CN219497702U - Switching-on mechanism of direct current breaker - Google Patents
Switching-on mechanism of direct current breaker Download PDFInfo
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- CN219497702U CN219497702U CN202320781568.6U CN202320781568U CN219497702U CN 219497702 U CN219497702 U CN 219497702U CN 202320781568 U CN202320781568 U CN 202320781568U CN 219497702 U CN219497702 U CN 219497702U
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- connecting rod
- hinged
- moving contact
- copper bar
- direct current
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Abstract
The utility model relates to a switching-on mechanism of a direct current breaker, which comprises a breaker shell, wherein a motor is arranged on the breaker shell, an output shaft of the motor is connected with a push block through a thread structure, the push block slides in the breaker shell, the right end of the push block is hinged with the left end of a first connecting rod, the right end of the first connecting rod is hinged with the middle part of a limiting piece, the middle part of the limiting piece is hinged with the left end of a second connecting rod, the right end of the second connecting rod is hinged with the lower end of a third connecting rod, the upper end of the third connecting rod is hinged with the middle part of a moving contact bracket, the upper end of the moving contact bracket is fixedly connected with the upper end of a moving contact, the moving contact is positioned on the left side of a fixed contact, and contacts are arranged on the opposite surfaces of the two sides; the fixed contact is connected with the lead-in end copper bar, and the lower end of the moving contact is connected with the lead-out end copper bar. The utility model has simple structure and is convenient for maintenance; combines the functions of a mechanical switch and a power electronic switch. The defect of the traditional mechanical switch is avoided, and the mechanical switch is more stable and reliable.
Description
Technical Field
The utility model belongs to the technical field of circuit breakers, and relates to a switching mechanism of a direct current circuit breaker.
Background
In recent years, with the vigorous development of urban rail industry, the performance and technical characteristics of the control and protection device of the conventional subway direct current traction power supply system can not completely meet all requirements of subway operation. The existing breaker adopted in the high-voltage direct-current engineering adopts a mechanical structure, and the degree of automation is not high.
Disclosure of Invention
The utility model aims to provide a closing mechanism of a direct current breaker, which can solve the problems and is more stable and reliable.
According to the technical scheme provided by the utility model: the switching-on mechanism of the direct current breaker comprises a breaker shell, a motor is arranged on the breaker shell, an output shaft of the motor is connected with a push block through a thread structure, the push block slides in the breaker shell, the right end of the push block is hinged with the left end of a first connecting rod, the right end of the first connecting rod is hinged with the middle part of a limiting piece, the middle part of the limiting piece is hinged with the left end of a second connecting rod, the right end of the second connecting rod is hinged with the lower end of a third connecting rod, the upper end of the third connecting rod is hinged with the middle part of a moving contact support, the upper end of the moving contact support is fixedly connected with the upper end of the moving contact, the moving contact is positioned on the left side of a fixed contact, and contacts are arranged on opposite surfaces of the moving contact and the upper end of the moving contact; the fixed contact is connected with the lead-in end copper bar, and the lower end of the moving contact is connected with the lead-out end copper bar.
As a further development of the utility model, a sliding slot is provided in the circuit breaker housing, in which sliding slot the push block slides.
As a further improvement of the utility model, the right end of the push block is hinged with the left end of the first connecting rod through a pin shaft, the right end of the first connecting rod is hinged with the middle part of the limiting piece through a pin shaft, the right end of the limiting piece is hinged with the left end of the second connecting rod through a pin shaft, the right end of the second connecting rod is hinged with the lower end of the third connecting rod through a pin shaft, and the upper end of the third connecting rod is hinged with the middle part of the moving contact support through a pin shaft.
As a further improvement of the utility model, the upper end of the movable contact support is fixedly connected with the upper end of the movable contact through a screw.
As a further improvement of the utility model, the upper part of the breaker housing is provided with an arc extinguishing chamber.
As a further improvement of the utility model, the overcurrent transformer is arranged on the copper bar at the outlet end of the circuit breaker.
As a further improvement of the utility model, one end of the release is connected with the breaker shell through the base, and the other end is connected with the current transformer.
As a further improvement of the utility model, a controller is arranged on the breaker shell, and the controller is connected with the motor.
As a further improvement of the utility model, the fixed contact is connected with the copper bar at the inlet wire end through the copper bar, and the movable contact is connected with the copper bar at the outlet wire end through the copper bar.
