Quick breaking vacuum arc-extinguishing chamber

Abstract

The utility model discloses a quick breaking vacuum arc-extinguishing chamber, which comprises a vacuum arc-extinguishing chamber and a breaking auxiliary mechanism, a static contact is arranged at the bottom in the vacuum arc-extinguishing chamber, a moving contact is movably arranged at the top in the vacuum arc-extinguishing chamber, a driving rod is screwed at the top of the moving contact, and the breaking auxiliary mechanism comprises a fixed seat and a connecting sleeve. A plurality of supporting rods are evenly distributed on the top of the fixing base along the axis, first hinge blocks are arranged on the inner sides of the tops of the supporting rods, a plurality of second hinge blocks are evenly distributed on the outer diameter surface of the connecting sleeve along the axis, a boosting push rod is movably arranged between the first hinge blocks and the second hinge blocks, the fixing base sleeves the top of the vacuum arc-extinguishing chamber, and the connecting sleeve sleeves the driving rod. According to the utility model, the breaking speed of the vacuum arc-extinguishing chamber can be accelerated through the breaking auxiliary mechanism, so that the performance of the circuit breaker can be effectively improved, the possibility of arc reignition is reduced, the ablation of the surface of the push contact is reduced, the service life of the vacuum arc-extinguishing chamber is prolonged, the arc-extinguishing capability is improved, and the insulating strength of a system is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum interrupter chambers, in particular to a fast-breaking vacuum interrupter chamber. Background Art

[0002] Vacuum interrupters are widely used in medium and high voltage circuit breakers. They extinguish arcs by exploiting the high dielectric strength of a vacuum and the difficulty maintaining an arc. Their operating principle is that when the contacts separate, the arc is quickly extinguished because there are no freely moving ions in a vacuum to sustain the arc.

[0003] If the vacuum interrupter's disconnection speed is too slow, the arc between the contacts may not be extinguished in time, leading to reignition. This reignition not only damages the contacts but can also generate high voltage, causing equipment explosion or other safety hazards. Furthermore, the presence of the arc erodes the contact surface. If the disconnection speed is slow, the arc-contact time increases, further exacerbating contact erosion. This not only reduces the vacuum interrupter's service life but can also lead to poor contact between the contacts, affecting the normal operation of the equipment. Furthermore, in certain situations where rapid power outages are required, such as protecting sensitive equipment or preventing the spread of a fault, slow disconnection speeds can increase the circuit's opening time, delaying protection and increasing the risk of equipment damage. Utility Model Content

[0004] The utility model provides a fast-breaking vacuum interrupter to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A vacuum interrupter with rapid disconnection comprises a vacuum interrupter and an auxiliary disconnecting mechanism, wherein a static contact is provided at the bottom of the vacuum interrupter, a moving contact is movably provided at the top of the vacuum interrupter, a driving rod is screwed on the top of the moving contact, and the auxiliary disconnecting mechanism comprises a fixing seat and a connecting sleeve, a plurality of support rods are evenly distributed along the axis on the top of the fixing seat, a hinge block 1 is provided on the inner side of the top of the plurality of support rods, a plurality of hinge blocks 2 are evenly distributed along the axis on the outer diameter surface of the connecting sleeve, a power-assisting push rod is movably provided between the hinge block 1 and the hinge block 2, the fixing seat is sleeved on the top of the vacuum interrupter, and the connecting sleeve is sleeved on the driving rod.

[0007] Preferably, the power push rod includes a telescopic rod 1 and a telescopic rod 2 movably connected to the first telescopic rod, and springs are sleeved on the telescopic rod 1 and the telescopic rod 2.

[0008] Preferably, the telescopic rod 1 is hinged to the hinge block 1, and the telescopic rod 2 is hinged to the hinge block 2.

[0009] Beneficial effects

[0010] The above one or more technical solutions in the fast-breaking vacuum interrupter provided by the embodiment of the utility model have at least one of the following technical effects:

[0011] The utility model adopts the above technical scheme to provide an auxiliary disconnection mechanism for the vacuum interrupter. When the vacuum interrupter is disconnected, the driving rod drives the moving contact to move upward, and the connecting sleeve moves upward along with the driving rod. The initial states of the several assisting push rods are all inclined downward. When the connecting sleeve moves upward, the several assisting push rods simultaneously rotate upward and contract to accumulate elastic force. When the connecting sleeve continues to move upward so that the states of the several assisting push rods all become inclined upward, the several assisting push rods will simultaneously release the elastic force accumulated during contraction. The elastic forces released by the several assisting push rods act on the driving rod at the same time, thereby providing an upward assisting force for the driving rod, thereby accelerating the disconnection speed between the moving contact and the static contact, thereby effectively improving the performance of the circuit breaker, including reducing the possibility of arc reignition, reducing the residence time of the arc on the contact surface, reducing the ablation of the push contact surface, and improving the service life of the vacuum interrupter, improving the arc extinguishing capability and enhancing the insulation strength of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the disconnection auxiliary mechanism of the utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the utility model in operation state;

[0016] The corresponding relationship between the illustration labels and component names in the figure is as follows:

[0017] 1. Vacuum interrupter; 2. Auxiliary breaking mechanism; 3. Static contact; 4. Moving contact; 5. Driving rod; 6. Fixed seat; 7. Connecting sleeve; 8. Support rod; 9. Articulated block 1; 10. Articulated block 2; 11. Power push rod; 12. Telescopic rod 1; 13. Telescopic rod 2; 14. Spring. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] 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, and do not indicate or imply 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.

