: the utility model provides a multifunctional high-voltage integrated vacuum circuit breaker with a smaller volume, simpler structure, material saving, high reliability and precision, maintenance-free and simple operation. The utility model solves the serious defects of the original external isolating knife of the circuit breaker. The isolating knife is installed on the circuit breaker housing and the vacuum arc extinguishing chamber is placed in a protective insulating material. The circuit breaker is changed from a separate body to an integrated installation, which saves space and materials, is safe and reliable, and effectively guarantees accurate opening and service life, avoiding the problems of interlocking failure of isolating switches, damage to arc extinguishing chambers during transportation, and equipment burning caused by overvoltage in the past. The use of this technology can reduce the probability of damaged parts, reduce space, and increase reliability and operational safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The utility model is a schematic diagram of the structure of a multifunctional high-voltage integrated vacuum circuit breaker.

[0010] The figure numbers are as follows: 1. Shell, 2. Sealed vacuum interrupter, 3. Anti-pollution flashover 1 pull rod, 4. Reinforced CT, 5. Overvoltage absorber, 6. Integrated grounding plate, 7. Electric sensor, 8. Isolating knife, 9. High-strength insulator, 10. Integrated mechanism, 11. Grounding knife, 12. Flexible connection, 13. Anti-pollution flashover 2 pull rod, 14. Isolating knife guide. DETAILED DESCRIPTION

[0011] A multifunctional high voltage integrated vacuum circuit breaker, such as Figure 1 As shown, it includes a housing 1, a sealed vacuum interrupter 2 with a protective function, an anti-pollution flash 1 pull rod 3, a reinforced CT 4, an overvoltage absorber 5, an integrated installation grounding plate 6, an electric sensor 7, an isolating knife 8, a high-strength insulator 9, an integrated mechanism 10, a grounding knife 11, a flexible connection 12, an anti-pollution flash 2 pull rod 13, and an isolating knife guide 14;

[0012] The sealed vacuum interrupter 2 is connected to the housing 1 via a pollution-proof flashover rod 3 .

[0013] The above-mentioned sealed vacuum arc chamber 2 with protective function is installed on the right side of the shell 1. The inside and outside of the vacuum arc chamber 2 are protected by an insulating layer, which is not easily damaged by external collisions and will not be damaged due to deformation during transportation. The sealed vacuum arc chamber with protective function is formed in one step without deformation and condensation.

[0014] Among them, the isolating knife 8 includes an electric sensor 7, a high-strength insulator 9, and an isolating knife guide 14. The sealed vacuum arc extinguishing chamber 2 with a protective function and the high-strength insulator 9 are cast as one piece, and a direct-connected conductive part is used inside. The high-strength insulator 9 is connected to the electric sensor 7 through the isolating knife guide 14. The isolating knife 8 is provided with an anti-pollution flash 2 pull rod 13 for increasing the creepage distance.

[0015] The isolating knife 8 is on the left side of the housing 1, and is composed of a high-strength insulator, an electric sensor, an anti-pollution flashover pull rod 2, and an isolating knife flow guide, which are reliably interlocked in an integrated mechanism 10;

[0016] The housing 1 is connected to the overvoltage absorber 5 via an integrally mounted grounding plate 6 , and the overvoltage absorber 5 is connected to the isolating switch 8 .

[0017] The integrated mechanism 10 includes a switch mechanism, an anti-misoperation isolation knife mechanism, and a grounding mechanism. The switch mechanism, the anti-misoperation isolation knife mechanism, and the grounding mechanism are connected by a hard-connected direct connection plate, so that there will be no five-protection interlocking failure.

