12kV primary fusion type environment-friendly intelligent circuit breaker

Abstract

The utility model discloses a 12kV primary fusion type environment-friendly intelligent circuit breaker, and belongs to the technical field of electricity and electric power. Comprising a support, a sealing shell and two sets of wire inlet sleeves and wire outlet sleeves arranged at the top of the sealing shell, the wire outlet sleeves are located at the bottoms of the wire inlet sleeves, the wire outlet sleeve on one side is connected with an isolation disconnecting link structure through a conductive contact finger and a conductive connecting lever, and the wire outlet sleeve on the other side is connected with a vacuum arc-extinguishing chamber structure through a sensor module and a conductive arm. The vacuum arc-extinguishing chamber structure is connected with the isolation switch structure through an interlocking device. The utility model has the advantages of high reliability, long service life, environmental protection property, high performance, one-time integration miniaturization, intelligence, simple installation and maintenance and the like, plays an important role in an electric power system, not only improves the operation efficiency and safety of the electric power system, but also promotes the green, low-carbon and sustainable development of the electric power system.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical and electric power, in particular to a 12kV primary fusion type environmentally friendly intelligent circuit breaker. Background Art

[0002] With the development of the power industry and the upgrading of the power grid, higher requirements are placed on high-voltage circuit breakers. As one of the key equipment in the power system, the 12kV primary fusion environmentally friendly vacuum circuit breaker can meet the needs of modern power grids for high reliability, high efficiency and environmental protection.

[0003] The existing insulation circuit breakers still have the following shortcomings:

[0004] 1. Sensitive to moisture: SF6 gas is very sensitive to moisture. Moisture will react chemically with SF6 gas to generate harmful substances, such as sulfuric acid, gaseous fluoride, etc. These substances will corrode the metal materials inside the circuit breaker, thereby affecting the performance and life of the circuit breaker.

[0005] 2. Decomposition at high temperature: Under high temperature conditions, SF6 gas will decompose to produce toxic substances, such as sulfur and fluorine compounds, which are harmful to the human body and the environment. In addition, high temperature will accelerate the leakage of SF6 gas, thereby affecting the insulation performance of the circuit breaker.

[0006] 3. High cost: The manufacturing cost and maintenance cost of SF6 circuit breakers are relatively high, mainly because the price of SF6 gas is high. Special equipment and technology are also required to ensure the sealing and reliability of the circuit breaker.

[0007] 4. High requirements for operation and maintenance: Due to the complex structure and principle of SF6 circuit breakers, the requirements for their operation and maintenance are also high. Improper operation and maintenance may cause circuit breaker performance degradation or failure.

[0008] 5. The external isolation knife switch takes up a lot of space and is inconvenient to install on a pole. Utility Model Content

[0009] The purpose of the utility model is to provide a 12kV primary fusion type environmentally friendly intelligent circuit breaker, which integrates 12kV primary equipment circuit breakers, isolation switches and other primary equipment into one; adopts new insulation materials, designs and develops new solid insulation and dry air instead of SF6 gas insulation to meet environmental certification requirements.

[0010] To achieve the above-mentioned purpose, the utility model provides a 12kV primary fusion type environmentally friendly intelligent circuit breaker, comprising a bracket, a sealed shell and two groups of incoming bushings and outgoing bushings arranged on the top of the sealed shell, the outgoing bushings are located at the bottom of the incoming bushings, the outgoing bushings on one side are connected to the isolation knife switch structure through conductive contacts, conductive arms and insulating brackets, and the outgoing bushings on the other side are connected to the vacuum interrupter structure through a sensor module and a conductive arm, and the vacuum interrupter structure is connected to the isolation knife switch structure through an interlocking device.

[0011] Preferably, the isolation knife switch structure includes an isolation knife switch static contact, which is connected to the second crank arm through the isolation knife switch moving contact, and the second crank arm is respectively connected to the isolation knife switch closing spring and one end of the interlocking device through the isolation knife switch three-phase drive shaft.

[0012] Preferably, the vacuum arc chamber structure includes a vacuum arc chamber, one end of the vacuum arc chamber is connected to a vacuum arc chamber static contact conductive arm, the vacuum arc chamber static contact conductive arm is connected to the second crank arm through a conductive flexible connection, the other end of the vacuum arc chamber is connected to an insulating pull rod, and the insulating pull rod is connected to the other end of the interlocking device through a three-phase drive shaft and crank arm one.

[0013] Preferably, the sensor module includes a voltage signal sensor and a current signal sensor, and the voltage signal sensor and the current signal sensor are both located in the outlet bushing on the other side.

[0014] Preferably, slightly-pressure nitrogen / air is provided at the top end of the sealed housing.

