Three-break vacuum circuit breaker

Abstract

The utility model provides a three-break vacuum circuit breaker, which comprises a vacuum circuit breaker body, the vacuum circuit breaker body comprises a mounting rack, the front end of the mounting rack is provided with a plurality of vacuum poles, the tops of the plurality of vacuum poles are provided with upper isolation static contacts, the bottom of the mounting rack is provided with a plurality of sensors, and the upper isolation static contacts are provided with upper isolation static contacts. The plurality of sensors are all provided with lower isolation static contacts, the tops of the plurality of vacuum poles are all rotatably provided with upper isolation knives, and the bottoms of the plurality of vacuum poles are all rotatably provided with lower isolation knives. The upper isolation device, the lower isolation device and the vacuum circuit breaker are designed into a whole, namely visible fractures are arranged in front of and behind the vacuum circuit breaker, and the upper isolation device, the lower isolation device and the vacuum circuit breaker are interlocked, so that a short-circuit fault of a power supply line can be effectively cut off, electric equipment is prevented from being damaged, personnel safety is guaranteed, and the vacuum circuit breaker has the advantages of compact structure, small size, high safety, high reliability, low material cost and the like. The installation and the use are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum circuit breakers, in particular to a three-break vacuum circuit breaker. Background Art

[0002] "Vacuum circuit breaker" is named because its arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are both high vacuum; it has the advantages of small size, light weight, suitable for frequent operation, and arc extinguishing without maintenance, and is widely used in distribution networks. Vacuum circuit breaker is an indoor power distribution device in 3~10kV, 50Hz three-phase AC system. It can be used for protection and control of electrical equipment in industrial and mining enterprises, power plants, and substations. It is particularly suitable for use in places that require oil-free, less maintenance and frequent operation. The circuit breaker can be configured in a central cabinet, double-layer cabinet, and fixed cabinet to control and protect high-voltage electrical equipment. The existing vacuum circuit breaker adopts a split structure between the upper and lower isolation and the vacuum circuit breaker, which makes it impossible to quickly cut off the short-circuit fault of the power supply line, resulting in a slow response speed of the equipment, and it is impossible to more effectively protect the electrical equipment from damage and the personal safety of the staff; and the split structure results in a large volume and occupies more space; Utility Model Content

[0003] The utility model provides a three-break vacuum circuit breaker to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A three-break vacuum circuit breaker comprises a vacuum circuit breaker body, wherein the vacuum circuit breaker body comprises a mounting frame, a plurality of vacuum poles are arranged at the front end of the mounting frame, upper isolating static contacts are arranged on the tops of the plurality of vacuum poles, a plurality of sensors are arranged at the bottom of the mounting frame, lower isolating static contacts are arranged on the plurality of sensors, upper isolating knives are rotatably arranged on the tops of the plurality of vacuum poles, lower isolating knives are rotatably arranged on the bottoms of the plurality of vacuum poles, a first rotating shaft is rotatably arranged on the top of the mounting frame, a second rotating shaft is arranged at the bottom of the mounting frame, a third rotating shaft is arranged at the bottom of the second rotating shaft, a plurality of upper insulating pull rods are rotatably arranged on the first rotating shaft, a plurality of lower insulating pull rods are rotatably arranged on the third rotating shaft, a plurality of the upper insulating pull rods are rotatably connected to the plurality of the upper isolating knives, a plurality of the lower insulating pull rods are rotatably connected to the plurality of the lower isolating knives, a first crank arm is arranged at one end of the first rotating shaft, a second crank arm is arranged at one end of the second rotating shaft, and a transmission rod is movably arranged between the first crank arm and the second crank arm.

[0006] Preferably, an operating mechanism is provided on one side of the mounting frame.

[0007] Preferably, one end of the transmission rod is rotatably connected to the first crank arm, and the other end of the transmission rod is rotatably connected to the second crank arm.

[0008] Beneficial Effects

[0009] The above one or more technical solutions in a three-break vacuum circuit breaker provided by the embodiment of the utility model have at least one of the following technical effects:

[0010] The utility model adopts the above technical scheme to provide a three-break vacuum circuit breaker. The upper and lower isolations are designed as a whole with the vacuum circuit breaker, that is, there are visible breaks at the front and rear of the circuit breaker, and the three are interlocked with each other, so that the operation is more convenient and quick, and the speed is faster during disconnection and closing, and the short circuit fault of the power supply line can be quickly and effectively cut off to ensure that the electrical equipment is not damaged and the safety of personnel is protected. The utility model has the advantages of compact structure, small size, high safety, high reliability, low material cost, and easy installation and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0012] Figure 2 This is a left side structural schematic diagram of the utility model;

[0013] Figure 3 It is a schematic diagram of the structure of the utility model from the right side;

[0014] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0015] 1. Vacuum circuit breaker body; 2. Mounting frame; 3. Vacuum pole; 4. Upper isolating static contact; 5. Sensor; 6. Lower isolating static contact; 7. Upper isolating knife; 8. Lower isolating knife; 9. First rotating shaft; 10. Second rotating shaft; 11. Third rotating shaft; 12. Upper insulating pull rod; 13. Lower insulating pull rod; 14. First crank arm; 15. Second crank arm; 16. Transmission rod; 17. Operating mechanism. DETAILED DESCRIPTION

