A vertical rotation type vacuum circuit breaker

Abstract

The present invention discloses a longitudinally rotating vacuum circuit breaker, which includes a rotating bracket rotatably connected to a mechanism box; three vacuum bubble rotating brackets are longitudinally connected to the rotating bracket in sequence from front to back; a vacuum bubble is arranged inside the vacuum bubble rotating bracket, and upper isolation moving contact lifting assemblies and lower isolation moving contact lifting assemblies for connecting finger contact assemblies are arranged at both ends of the vacuum bubble rotating bracket; a link transmission mechanism for controlling the closing and opening of the vacuum bubble is arranged inside the rotating bracket; a transmission mechanism for controlling the lifting of the upper isolation moving contact lifting assembly and the lower isolation moving contact lifting assembly is arranged on the side of the rotating bracket. Through the specially designed integrated bracket structure, the rotation radius is reduced, and through the link transmission mechanism integrated in the rotating bracket, the volume of the entire circuit breaker is reduced. Through the cylindrical upper isolation moving contact and lower isolation moving contact being electrically connected to the finger contact assembly, the service life of the upper isolation moving contact and the lower isolation moving contact is effectively increased, and the safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and particularly to a longitudinally rotating vacuum circuit breaker. Background Art

[0002] The longitudinally rotating circuit breaker in the prior art adopts a structure in which a circuit breaker is combined with three-phase pole columns. During operation, the circuit breaker can be opened and closed with load, and the three-phase pole columns are used to achieve no-load closing or tripping. Since the circuit breaker needs to be equipped with a separate power device to achieve its rapid tripping and closing, and the three-phase pole columns also need to reserve a certain space for operation, the volume of the entire disconnector is large and the structure is relatively complex.

[0003] The moving contacts provided at the ends of the isolating knives of the longitudinally rotating circuit breaker in the prior art all adopt a duckbill-shaped sliding structure to access the main circuit. For example, the patent with the authorization announcement number CN101178989B discloses a longitudinally rotating functional composite vacuum disconnector, and the spoon-shaped contact structure disclosed therein is widely used in longitudinally rotating circuit breakers. This structure has a short service life. Due to the limitation of the contact structure, the withdrawable switchgear using such contacts cannot achieve a large rated current due to the temperature rise problem and cannot be serialized. At the same time, the three-phase pole columns in the longitudinally rotating circuit breaker in the prior art are usually arranged on the side of the rotating shaft, which will cause an increase in the rotation radius, increase the volume of the switchgear cabinet, and the rotating shaft made of metal structure will also increase the interval space between the three-phase pole columns, further increasing the volume of the switchgear cabinet.

[0004] In view of this, there is a need in the prior art for a circuit breaker with a smaller volume, a longer service life, higher safety and a simpler structure. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the above prior art and provide a longitudinally rotating vacuum circuit breaker with a compact structure, a long service life, a high safety factor and a simple structure.

[0006] The present invention is achieved as follows:

[0007] A longitudinally rotating vacuum circuit breaker includes a rotating bracket rotatably connected to a mechanism box; three vacuum bubble rotating brackets are longitudinally connected to the rotating bracket in sequence from front to back; a vacuum bubble is provided in the vacuum bubble rotating bracket, and it is characterized in that: upper and lower isolating moving contact lifting assemblies for connecting finger assemblies are provided at both ends of the vacuum bubble rotating bracket; a link transmission mechanism for controlling the closing and opening of the vacuum bubble is provided in the rotating bracket; and a transmission mechanism for controlling the lifting of the upper and lower isolating moving contact lifting assemblies is provided on the side of the rotating bracket.

[0008] Furthermore, both the rotating bracket and the vacuum bubble rotating bracket are hollow structures; the rotating bracket and the vacuum bubble rotating bracket are integrally formed insulating brackets; the central axis of the vacuum bubble rotating bracket is perpendicular to and intersects with the central axis of the rotating bracket.