[0020] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0021] like Figure 1-4 As shown, it is a structural schematic diagram of a fast-breaking vacuum interrupter in a preferred embodiment of the present invention;

[0022] In this embodiment, it includes a vacuum interrupter 1 and a disconnecting auxiliary mechanism 2. A static contact 3 is fixed at the bottom of the vacuum interrupter 1 by screws. A moving contact 4 is movably provided at the top of the vacuum interrupter 1. The moving contact 4 can move up and down linearly. A driving rod 5 is screwed on the top of the moving contact 4. The disconnecting auxiliary mechanism 2 includes a fixed seat 6 and a connecting sleeve 7. A plurality of support rods 8 are evenly distributed along the axis on the top of the fixed seat 6. The support rods 8 are arranged at equal intervals. A hinge block 9 is integrally provided on the inner side of the top of the support rods 8. A plurality of hinge blocks 10 are evenly distributed along the axis on the outer diameter surface of the connecting sleeve 7. The plurality of hinge blocks 10 are arranged at equal intervals. A power-assisting push rod 11 is movably provided between the hinge block 9 and the hinge block 2 10. The fixed seat 6 is sleeved and fixed on the top of the vacuum interrupter 1. The connecting sleeve 7 is sleeved and fixed on the driving rod 5.

[0023] In this embodiment, the power push rod 11 includes a telescopic rod 12 and a telescopic rod 2 13 movably connected to the first telescopic rod 12. The telescopic rod 2 13 can be retracted into the telescopic rod 12. A spring 14 is provided on the telescopic rod 12 and the telescopic rod 2 13. The spring 14 cooperates with the telescopic rod 12 and the telescopic rod 2 13 to provide elastic thrust for the connecting sleeve 7.

[0024] In this embodiment, the telescopic rod 12 is hinged to the hinge block 1 9, and the telescopic rod 2 13 is hinged to the hinge block 2 10. Through this structure, the telescopic rod 12 and the hinge block 1 9 are rotationally connected, and the telescopic rod 2 13 and the hinge block 2 10 are rotationally connected.

[0025] Principle of this utility model:

[0026] The vacuum interrupter 1 is provided with assistance for disconnection through the disconnection auxiliary mechanism 2. When the vacuum interrupter 1 is disconnected, the driving rod 5 drives the moving contact 4 to move upward, and the connecting sleeve 7 moves upward together with the driving rod 5. The initial state of several assist push rods 11 is tilted downward. When the connecting sleeve 7 moves upward, several assist push rods 11 rotate upward at the same time and contract to accumulate elastic force. When the connecting sleeve 7 continues to move upward so that the states of several assist push rods 11 become tilted upward, then several assist push rods 11 will simultaneously release the elastic force accumulated during contraction. The elastic force released by several assist push rods 11 acts on the driving rod 5 at the same time, thereby providing an upward assist force for the driving rod 5, thereby speeding up the disconnection speed between the moving contact 4 and the static contact 3.

[0027] The utility model provides a fast-breaking vacuum interrupter, and its installation method, connection method or setting method are all common mechanical methods, and any method that can achieve its beneficial effects can be implemented.

[0028] 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.

[0029] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. A fast-breaking vacuum interrupter, characterized by: The invention comprises a vacuum interrupter (1) and a disconnection auxiliary mechanism (2), wherein a static contact (3) is provided at the bottom of the vacuum interrupter (1), a moving contact (4) is movably provided at the top of the vacuum interrupter (1), a driving rod (5) is screwed on the top of the moving contact (4), and the disconnection auxiliary mechanism (2) comprises a fixing seat (6) and a connecting sleeve (7), a plurality of support rods (8) are evenly distributed along the axis at the top of the fixing seat (6), a hinge block (9) is provided on the inner side of the top of the plurality of support rods (8), a plurality of hinge blocks (10) are evenly distributed along the axis on the outer diameter surface of the connecting sleeve (7), a booster push rod (11) is movably provided between the hinge block (9) and the hinge block (10), the fixing seat (6) is sleeved on the top of the vacuum interrupter (1), and the connecting sleeve (7) is sleeved on the driving rod (5).

2. A fast-breaking vacuum interrupter according to claim 1, characterized in that: The booster push rod (11) comprises a telescopic rod 1 (12) and a telescopic rod 2 (13) movably connected to the first telescopic rod (12), and a spring (14) is sleeved on the telescopic rod 1 (12) and the telescopic rod 2 (13).

3. A fast-breaking vacuum interrupter according to claim 2, characterized in that: The telescopic rod 1 (12) is hinged to the hinge block 1 (9), and the telescopic rod 2 (13) is hinged to the hinge block 2 (10).

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