Detachable arc extinguish chamber for researching arc characteristics in vacuum environment

Abstract

The utility model relates to the field of arc extinguish chambers, in particular to a detachable arc extinguish chamber used for researching arc characteristics in a vacuum environment. The shell comprises a fixed shell body and a detachable shell body. A vacuum arc-extinguishing chamber driving system is arranged in the fixed shell, and a mounting plate is arranged at the top; and an insulating flange and a transition flange are sequentially connected between the mounting plate and the detachable shell. Two groups of matched electrodes are arranged in the detachable shell, a basin-type insulator is arranged at the top of the detachable shell, and observation windows are arranged on two sides of the detachable shell; one group of electrodes is mounted on the transition flange, the bottoms of the electrodes penetrate through the insulating flange and the mounting plate and are matched with a vacuum arc-extinguishing chamber driving system, and the other group of electrodes is connected with a wiring terminal through a basin-type insulator. According to the utility model, the fixed shell and the detachable shell are arranged to form the arc extinguish chamber, and the electrode can be replaced by detaching the connection position of the fixed shell and the detachable shell. By arranging the mounting plates with two sizes, the research on the pre-breakdown characteristic and the breaking characteristic of the 12kV circuit breaker and the 40.5 kV circuit breaker in a vacuum environment is realized, and the optimization method of the arc extinguish chamber structure of the circuit breaker is obtained.

Description

Technical Field

[0001] The utility model relates to the field of arc extinguishing chambers, in particular to a detachable arc extinguishing chamber used for studying arc characteristics under a vacuum environment. Background Art

[0002] For decades, sulfur hexafluoride has been selected as the insulating and arc-extinguishing medium for high-voltage switchgear. Due to its excellent comprehensive performance (high insulation performance, arc-extinguishing performance and long life), it is widely used in gas-insulated equipment such as circuit breakers, GIS and GIL. However, since sulfur hexafluoride has a relatively long atmospheric life and a high global warming potential, it is the strongest greenhouse gas so far, and its negative impact on the environment has also been criticized by people. Therefore, it is particularly important to promote SF6 gas replacement technology for power switchgear.

[0003] By combining the field operation experience of various SF6 gas replacement solutions, the environmentally friendly switchgear based on vacuum arc extinguishing technology does not produce any chemical decomposition products during the breaking process, and is an excellent alternative to the SF6 series. However, there is still a lack of in-depth research on the current switching capacity and arc characteristics under vacuum environment in China. In order to improve the convenience and efficiency of studying arc characteristics under vacuum environment, it is urgent to provide a detachable arc extinguishing chamber. Utility Model Content

[0004] In view of the problems existing in the background technology, a detachable arc extinguishing chamber for studying arc characteristics in a vacuum environment is proposed.

[0005] The utility model proposes a detachable arc extinguishing chamber for studying arc characteristics under a vacuum environment, comprising a fixed shell and a detachable shell. A vacuum arc extinguishing chamber driving system matched with a circuit breaker is arranged inside the fixed shell, and a mounting plate connected to the vacuum circuit breaker is arranged on the top; an insulating flange and a transition flange are connected between the mounting plate and the detachable shell in sequence. Two groups of matched electrodes are arranged inside the detachable shell, a pot-type insulator is arranged on the top, and observation windows opposite to the positions of the two groups of electrodes are arranged on both sides; one group of electrodes is installed on the transition flange, and the bottom passes through the insulating flange and the mounting plate, which matches with the vacuum arc extinguishing chamber driving system, and the other group of electrodes is connected to the wiring terminal through the pot-type insulator.

[0006] Preferably, the mounting plate is configured with two mounting sizes for selectively installing 12kV or 40.5kV circuit breakers.

[0007] Preferably, one end of the insert of the pot-type insulator is connected to the wiring terminal, the other end is connected to the electrode, and one side is located in a vacuum environment and the other side is located in an air environment.

[0008] Preferably, a bottom buffer seat is installed at the bottom of the vacuum interrupter driving system, and a support rod is arranged at the top.

[0009] Compared with the prior art, the utility model has the following beneficial technical effects: a fixed shell and a detachable shell are provided to form an arc extinguishing chamber. The staff can observe the arc characteristics through the observation window. When the detachable arc extinguishing chamber is replaced and adjusted, it is only necessary to remove the connection position (insulating flange and transition flange) of the fixed shell and the detachable shell to replace the internal electrode. By providing two sizes of mounting plates, the pre-breakdown characteristics and breaking characteristics of 12kV and 40.5kV circuit breakers in a vacuum environment are studied, the optimization method of the circuit breaker arc extinguishing chamber structure is obtained, and the breaking and closing performance of the vacuum circuit breaker is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic structural diagram of a detachable arc extinguishing chamber used for studying arc characteristics in a vacuum environment in the utility model.

[0011] Figure numerals: 1. Terminal block; 2. Pot insulator; 3. Electrode; 4. Removable housing; 5. Insulating flange; 6. Mounting plate; 7. Observation window; 8. Transition flange; 9. Support rod; 10. Bottom buffer seat; 11. Vacuum interrupter drive system; 12. Fixed housing. DETAILED DESCRIPTION