[0009] Furthermore, the vacuum bubble rotating bracket penetrates through the rotating bracket; the distances between the two ends of the vacuum bubble rotating bracket located at both ends of the rotating bracket are not equal.

[0010] Furthermore, the upper isolating moving contact lifting assembly includes an upper conductive cylinder fixedly sealed to the upper end of the vacuum bubble rotating bracket; an upper isolating moving contact is movably connected inside the upper conductive cylinder; the lower isolating moving contact lifting assembly includes a lower conductive cylinder fixedly sealed to the lower end of the vacuum bubble rotating bracket; a lower isolating moving contact is movably connected inside the lower conductive cylinder.

[0011] Furthermore, the connecting rod transmission mechanism includes a crank arm hinged inside the rotating bracket and a connecting rod axially slidable inside the rotating bracket; holes one and two are respectively provided at both ends of the crank arm; hole one is rotationally connected to the vacuum bubble conductive cylinder through a vacuum bubble driving pin; hole two is rotationally connected to the connecting rod through a connecting rod pin.

[0012] Furthermore, the axial left - right movement of the connecting rod is controlled by a mechanism box.

[0013] Furthermore, the transmission mechanism includes a power shaft connected to the mechanism box; the power shaft is arranged parallel to the rotating bracket; a transmission bevel gear is provided at the position opposite to the vacuum bubble rotating bracket on the power shaft; the upper transmission shaft and the lower transmission shaft are engaged with the upper and lower ends of the transmission bevel gear respectively; the upper transmission shaft is connected to the upper isolating moving contact lifting assembly; the lower transmission shaft is connected to the lower isolating moving contact lifting assembly.

[0014] Furthermore, a driving tooth is provided at the end of the upper transmission shaft; the driving tooth is engaged with a driving member through a plurality of connecting gears; the central shaft part of the driving member is threadedly connected to the upper isolating moving contact inside the upper isolating moving contact lifting assembly for driving the upper isolating moving contact to move up and down.

[0015] Furthermore, a driving tooth is provided at the end of the lower transmission shaft; the driving tooth is engaged with a driving member through a plurality of connecting gears; the central shaft part of the driving member is threadedly connected to the lower isolating moving contact inside the lower isolating moving contact lifting assembly for driving the lower isolating moving contact to move up and down.

[0016] Furthermore, two connecting gears are provided.

[0017] The beneficial effects of the present invention are as follows: Through the specially designed integrated bracket structure, the volume is reduced and the rotation radius is decreased. Through the link transmission mechanism integrated in the rotating bracket, the volume of the entire circuit breaker is greatly reduced. At the same time, a linear structure design of the main circuit is achieved, that is, the two-end double isolation, the vacuum bubble, and the vacuum bubble conductive cylinder are all located on the same straight line, further reducing the volume of the circuit breaker.

[0018] At the same time, through the electrical connection of the cylindrical upper isolation moving contact and the lower isolation moving contact with the finger assembly, the service life of the upper isolation moving contact and the lower isolation moving contact can be effectively increased, and the safety can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 Schematic diagram of the structure of the vertical rotation type vacuum circuit breaker of the present invention;

[0021] Figure 2 Enlarged view of part A of the present invention;

[0022] Figure 3 Schematic diagram of the partial structure of the vertical rotation type vacuum circuit breaker of the present invention;

[0023] Figure 4 Schematic diagram of the structure of the link transmission mechanism of the present invention;

[0024] Figure 5 Schematic diagram of the transmission mechanism of the present invention; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Embodiment 1:

[0029] As Figures 1-5 shown, a vertical rotation type vacuum circuit breaker includes a rotating bracket 1 rotatably connected to a mechanism box; three vacuum bubble rotating brackets 2 are longitudinally connected to the rotating bracket 1 in the front-rear order; a vacuum bubble 3 is provided in the vacuum bubble rotating bracket 2, and it is characterized in that: upper isolation moving contact lifting assemblies 5 and lower isolation moving contact lifting assemblies 6 for connecting finger contact assemblies 4 are provided at both ends of the vacuum bubble rotating bracket 2; a link transmission mechanism 7 for controlling the closing and opening of the vacuum bubble 3 is provided in the rotating bracket 1; a transmission mechanism 8 for controlling the lifting of the upper isolation moving contact lifting assembly 5 and the lower isolation moving contact lifting assembly 6 is provided on the side of the rotating bracket 1.

