Static contact assembly

Abstract

The utility model discloses a static contact assembly which comprises a static contact and a magnetic blow-out assembly installed on the static contact. The magnetic blow-out assembly comprises a support installed on the static contact, a magnetic group is installed in the support, and magnetic repulsive force generated by the magnetic group is used for blowing away electric arcs generated at the static contact. In conclusion, the magnetic blow-out assembly is arranged on the static contact, so that when the electric arc impacts the static contact, the magnetic blow-out assembly generates electromagnetic repulsive force to prevent the electric arc from directly striking the static contact, and meanwhile, the generation of the magnetic repulsive force can also push the electric arc to float, so that the direct impact of the electric arc on the static contact is further reduced, and the service life of the static contact is further prolonged. On the basis, although the equipment is simple in structure, the processing difficulty of the static contact is not increased through the simple structure, and the service life of the static contact can be effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a stationary contact assembly. Background Technology

[0002] In the existing technology, stationary contacts have a single function and are usually used in conjunction with moving contacts to complete the circuit connection or disconnection. However, electric arcs are easily generated at the moment of contact or separation between moving and stationary contacts, and stationary contacts can only withstand the impact of electric arcs. Moreover, the position of each impact of the electric arc is basically the same, which greatly shortens the service life of stationary contacts. Utility Model Content

[0003] The purpose of this invention is to provide a static contact assembly to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a stationary contact assembly, comprising a stationary contact and a magnetic blow-out assembly mounted on the stationary contact; the magnetic blow-out assembly includes a bracket mounted on the stationary contact, wherein a magnetic group is installed inside the bracket, and the magnetic repulsion force generated by the magnetic group is used to blow away the electric arc generated at the stationary contact.

[0005] As a preferred technical solution of this utility model: the magnetic assembly includes several magnetic sheets with the same structure, and each magnetic sheet is stacked and placed into the mounting area provided on the bracket.

[0006] As a preferred technical solution of this utility model: the upper surface of the magnetic sheet is provided with a slot, and the lower surface of the magnetic sheet is provided with a pin; the pin and the slot are matched and connected to realize the stacking of multiple magnetic sheets.

[0007] As a preferred technical solution of this utility model, a groove is also provided on the bottom surface of the installation area.

[0008] As a preferred technical solution of this utility model: one side of the bracket is provided with a sink groove.

[0009] As a preferred technical solution of this utility model: the other side of the bracket is also provided with an inclined surface, and after the magnetic blow assembly is connected to the stationary contact, the inclined surface contacts the supporting surface on the stationary contact.

[0010] As a preferred technical solution of this utility model: the stationary contact is further provided with a bending part, and the magnetic blow-out assembly is fixed on the stationary contact after being bent by the bending part.

[0011] The beneficial effects of this utility model by adopting the above technical solution are as follows: Since a magnetic blowing component is provided on the stationary contact, when the electric arc impacts the stationary contact, the magnetic blowing component generates an electromagnetic repulsion force, which prevents the electric arc from directly hitting the stationary contact. At the same time, the generation of the magnetic repulsion force can also drive the electric arc to drift, thereby further reducing the direct impact of the electric arc on the stationary contact and thus extending the service life of the stationary contact. Attached Figure Description

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

[0013] Figure 2 This is an exploded view of the main structure of this utility model;

[0014] Figure 3 This is an exploded structural diagram of the magnetic blowout assembly of this utility model;

[0015] Figure 4 This is a cross-sectional structural diagram of the magnetic sheet of this utility model.

[0016] In the diagram: 1. Stationary contact; 2. Bending section; 3. Magnetic blow-out assembly; 30. Bracket; 31. Mounting area; 32. Groove; 33. Bevel; 34. Sink; 35. Magnetic assembly; 36. Magnetic sheet; 37. Slot; 38. Pin; 4. Supporting surface. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "upper surface," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model.

[0018] Please see Figure 1-4This utility model provides an embodiment of a stationary contact assembly, comprising a stationary contact 1 and a magnetic blow-out assembly 3 mounted on the stationary contact 1. The magnetic blow-out assembly 3 includes a bracket 30 mounted on the stationary contact 1, and a magnetic group 35 is installed within the bracket 30. The magnetic repulsion force generated by the magnetic group 35 blows away the electric arc generated at the stationary contact 1. In summary, because the magnetic blow-out assembly 3 is provided on the stationary contact 1, when the electric arc impacts the stationary contact 1, the magnetic blow-out assembly 3 generates an electromagnetic repulsion force, preventing the electric arc from directly striking the stationary contact 1. At the same time, the generation of the magnetic repulsion force can also push the electric arc to drift, further reducing the direct impact of the electric arc on the stationary contact, thereby extending the service life of the stationary contact. Based on this, although the device has a simple structure, the simple structure not only does not increase the processing difficulty of the stationary contact 1, but also effectively extends the service life of the stationary contact 1.