[0015] Therefore, the utility model adopts a 12kV primary fusion type environmentally friendly intelligent circuit breaker with the above structure, which has the following beneficial effects:

[0016] (1) High reliability: The vacuum arc extinguishing technology enables the arc to be extinguished quickly in a vacuum environment during the opening and closing process, greatly improving the reliability of the circuit breaker. In addition, its unique structural design also reduces the possibility of mechanical failure, further enhancing the overall reliability.

[0017] (2) Long life: Since there are fewer parts in the vacuum interrupter and there is no consumable medium such as oil and gas, the maintenance workload is relatively small and the life is relatively long. In addition, the one-time design of the circuit breaker also reduces the performance degradation and failure that may be caused by multiple assembly and disassembly, thereby extending the service life.

[0018] (3) Environmental protection: Vacuum circuit breakers do not contain harmful gases such as oil and SF6, so they will not pollute the environment during operation. In addition, the insulating materials they use are also environmentally friendly and meet the green, low-carbon and sustainable development requirements of modern power systems.

[0019] (4) Primary integration and miniaturization: The primary equipment disconnector and vacuum circuit breaker are integrated together and reasonably laid out and configured, thereby achieving miniaturization of the overall structure of the circuit breaker.

[0020] (5) High performance: The circuit breaker has good breaking performance and mechanical properties, can quickly and accurately cut off the fault current, and protect the safe and stable operation of the power system. At the same time, its electrical performance is stable and can withstand high voltage and current shocks.

[0021] (6) Intelligence: With the advancement of technology, modern 12kV primary fusion environmentally friendly intelligent circuit breakers are often equipped with intelligent control and protection systems. These systems can monitor the operating status of the circuit breaker in real time, predict potential faults, and automatically make adjustments or sound alarms when necessary. This not only improves the operating efficiency of the circuit breaker, but also reduces the difficulty and cost of manual maintenance.

[0022] (7) Easy installation and maintenance: Due to the compact structure and reasonable design of the circuit breaker, the installation process is relatively simple. At the same time, the maintenance workload is also small, only regular inspection and maintenance are required, and no complicated maintenance operations are required.

[0023] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the internal structure of a 12kV primary fusion type environmentally friendly intelligent circuit breaker of the utility model;

[0025] Figure 2 This is a schematic diagram of the external structure of a 12kV primary fusion type environmentally friendly intelligent circuit breaker of the utility model;

[0026] Reference numerals

[0027] 1. Bracket, 2. Sealed shell, 3. Isolating knife switch static contact, 4. Isolating knife switch moving contact, 5. Insulating bracket, 6. Conductive crank arm, 7. Conductive flexible connection, 8. Conductive arm of vacuum interrupter static contact, 9. Vacuum interrupter, 10. Conductive contact finger, 11. Micro-pressure nitrogen / air, 12. Outgoing bushing, 13. Incoming bushing, 14. Voltage signal sensor, 15. Current signal sensor, 16. Conductive arm, 17. Insulating pull rod, 18. Interlocking device, 19. Three-phase drive shaft, 20. Crank arm one, 21. Isolating knife switch closing spring, 22. Crank arm two, 23. Isolating knife switch three-phase drive shaft. DETAILED DESCRIPTION

[0028] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.

[0029] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] Example

[0031] like Figure 1-2 As shown, the utility model provides a 12kV primary fusion type environmentally friendly intelligent circuit breaker, including a bracket 1, a sealed shell 2 and two groups of incoming bushings 13 and outgoing bushings 12 arranged on the top of the sealed shell, the outgoing bushings 12 are located at the bottom of the incoming bushings 13, the outgoing bushings 12 on one side are connected to the isolation knife switch structure through a conductive contact finger 10, a conductive crooked arm 6 and an insulating bracket 5, and the outgoing bushings 12 on the other side are connected to the vacuum interrupter structure through a sensor module and a conductive arm 16, and the vacuum interrupter structure is connected to the isolation knife switch structure through an interlocking device 18.

[0032] The isolation switch structure includes an isolation switch static contact 3, which is connected to the second crank arm 22 through the isolation switch moving contact 4. The second crank arm 22 is connected to the isolation switch closing spring 21 and one end of the interlocking device 18 through the isolation switch three-phase drive shaft 23.

[0033] The vacuum arc chamber structure includes a vacuum arc chamber 9, one end of which is connected to a vacuum arc chamber static contact conductive arm 8, which is connected to a second crank arm 22 via a conductive flexible connection 7, and the other end of the vacuum arc chamber 9 is connected to an insulating pull rod 17, which is connected to the other end of an interlocking device 18 via a three-phase drive shaft 19 and a crank arm 1 20.

[0034] The sensor module includes a voltage signal sensor 14 and a current signal sensor 15, both of which are located in the outlet bushing on the other side. A micro-pressure nitrogen / air 11 is arranged at the top of the sealed housing 2.