[0030] In an embodiment of the present invention, both the rotating bracket 1 and the vacuum bulb rotating bracket 2 are hollow structures; the rotating bracket 1 and the vacuum bulb rotating bracket 2 are integrally formed insulating brackets; the central axis of the vacuum bulb rotating bracket 2 is perpendicular to and intersects the central axis of the rotating bracket 1. In an embodiment of the present invention, the vacuum bulb rotating bracket 2 penetrates through the rotating bracket 1; the distances between the two ends of the vacuum bulb rotating bracket 2 located at the two ends of the rotating bracket 1 are not equal. During actual installation, since the volume of the link transmission mechanism 7 for controlling the closing and opening of the vacuum bulb 3 can be made relatively small, most of the vacuum bulb rotating bracket 2 is located on one side of the rotating bracket 1, and only a space for installing the lower isolating moving contact lifting assembly 6 is reserved on the opposite side penetrating the rotating bracket 1, or the lower isolating moving contact lifting assembly 6 can be directly arranged at the position opposite to the vacuum bulb rotating bracket 2 on the rotating bracket 1, which can better reduce the volume and facilitate the overall arrangement of the link transmission mechanism 7 inside the rotating bracket 1, and quickly realize the rapid closing and opening of the vacuum bulb 3 through the axial left and right movement of the link 72.

[0031] In an embodiment of the present invention, the upper isolating moving contact lifting assembly 5 includes an upper conductive cylinder 51 fixedly sealed to the upper end of the vacuum bulb rotating bracket 2; an upper isolating moving contact 52 is movably connected inside the upper conductive cylinder 51; the lower isolating moving contact lifting assembly 6 includes a lower conductive cylinder 61 fixedly sealed to the lower end of the vacuum bulb rotating bracket 2; a lower isolating moving contact 62 is movably connected inside the lower conductive cylinder 61. Both the upper isolating moving contact 52 and the lower isolating moving contact 62 are cylindrical, and internal threads are provided inside them, and the internal threads match the external threads of the central shaft part of the driving member 833. When the driving member 833 rotates, it drives the upper isolating moving contact 52 and the lower isolating moving contact 62 to move up and down to complete the electrical connection with the main circuit.

[0032] In an embodiment of the present invention, the link transmission mechanism 7 includes a crank arm 71 hinged inside the rotating bracket 1 and a link 72 axially slidable arranged inside the rotating bracket 1; holes one 73 and two 74 are respectively provided at both ends of the crank arm 71; the hole one 73 is rotatably connected to the vacuum bulb conductive cylinder 76 through a vacuum bulb driving pin 75; the hole two 74 is rotatably connected to the link 72 through a link pin 77. In order to reduce the friction between the hole one 73 and the vacuum bulb driving pin 75, and between the hole two 74 and the link pin 77, and convert the friction between them into rolling friction, the hole one 73 and the hole two 74 are waist-shaped holes.

[0033] In an embodiment of the present invention, the axial left and right movement of the link 72 is controlled by a mechanism box.