[0019] Furthermore, since the magnetic assembly 35 includes several magnetic sheets 36 with identical structures, and each magnetic sheet 36 is stacked and placed in the mounting area 31 provided on the bracket 30, the magnetic sheets 36 can be stacked up and down. The magnetic assembly 35 is composed of individual magnetic sheets 36, and each magnetic sheet 36 can form an individual circuit, which promotes the generation of eddy currents by magnetic repulsion, preventing or reducing the direct impact of electric arc on the stationary contact 1. Therefore, the service life of the stationary contact 1 is extended while reducing electromagnetic losses.

[0020] Preferably, the upper surface of the magnetic sheet 36 is provided with a slot 37, and the lower surface of the magnetic sheet 36 is provided with a pin 38; the pin 38 is adapted to the slot 37 to achieve the stacking of multiple magnetic sheets 36. Specifically, the number of magnetic sheets 36 is preferably 6, so that after the magnetic sheets 36 are stacked on top of each other, the magnetic assembly 35 can work tightly and reliably, ensuring a stable output of magnetic repulsion force.

[0021] In addition, since a groove 32 is provided on the bottom surface of the mounting area 31, the pin 38 on the bottom magnetic sheet 36 of the magnetic assembly 35 can enter the mounting area 31 along the groove 32. At the same time, the groove 32 facilitates the insertion of the magnetic assembly 35 and also allows the bottom surface of the magnetic assembly 35 to fit against the bottom surface of the mounting area 31 after it enters the mounting area 31, thus improving the stability of the magnetic assembly 35 after installation. Based on this, while facilitating the smooth insertion of the magnetic assembly 35 into the mounting area 31, the groove 32 can also increase the contact area between the bracket 30 and the air, so as to facilitate the heat dissipation of the bracket 30.

[0022] Similarly, one side of the bracket 30 is provided with a groove 34, which facilitates the guidance and rapid dissipation of hot air, and also reduces the overall weight of the bracket 30.

[0023] To improve the stability of the magnetic blow-out assembly 3 after it is connected to the stationary contact 1, the stationary contact 1 is further provided with a bending portion 2. The magnetic blow-out assembly 3 is fixed to the stationary contact 1 by bending through the bending portion 2. Furthermore, since the other side of the bracket 30 is provided with an inclined surface 33, after the magnetic blow-out assembly 3 is connected to the stationary contact 1, the inclined surface 33 contacts the supporting surface 4 on the stationary contact 1, thereby further improving the stability of the magnetic blow-out assembly 3 on the stationary contact 1.

[0024] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A stationary contact assembly, characterized in that: Includes a stationary contact (1) and a magnetic blow-out assembly (3) mounted on the stationary contact (1); The magnetic blow-out assembly (3) includes a bracket (30) mounted on the stationary contact (1), a magnetic assembly (35) is installed inside the bracket (30), and the magnetic repulsion generated by the magnetic assembly (35) blows away the electric arc generated at the stationary contact (1).

2. A stationary contact assembly according to claim 1, characterized in that: The magnetic assembly (35) includes several magnetic sheets (36) with the same structure, and each magnetic sheet (36) is stacked and placed in the mounting area (31) provided on the bracket (30).

3. A stationary contact assembly according to claim 2, characterized in that: The upper surface of the magnetic sheet (36) is provided with a slot (37), and the lower surface of the magnetic sheet (36) is provided with a pin (38); the pin (38) and the slot (37) are matched and connected to realize the stacking of multiple magnetic sheets (36).

4. A stationary contact assembly according to claim 3, characterized in that: The bottom surface of the mounting area (31) is also provided with a groove (32) that cooperates with the pin (38) on the magnetic sheet (36).

5. A stationary contact assembly according to claim 1, characterized in that: One side of the support (30) is provided with a trough (34) to facilitate the flow of hot air.

6. A stationary contact assembly according to claim 5, characterized in that: The other side of the bracket (30) is also provided with a slope (33). After the magnetic blow assembly (3) is connected to the stationary contact (1), the slope (33) contacts the supporting surface (4) on the stationary contact (1).

7. A stationary contact assembly according to claim 1, characterized in that: The stationary contact (1) is also provided with a bending part (2), and the magnetic blow assembly (3) is fixed on the stationary contact (1) after being bent by the bending part (2).

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