[0018] The above-mentioned isolating knife 8 has interlocking in the closing and opening positions to prevent automatic falling off;

[0019] All components of the above-mentioned multifunctional high-voltage integrated vacuum circuit breaker are mounted on the switch body;

[0020] The specific implementation process of the utility model is as follows:

[0021] 1. The housing 1 is equipped with a sealed vacuum interrupter 2 with protective function, a pull rod 3 for anti-pollution flash 1, a reinforced CT 4, an overvoltage absorber 5, an integrated grounding plate 6, an electric sensor 7, an isolating knife 8, a high-strength insulator 9, an integrated mechanism 10, a grounding knife 11, a flexible connection 12, a pull rod 13 for anti-pollution flash 2, and an isolating knife guide 14;

[0022] 2. In order to reduce the overvoltage of the equipment, an overvoltage absorber 5 is installed on the housing 1 through an integral mounting grounding plate 6;

[0023] 3. Anti-pollution flashover 1 tie rod 3 and anti-pollution flashover 2 tie rod 13 are made of synthetic silicone material to increase the creepage distance, so as to prevent flashover discharge caused by dust accumulation during operation, which may cause insulation damage and lead to accidents;

[0024] 4. The sealed vacuum interrupter 2 with protective function is cast in one piece with the high-strength insulator 9, and a direct-connected conductive part is used inside to reduce the circuit resistance, ensure the stable operation of the primary circuit, and effectively protect the vacuum interrupter;

[0025] 5. The electric sensor 7 on the isolation knife 8 can play the role of insulation support and also play the role of charged sensing;

[0026] 6. The integrated mechanism has a hard-link interlocking function to prevent misoperation. The hard-link interlocking means that after the interlocking is started, it cannot be operated in any way and can only be operated by contact. It is different from the soft interlocking. The soft interlocking can be released by a force greater than the normal operation.

[0027] 7. The soft connection 12 connects the enhanced CT4 and the sealed vacuum interrupter 2 with a protective function to form a circuit. The soft connection can reduce the damage to the enhanced CT4 caused by the electric force generated by the electromotive force, and ensure the reliable operation of the primary circuit;

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A multifunctional high-voltage integrated vacuum circuit breaker, characterized in that: The invention comprises a housing (1), an isolating knife (8), an integrated mechanism (10), and a grounding knife (11). The housing (1) is equipped with an isolating knife (8), an integrated mechanism (10), a grounding knife (11), a solid-sealed vacuum interrupter (2) with a protective function, a reinforced CT (4), and a flexible connection (12). The isolating knife (8), the grounding knife (11), the solid-sealed vacuum interrupter (2), and the reinforced CT (4) are all connected to the integrated mechanism (10). The solid-sealed vacuum interrupter (2) is connected to the reinforced CT (4) via the flexible connection (12), and the reinforced CT (4) is connected to the grounding knife (11).

2. The multifunctional high-voltage integrated vacuum circuit breaker according to claim 1, characterized in that: The sealed vacuum interrupter (2) is connected to the housing (1) via an anti-pollution flashover 1 tie rod (3).

3. The multifunctional high-voltage integrated vacuum circuit breaker according to claim 1, characterized in that: The isolating knife (8) comprises an electric sensor (7), a high-strength insulator (9), and an isolating knife flow guide (14); a sealed vacuum arc extinguishing chamber (2) having a protective function and the high-strength insulator (9) are integrally cast, and a direct-connected conductive part is used inside the isolating knife. The high-strength insulator (9) is connected to the electric sensor (7) via the isolating knife flow guide (14); and an anti-pollution flashover 2 pull rod (13) for increasing the creepage distance is provided on the isolating knife (8).

4. The multifunctional high-voltage integrated vacuum circuit breaker according to claim 1, characterized in that: The housing (1) is connected to the overvoltage absorber (5) via an integrally mounted grounding plate (6), and the overvoltage absorber (5) is connected to an isolating blade (8).

5. The multifunctional high-voltage integrated vacuum circuit breaker according to claim 1, characterized in that: The integrated mechanism (10) comprises a switch mechanism, an anti-misoperation isolating knife mechanism, and a grounding mechanism, and the switch mechanism is connected to the anti-misoperation isolating knife mechanism and the grounding mechanism by a hard-connected direct connection plate.

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