[0035] The advanced vacuum arc extinguishing technology is adopted. This technology uses the high insulation strength and rapid arc extinguishing ability of the vacuum environment to achieve rapid and reliable circuit cutting during the opening and closing process of the circuit breaker. The vacuum arc extinguishing technology is not only fast, efficient and pollution-free, but also improves the electrical performance of the circuit breaker, extends the service life of the circuit breaker, and reduces maintenance costs.

[0036] As an important part of the 12kV primary fusion environmental protection intelligent circuit breaker, the design of the isolating switch fully considers the convenience and safety of operation. The isolating switch adopts a three-position design, namely the closing, opening and grounding positions, which can be quickly switched through mechanical operation. At the same time, the isolating switch has a reliable mechanical interlocking device to ensure that there will be no misoperation during operation, ensuring the safety of personnel and equipment.

[0037] The primary and secondary integration technology is adopted to closely integrate the primary equipment with the secondary protection and control equipment to achieve intelligent and automatic operation. By integrating secondary equipment such as sensors and controllers, the circuit breaker can monitor the operating status in real time, realize fault warning, remote control and other functions, and improve the reliability and operation efficiency of the power system.

[0038] In order to ensure accurate control of the circuit breaker, high-precision sensor acquisition technology is used. By installing sensors at key locations, the temperature, pressure, current and other parameters of the circuit breaker are monitored in real time, and the data is transmitted to the control system for analysis and processing. These high-precision data provide an important basis for circuit breaker status assessment and fault diagnosis.

[0039] Sealing performance is the key to the stable operation of the circuit breaker. We use advanced sealing technology and materials to ensure the sealing of key parts such as vacuum interrupters and disconnectors. At the same time, through strict sealing testing and quality control, we ensure that the performance of the circuit breaker will not be affected by sealing problems during operation.

[0040] In order to ensure the safety of personnel and equipment, the circuit breaker has adopted a number of safety and explosion-proof measures. First, through reasonable structural design, the pressure wave generated when the internal explosion occurs is prevented from affecting the outside. Secondly, high-performance explosion-proof materials are used to improve the explosion resistance of the equipment. In addition, safety valves and other devices are also set up to quickly release internal pressure in the event of abnormal conditions to prevent accidents.

[0041] In order to reduce operation and maintenance costs and improve equipment reliability, the ZW68-12 vacuum circuit breaker has a maintenance-free function. By optimizing the structural design, selecting long-life materials, and using advanced lubrication technology, the circuit breaker does not require frequent maintenance and replacement of parts during operation, thereby reducing manpower and time costs.

[0042] Therefore, the utility model adopts the above-mentioned 12kV primary fusion type environmentally friendly intelligent circuit breaker, which has the advantages of high reliability, long life, environmental protection, high performance, primary fusion miniaturization, intelligence and easy installation and maintenance. It plays an important role in the power system. It not only improves the operating efficiency and safety of the power system, but also promotes the green, low-carbon and sustainable development of the power system.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.

Claims

1. A 12kV primary fusion type environmentally friendly intelligent circuit breaker, characterized in that: It includes a bracket, a sealed shell and two groups of incoming bushings and outgoing bushings arranged on the top of the sealed shell, the outgoing bushings are located at the bottom of the incoming bushings, the outgoing bushings on one side are connected to the isolation knife switch structure through conductive contacts, conductive arms and insulating brackets, and the outgoing bushings on the other side are connected to the vacuum interrupter structure through a sensor module and a conductive arm, and the vacuum interrupter structure is connected to the isolation knife switch structure through an interlocking device.

2. A 12kV primary fusion type environmentally friendly intelligent circuit breaker according to claim 1, characterized in that: The isolating knife switch structure includes an isolating knife switch static contact, which is connected to the second crank arm through the isolating knife switch moving contact, and the second crank arm is respectively connected to the isolating knife switch closing spring and one end of the interlocking device through the isolating knife switch three-phase drive shaft.

3. A 12kV primary fusion type environmentally friendly intelligent circuit breaker according to claim 2, characterized in that: The vacuum arc chamber structure includes a vacuum arc chamber, one end of the vacuum arc chamber is connected to a vacuum arc chamber static contact conductive arm, the vacuum arc chamber static contact conductive arm is connected to the second crank arm through a conductive flexible connection, the other end of the vacuum arc chamber is connected to an insulating pull rod, the insulating pull rod is connected to the other end of the interlocking device through a three-phase drive shaft and the first crank arm.

4. The 12kV primary fusion type environmentally friendly intelligent circuit breaker according to claim 1 is characterized in that: The sensor module includes a voltage signal sensor and a current signal sensor, and the voltage signal sensor and the current signal sensor are both located in the outlet bushing on the other side.

5. The 12kV primary fusion type environmentally friendly intelligent circuit breaker according to claim 1 is characterized in that: Micro-pressure nitrogen / air is arranged at the top end of the sealed housing.

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