[0016] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0018] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] like Figure 1-3 As shown, it is a structural schematic diagram of a three-break vacuum circuit breaker in a preferred embodiment of the utility model;

[0020] In this embodiment, a vacuum circuit breaker body 1 is included, and the vacuum circuit breaker body 1 includes a mounting frame 2. Three vacuum poles 3 are arranged at equal intervals at the front end of the mounting frame 2. Upper isolating static contacts 4 are arranged on the tops of the three vacuum poles 3. Three sensors 5 are arranged at equal intervals at the bottom of the mounting frame 2. Lower isolating static contacts 6 are arranged on the three sensors 5. Upper isolating knives 7 are rotatably provided on the tops of the three vacuum poles 3. Lower isolating knives 8 are rotatably provided on the bottoms of the three vacuum poles 3. A first rotating shaft 9 is rotatably provided on the top of the mounting frame 2. A second rotating shaft 10 is provided at the bottom of the mounting frame 2. A third rotating shaft 11 is provided at the bottom of the second rotating shaft 10. Three upper insulating pull rods 12 are rotatably provided on the first rotating shaft 9 and are arranged at equal intervals. Three lower insulating pull rods 13 are rotatably provided on the third rotating shaft 11 and are arranged at equal intervals. The upper insulating pull rod 12 is rotatably connected to the three upper isolating knives 7 respectively, and the three lower insulating pull rods 13 are rotatably connected to the three lower isolating knives 8 respectively. A first crank arm 14 is fixedly provided at one end of the first rotating shaft 9, and a second crank arm 15 is fixedly provided at one end of the second rotating shaft 10. A transmission rod 16 is movably provided between the first crank arm 14 and the second crank arm 15. The second crank arm 15 is driven to rotate by rotating the second rotating shaft 10, and the second crank arm 15 rotates and pushes the first crank arm 14, so that the first crank arm 14 drives the first rotating shaft 9 to rotate, so that the upper insulating pull rod 12 pulls or pushes the upper isolating knife 7 to complete the isolation and disconnection action of the upper part of the vacuum circuit breaker body 1; the lower insulating pull rod 13 is driven by rotating the third rotating shaft 11, so that the lower insulating pull rod 13 pulls or pushes the lower isolating knife 8 to complete the isolation and disconnection action of the lower part of the vacuum circuit breaker body 1.

[0021] In this embodiment, an operating mechanism 17 is provided on one side of the mounting frame 2, and the operating mechanism is used to operate the vacuum circuit breaker body (this mechanism is a prior art, and therefore, it will not be described in detail in this specification).

[0022] In this embodiment, one end of the transmission rod 16 is rotationally connected to the first crank arm 14, and the other end of the transmission rod 16 is rotationally connected to the second crank arm 15. When the second crank arm 15 rotates, it pushes the transmission rod 16 to move, so that the transmission rod 16 pushes the first crank arm 14 to rotate, and vice versa.

[0023] The three-break vacuum circuit breaker of the utility model has common mechanical installation, connection or setting methods, which can be implemented as long as they can achieve beneficial effects.

[0024] Technologies not described in detail in the present invention are all well-known technologies. Those skilled in the art can easily implement the present invention based on understanding this specification, and the contents shown in the drawings are part of this specification.

[0025] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A three-break vacuum circuit breaker, comprising a vacuum circuit breaker body (1), characterized in that: The vacuum circuit breaker body (1) comprises a mounting frame (2), a plurality of vacuum poles (3) are provided at the front end of the mounting frame (2), upper isolating static contacts (4) are provided at the tops of the plurality of vacuum poles (3), a plurality of sensors (5) are provided at the bottom of the mounting frame (2), lower isolating static contacts (6) are provided on the plurality of sensors (5), upper isolating knives (7) are rotatably provided at the tops of the plurality of vacuum poles (3), lower isolating knives (8) are rotatably provided at the bottoms of the plurality of vacuum poles (3), a first rotating shaft (9) is rotatably provided at the top of the mounting frame (2), a second rotating shaft (10) is provided at the bottom of the mounting frame (2), and the first isolating knives (7) are rotatably provided at the tops of the plurality of vacuum poles (3). A third rotating shaft (11) is provided at the bottom of the second rotating shaft (10); a plurality of upper insulating pull rods (12) are rotatably provided on the first rotating shaft (9); a plurality of lower insulating pull rods (13) are rotatably provided on the third rotating shaft (11); the plurality of upper insulating pull rods (12) are rotatably connected to the plurality of upper isolating knives (7); the plurality of lower insulating pull rods (13) are rotatably connected to the plurality of lower isolating knives (8); a first crank arm (14) is provided at one end of the first rotating shaft (9); a second crank arm (15) is provided at one end of the second rotating shaft (10); a transmission rod (16) is movably provided between the first crank arm (14) and the second crank arm (15).

2. A three-break vacuum circuit breaker according to claim 1, characterized in that: An operating mechanism (17) is provided on one side of the mounting frame (2).

3. A three-break vacuum circuit breaker according to claim 1, characterized in that: One end of the transmission rod (16) is rotatably connected to the first crank arm (14), and the other end of the transmission rod (16) is rotatably connected to the second crank arm (15).

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