[0034] In an embodiment of the present invention, the transmission mechanism 8 includes a power shaft 81 connected to the mechanism box; the power shaft 81 is arranged parallel to the rotary bracket 1; a transmission bevel gear 82 is provided at a position on the power shaft 81 opposite to the vacuum bubble rotary bracket 2; the upper transmission shaft 83 and the lower transmission shaft 84 are engaged with the upper and lower ends of the transmission bevel gear 82 respectively; the upper transmission shaft 83 is connected to the upper isolating moving contact lifting assembly 5; the lower transmission shaft 84 is connected to the lower isolating moving contact lifting assembly 6.

[0035] In an embodiment of the present invention, a driving tooth 831 is provided at the end of the upper transmission shaft 83; the driving tooth 831 is engaged with a driving member 833 through a plurality of connecting gears 832; the central shaft portion of the driving member 833 is threadedly connected to the upper isolating moving contact 52 in the upper isolating moving contact lifting assembly 5 for driving the upper isolating moving contact 52 to move up and down.

[0036] In an embodiment of the present invention, a driving tooth 831 is provided at the end of the lower transmission shaft 84; the driving tooth 831 is engaged with a driving member 833 through a plurality of connecting gears 832; the central shaft portion of the driving member 833 is threadedly connected to the lower isolating moving contact 62 in the lower isolating moving contact lifting assembly 6 for driving the lower isolating moving contact 62 to move up and down.

[0037] In an embodiment of the present invention, two connecting gears 832 are provided.

[0038] Working principle: The rotary bracket 1 is controlled to rotate by the mechanism box. When the rotary bracket 1 rotates by a certain angle such that the finger assembly 4 and the upper isolating moving contact lifting assembly 5 are not in a relative position, the circuit breaker is in the double-isolation open state and the entire main circuit is not connected. When it rotates to a certain angle such that the finger assembly 4 and the upper isolating moving contact lifting assembly 5 are opposite to each other, the mechanism box controls the power shaft 81 to rotate, so that the upper transmission shaft 83 and the lower transmission shaft 84 further drive the driving member 833 to rotate, and finally the upper isolating moving contact 52 and the lower isolating moving contact 62 are connected to the finger assembly to be incorporated into the main circuit; the closing and opening actions of the vacuum bubble 3 are completed by the link transmission mechanism 7 located in the rotary bracket 1. The link 72 in the link transmission mechanism 7 axially moves left and right in the rotary bracket 1 under the control of the mechanism box. As Figure 4 shown, when the link 72 moves to the right, the link 72 drives the crank arm 71 to rotate, so that the vacuum bubble conducting cylinder 76 moves downward to complete the opening action of the vacuum bubble. On the contrary, when the link 72 moves to the left, the link 72 drives the crank arm 71 to rotate, so that the vacuum bubble conducting cylinder 76 moves upward to complete the closing action of the vacuum bubble.

[0039] Through the specially designed integrated bracket structure, the volume of the present invention is reduced and the rotation radius is decreased. Through the connecting rod transmission mechanism integrated in the rotating bracket, the volume of the entire circuit breaker is greatly reduced. At the same time, a linear structure design of the main circuit is realized, that is, both ends of the double isolation, the vacuum interrupter, and the vacuum interrupter conducting cylinder are located on the same straight line, further reducing the volume of the circuit breaker.

[0040] Meanwhile, the cylindrical upper isolating moving contact and the lower isolating moving contact are electrically connected to the finger assembly, which can effectively increase the service life of the upper isolating moving contact and the lower isolating moving contact and improve safety.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vertical rotation type vacuum circuit breaker, comprising a rotating bracket (1) rotatably connected to a mechanism box; three vacuum bubble rotating brackets (2) are longitudinally connected to the rotating bracket (1) in a front-to-back sequence; a vacuum bubble (3) is arranged inside the vacuum bubble rotating bracket (2), and it is characterized in that: Both ends of the vacuum bubble rotating bracket (2) are provided with an upper isolating moving contact lifting assembly (5) and a lower isolating moving contact lifting assembly (6) for connecting the finger contact assembly (4); a connecting rod transmission mechanism (7) for controlling the closing and opening of the vacuum bubble (3) is arranged inside the rotating bracket (1); a transmission mechanism (8) for controlling the lifting of the upper isolating moving contact lifting assembly (5) and the lower isolating moving contact lifting assembly (6) is arranged on the side of the rotating bracket (1); the vacuum bubble rotating bracket (2) penetrates through the rotating bracket (1).