[0012] Embodiment 1

[0013] like Figure 1 As shown, the utility model proposes a detachable arc extinguishing chamber for studying arc characteristics in a vacuum environment, comprising a fixed housing 12 and a detachable housing 4. The fixed housing 12 is provided with a vacuum arc extinguishing chamber drive system 11 that cooperates with the circuit breaker, and a mounting plate 6 connected to the vacuum circuit breaker is provided on the top; the mounting plate 6 and the detachable housing 4 are connected with an insulating flange 5 and a transition flange 8 in sequence. The detachable housing 4 can achieve a vacuum degree of 10 during the test. -4 -10 -5 Pa, two groups of matching electrodes 3 are arranged inside, a pot-type insulator 2 is arranged on the top, and observation windows 7 are arranged on both sides opposite to the two groups of electrodes 3. The observation window 7 can directly observe the arc state, and the arc occurrence, development and extinction process can be photographed at high speed through the optical glass. One group of electrodes 3 is installed on the transition flange 8, and the bottom passes through the insulating flange 5 and the mounting plate 6, which cooperates with the vacuum arc chamber drive system 11, and the other group of electrodes 3 is connected to the terminal 1 through the pot-type insulator 2. When working, the high voltage is introduced into the corresponding electrode 3 through the terminal 1 and the pot-type insulator 2. Then, the opening and closing of the two groups of electrodes 3 are realized by operating the vacuum arc chamber drive system 11. The staff can observe the arc characteristics through the observation window 7. When the detachable arc chamber is replaced and adjusted, it only needs to remove the connection position of the fixed shell 12 and the detachable shell 4 to replace the internal electrode 3.

[0014] Embodiment 2

[0015] like Figure 1 As shown, the utility model proposes a detachable arc extinguishing chamber for studying arc characteristics in a vacuum environment, comprising a fixed housing 12 and a detachable housing 4. The fixed housing 12 is provided with a vacuum arc extinguishing chamber drive system 11 that cooperates with the circuit breaker, and a mounting plate 6 connected to the vacuum circuit breaker is provided on the top; the mounting plate 6 and the detachable housing 4 are connected with an insulating flange 5 and a transition flange 8 in sequence. The detachable housing 4 can achieve a vacuum degree of 10 during the test. -4 -10 -5 Pa, two groups of matched electrodes 3 are arranged inside, a pot-type insulator 2 is arranged on the top, and observation windows 7 are arranged on both sides opposite to the two groups of electrodes 3. The observation windows 7 can directly observe the arc state, and the arc generation, development and extinction process can be photographed at high speed through the optical glass. One group of electrodes 3 is installed on the transition flange 8, and the bottom passes through the insulating flange 5 and the mounting plate 6, and cooperates with the vacuum interrupter driving system 11, and the other group of electrodes 3 is connected to the terminal 1 through the pot-type insulator 2.

[0016] It should be further explained that the mounting plate 6 is configured with two mounting sizes, and 12kV or 40.5kV circuit breakers can be selectively installed to study the pre-breakdown characteristics and breaking characteristics of 12kV and 40.5kV circuit breakers in a vacuum environment, obtain the optimization method of the arc extinguishing chamber structure of the circuit breaker, and improve the breaking and closing performance of the vacuum circuit breaker.

[0017] It should be further explained that one end of the insert of the pot-type insulator 2 is connected to the terminal 1 and the other end is connected to the electrode 3, which serves as the introduction end of the test voltage. At the same time, one side is located in a vacuum environment and the other side is located in an air environment, which ensures that no flashover or discharge occurs under a voltage of 40.5 kV.

[0018] It should be further explained that a bottom buffer seat 10 is installed at the bottom of the vacuum interrupter driving system 11, and a support rod 9 is arranged at the top, which can effectively reduce the impact force when the mechanism is in motion.

[0019] The working principle of the utility model is as follows: first, the high voltage is introduced into the corresponding electrode 3 through the terminal 1 and the pot insulator 2. Then, the opening and closing of the two groups of electrodes 3 are realized by operating the vacuum arc chamber drive system 11. The staff can observe the arc characteristics through the observation window 7. When the detachable arc chamber is replaced and adjusted, it is only necessary to remove the connection position (insulating flange 5 and transition flange 8) of the fixed shell 12 and the detachable shell 4 to replace the internal electrode 3. By setting two sizes of mounting plates 6, the pre-breakdown characteristics and breaking characteristics of 12kV and 40.5kV circuit breakers in a vacuum environment are studied, the optimization method of the circuit breaker arc chamber structure is obtained, and the breaking and closing performance of the vacuum circuit breaker is improved.

[0020] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A detachable arc extinguishing chamber for studying arc characteristics in a vacuum environment, characterized in that: It comprises a fixed housing (12) and a detachable housing (4); A vacuum interrupter driving system (11) matched with the circuit breaker is arranged inside the fixed housing (12), and a mounting plate (6) connected to the vacuum circuit breaker is arranged on the top; an insulating flange (5) and a transition flange (8) are connected in sequence between the mounting plate (6) and the detachable housing (4); Two groups of matched electrodes (3) are arranged inside the detachable housing (4), a pot-type insulator (2) is arranged on the top, and observation windows (7) are arranged on both sides and are opposite to the two groups of electrodes (3); one group of electrodes (3) is installed on a transition flange (8), the bottom of which passes through an insulating flange (5) and a mounting plate (6) and cooperates with a vacuum interrupter driving system (11), and the other group of electrodes (3) is connected to a wiring terminal (1) through the pot-type insulator (2).

2. A detachable arc extinguishing chamber for studying arc characteristics in a vacuum environment according to claim 1, characterized in that: The mounting plate (6) is configured with two mounting sizes, and a 12kV or 40.5kV circuit breaker can be selectively mounted.

3. The detachable arc extinguishing chamber for studying arc characteristics in a vacuum environment according to claim 1, characterized in that: One end of the insert of the pot-type insulator (2) is connected to the wiring terminal (1), and the other end is connected to the electrode (3), and one side is located in a vacuum environment and the other side is located in an air environment.

4. The detachable arc extinguishing chamber for studying arc characteristics in a vacuum environment according to claim 1, characterized in that: A bottom buffer seat (10) is installed at the bottom of the vacuum interrupter driving system (11), and a support rod (9) is arranged at the top.

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