As a further improvement of the utility model, the copper bar at the outlet end, the copper bar at the inlet end and the static contact are connected with the circuit breaker shell through bolts.
The positive progress effect of this application lies in:
the utility model has simple structure and is convenient for maintenance; combines the functions of a mechanical switch and a power electronic switch. The defect of the traditional mechanical switch is avoided, and the mechanical switch is more stable and reliable.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
In fig. 1, the device comprises an arc extinguishing chamber 1, a moving contact support 2, a controller 3, a motor 4, a first connecting rod 5, a limiting piece 6, a second connecting rod 7, a third connecting rod 8, an overcurrent transformer 9, an outgoing line end copper bar 10, a moving contact 11, an incoming line end copper bar 12, a fixed contact 13, a breaker shell 14, a push block 15 and the like.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the utility model herein. Furthermore, the terms "include" and "have," and the like, mean that other content not already listed may be "included" and "provided" in addition to those already listed in "include" and "provided; for example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements not expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Due to the drawing angle problem, some parts may not be drawn, but the positions and connection relations of the parts may be understood according to the text expression part.
As shown in fig. 1, the utility model relates to a switching-on mechanism of a direct current breaker, which comprises a breaker shell 14, wherein a motor 4 is arranged on the breaker shell 14, an output shaft of the motor 4 is connected with a push block 15 through a thread structure, the push block 15 slides in the breaker shell 14, the right end of the push block 15 is hinged with the left end of a first connecting rod 5, the right end of the first connecting rod 5 is hinged with the middle part of a limiting piece 6, the middle part of the limiting piece 6 is hinged with the left end of a second connecting rod 7, the right end of the second connecting rod 7 is hinged with the lower end of a third connecting rod 8, the upper end of the third connecting rod 8 is hinged with the middle part of a movable contact bracket 2, the upper end of the movable contact bracket 2 is fixedly connected with the upper end of a movable contact 11, the movable contact 11 is positioned on the left side of a fixed contact 13, and contacts are arranged on opposite sides of the two sides; the fixed contact 13 is connected with the wire inlet end copper bar 12, and the lower end of the movable contact 11 is connected with the wire outlet end copper bar 10.
The push block 15 is made of nylon and has elasticity, so that impact on the first connecting rod 5 is reduced. The breaker housing 14 is provided with a chute in which a push block 15 slides.
The right end of the push block 15 is hinged with the left end of the first connecting rod 5 through a pin shaft, the right end of the first connecting rod 5 is hinged with the middle part of the limiting piece 6 through a pin shaft, the middle part of the limiting piece 6 is hinged with the left end of the second connecting rod 7 through a pin shaft, the right end of the second connecting rod 7 is hinged with the lower end of the third connecting rod 8 through a pin shaft, the upper end of the third connecting rod 8 is hinged with the middle part of the moving contact support 2 through a pin shaft, and the upper end of the moving contact support 2 is fixedly connected with the upper end of the moving contact 11 through a screw.
The arc-extinguishing chamber 1 is arranged on the upper part of the circuit breaker shell 14, when a large short-circuit current occurs, electric arcs can be generated in the breaking process of the circuit breaker, and the arc-extinguishing chamber 1 can rapidly extinguish the electric arcs, so that the situation that a loop is not opened due to the fact that the electric arcs ablate the moving contact 11 and the fixed contact 13 is avoided.
The overcurrent transformer 9 is arranged on the copper bar 10 at the outlet end of the circuit breaker, and when the current transformer 9 detects the short-circuit current exceeding a set value, the tripping device 16 is controlled to trip the moving contact.
One end of the release is connected with the breaker shell 14 through the base, and the other end is connected with the current transformer 9. The bottom of the contact support 2 is driven to rotate and trip when tripping.
The breaker housing 14 is provided with a controller 3, and the controller 3 is connected with the motor 4. In the present embodiment, the controller 3 is a PLC.
The fixed contact 13 is connected with the lead-in end copper bar 12 through a copper bar, and the lower end of the moving contact 11 is connected with the lead-out end copper bar 10 through a copper bar.
The wire outlet end copper bar 10, the wire inlet end copper bar 12, the fixed contact 13 and the breaker shell 14 are connected through bolts.