2. The vertical rotary vacuum circuit breaker according to claim 1, characterized in that: Both the rotating bracket (1) and the vacuum bubble rotating bracket (2) are of hollow structures; the rotating bracket (1) and the vacuum bubble rotating bracket (2) are integrally formed insulating brackets; the central axis of the vacuum bubble rotating bracket (2) is perpendicular to and intersects with the central axis of the rotating bracket (1).

3. The vertical rotary vacuum circuit breaker according to claim 2, wherein: The distances between the vacuum bubble rotating bracket (2) and the two ends of the rotating bracket (1) are not equal.

4. A vertical rotation type vacuum circuit breaker according to claim 1, characterized in that: The upper isolating moving contact lifting assembly (5) includes an upper conductive cylinder (51) fixedly sealed with the upper end of the vacuum bubble rotating bracket (2); an upper isolating moving contact (52) is movably connected inside the upper conductive cylinder (51); the lower isolating moving contact lifting assembly (6) includes a lower conductive cylinder (61) fixedly sealed with the lower end of the vacuum bubble rotating bracket (2); a lower isolating moving contact (62) is movably connected inside the lower conductive cylinder (61).

5. The vertical rotary vacuum circuit breaker according to claim 1, characterized in that: The connecting rod transmission mechanism (7) includes a crank arm (71) hinged inside the rotating bracket (1) and an axially slidable connecting rod (72) arranged inside the rotating bracket (1); holes one (73) and two (74) are respectively arranged at both ends of the crank arm (71); the hole one (73) is rotatably connected with a vacuum bubble conductive cylinder (76) through a vacuum bubble driving pin (75); the hole two (74) is rotatably connected with the connecting rod (72) through a connecting rod pin (77).

6. The vertical rotary vacuum circuit breaker according to claim 5, characterized in that: The axial left and right movement of the connecting rod (72) is controlled by a mechanism box.

7. A vertical rotary vacuum circuit breaker according to claim 1, characterized in that: The transmission mechanism (8) includes a power shaft (81) connected to the mechanism box; the power shaft (81) is arranged parallel to the rotating bracket (1); a transmission bevel gear (82) is arranged on the power shaft (81) opposite to the vacuum bubble rotating bracket (2); an upper transmission shaft (83) and a lower transmission shaft (84) are engaged with the upper and lower ends of the transmission bevel gear (82) respectively; the upper transmission shaft (83) is connected to the upper isolating moving contact lifting assembly (5); the lower transmission shaft (84) is connected to the lower isolating moving contact lifting assembly (6).

8. A vertical rotary vacuum circuit breaker according to claim 7, characterized in that: A driving tooth (831) is arranged at the end of the upper transmission shaft (83); the driving tooth (831) is engaged with a driving member (833) through a plurality of connecting gears (832); the central shaft part of the driving member (833) is threadedly connected with the upper isolating moving contact (52) inside the upper isolating moving contact lifting assembly (5) for driving the upper isolating moving contact (52) to move up and down.

9. The vertical rotary vacuum circuit breaker according to claim 7, characterized in that: The end of the lower transmission shaft (84) is provided with a driving gear (831); the driving gear (831) is engaged with a driving member (833) through a plurality of connecting gears (832); the central shaft portion of the driving member (833) is threadedly connected to a lower isolating moving contact (62) in the lower isolating moving contact lifting assembly (6) for driving the lower isolating moving contact (62) to move up and down.

10. A vertical rotary vacuum circuit breaker according to claim 8 or 9, characterized in that: Two connecting gears (832) are provided.

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