The working process of the utility model is as follows:
the controller 3 controls the motor 4 to be electrified, the motor 4 pushes the push block 15 to move rightwards after being electrified, then the first connecting rod 5 rotates anticlockwise to drive the limiting piece 6 and the second connecting rod 7 to rotate anticlockwise, and the third connecting rod 8 rotates clockwise to push the moving contact support 2 and the moving contact 11 rightwards to enable the contact on the moving contact 11 to be connected with the contact on the fixed contact 13.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present utility model, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the utility model, and are also considered to be within the scope of the utility model.
Claims (10)
1. The switching-on mechanism of the direct current breaker comprises a breaker shell (14), and is characterized in that a motor (4) is installed on the breaker shell (14), an output shaft of the motor (4) is connected with a push block (15) through a threaded structure, the push block (15) slides in the breaker shell (14), the right end of the push block (15) is hinged with the left end of a first connecting rod (5), the right end of the first connecting rod (5) is hinged with the middle part of a limiting piece (6), the middle part of the limiting piece (6) is hinged with the left end of a second connecting rod (7), the right end of the second connecting rod (7) is hinged with the lower end of a third connecting rod (8), the upper end of the third connecting rod (8) is hinged with the middle part of a moving contact bracket (2), the upper end of the moving contact bracket (2) is fixedly connected with the upper end of a moving contact (11), the moving contact (11) is positioned on the left side of a fixed contact (13), and contacts are arranged on opposite sides of the moving contact bracket; the fixed contact (13) is connected with the wire inlet end copper bar (12), and the lower end of the moving contact (11) is connected with the wire outlet end copper bar (10).
2. Closing mechanism of a direct current circuit breaker according to claim 1, characterized in that a chute is provided in the circuit breaker housing (14), in which chute the push block (15) slides.
3. The switching-on mechanism of a direct current breaker according to claim 1, wherein the right end of the push block (15) is hinged to the left end of the first connecting rod (5) through a pin shaft, the right end of the first connecting rod (5) is hinged to the middle part of the limiting piece (6) through a pin shaft, the middle part of the limiting piece (6) is hinged to the left end of the second connecting rod (7) through a pin shaft, the right end of the second connecting rod (7) is hinged to the lower end of the third connecting rod (8) through a pin shaft, and the upper end of the third connecting rod (8) is hinged to the middle part of the moving contact support (2) through a pin shaft.
4. Closing mechanism of a direct current breaker according to claim 1, characterized in that the upper end of the moving contact support (2) and the upper end of the moving contact (11) are fixedly linked by means of screws.
5. Closing mechanism of a direct current circuit breaker according to claim 1, characterized in that the upper part of the circuit breaker housing (14) is provided with an arc chute (1).
6. Closing mechanism of a direct current circuit breaker according to claim 1, characterized in that the outgoing line end copper bar (10) of the circuit breaker is fitted with an overcurrent transformer (9).
7. The switching-on mechanism of a direct current circuit breaker according to claim 6, characterized in that one end of the release is connected with the circuit breaker housing (14) through a base, and the other end is connected with the current transformer (9).
8. Closing mechanism of a direct current circuit breaker according to claim 1, characterized in that the circuit breaker housing (14) is provided with a controller (3), the controller (3) being connected to the motor (4).
9. Closing mechanism of a direct current breaker according to claim 1, characterized in that the stationary contact (13) is connected to the lead-in terminal copper bar (12) by means of a copper bar, and the lower end of the moving contact (11) is connected to the lead-out terminal copper bar (10) by means of a copper bar.
10. Closing mechanism of a direct current circuit breaker according to claim 1, characterized in that the outgoing line end copper bar (10), the incoming line end copper bar (12), the stationary contact (13) are connected with the circuit breaker housing (14) by means of bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320781568.6U CN219497702U (en) | 2023-04-11 | 2023-04-11 | Switching-on mechanism of direct current breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320781568.6U CN219497702U (en) | 2023-04-11 | 2023-04-11 | Switching-on mechanism of direct current breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219497702U true CN219497702U (en) | 2023-08-08 |
Family
ID=87483172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320781568.6U Active CN219497702U (en) | 2023-04-11 | 2023-04-11 | Switching-on mechanism of direct current breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219497702U (en) |
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2023
- 2023-04-11 CN CN202320781568.6U patent/CN219497702U/en active Active
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