A high voltage contact structure

Abstract

The utility model discloses a high voltage contact structure, including contact seat, contact, reinforcing rib and core, the cavity is equipped with in contact seat, and the core is hollow circular truncated cone structure and sets up in the cavity, and reinforcing rib sets up in the inside center of core, the circumferential wall of contact seat is evenly distributed with spiral groove, and the contact is bowl -like structure and covers contact seat top, and the contact surface evenly sets up inclined groove, and the end of spiral groove is connected with the first end of inclined groove. The contact of bowl -like structure is wrapped to contact seat, makes arc always ablate on contact, avoids arc to carry out ablation to contact seat, increases the core in contact seat inside simultaneously, and the core is magnetized by contact seat magnetic field when vacuum arc chamber breaks the circuit, and the magnetic field of contact seat and core two mutual superposition makes the field intensity of the utility model high voltage contact structure be strengthened, and increases the restraint ability to arc.

Description

Technical Field

[0001] This utility model relates to the field of vacuum interrupter technology, specifically to a high-voltage contact structure. Background Technology

[0002] Vacuum interrupters are mainly used in three-phase AC power distribution systems. They are electro-vacuum devices that use a pair of contacts sealed in a vacuum to connect and disconnect power circuits. When a vacuum interrupter disconnects a circuit, an electric arc is generated between the contacts, burning the contact surfaces. If the electric field strength at the contact seat is insufficient to contain the entire arc under high voltage conditions, the arc will burn onto the contact seat, causing the arc-extinguishing groove to melt and become blocked, resulting in disconnection failure. Summary of the Invention

[0003] To address the aforementioned issues, this invention provides a high-voltage contact structure that reduces the likelihood of blockage in the contact seat arc-extinguishing groove and improves the breaking capacity of the vacuum interrupter when the vacuum interrupter is interrupted under high voltage.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a high-voltage contact structure, comprising a contact base, a contact, a reinforcing rib, and an iron core. The contact base has a cavity, the iron core is a hollow frustum structure and is disposed within the cavity, the reinforcing rib is disposed at the center inside the iron core, spiral grooves are evenly distributed on the circumferential wall of the contact base, the contact is a bowl-shaped structure and covers the top of the contact base, and inclined grooves are evenly opened on the surface of the contact, the end of the spiral groove is connected to the beginning of the inclined groove.

[0005] The outer periphery of the contact is rounded, and the rounded corner is R6 to R10.

[0006] The iron core has grooves evenly distributed along its circumference.

[0007] Both the contact seat and the reinforcing rib have through holes at their centers, and the through holes of the contact seat and the reinforcing rib are on the same straight line.

[0008] The number of spiral grooves and inclined grooves is 2 to 6.

[0009] The contact is made of CuCr alloy material.

[0010] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model uses a bowl-shaped contact to wrap the contact seat, so that the electric arc always burns on the contact and avoids the electric arc burning onto the contact seat. Moreover, the contact is made of CuCr alloy material, which has strong anti-ablation ability. At the same time, an iron core is added inside the contact seat. When the circuit is interrupted in the vacuum interrupter, the iron core is magnetized by the magnetic field of the contact seat. The magnetic fields of the contact seat and the iron core are superimposed, which enhances the field strength of the high voltage contact structure of this utility model and increases the ability to restrain the electric arc. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings:

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

[0013] Figure 2 This is a schematic diagram of the contact structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the contact seat of this utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the iron core of this utility model;

[0016] In the diagram: 1. Contact seat; 2. Contact; 3. Reinforcing rib; 4. Iron core; 101. Spiral groove; 201. Inclined groove; 202. Rounded corner; 401. Iron core groove. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0018] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments. Example

[0019] like Figures 1 to 4 As shown, this utility model provides a high-voltage contact structure, including a contact base 1, a contact 2, a reinforcing rib 3, and an iron core 4. The contact base 1 has a cavity, and the iron core 4 is a hollow frustum structure disposed in the cavity. The reinforcing rib 3 is disposed in the center of the iron core 4. Spiral grooves 101 are evenly distributed on the circumferential wall of the contact base 1. The contact 2 has a bowl-shaped structure and covers the top of the contact base 1. Inclined grooves 201 are evenly opened on the surface of the contact 2. The end of the spiral groove 101 is connected to the beginning of the inclined groove 201.

[0020] The contact 2, with its bowl-shaped structure, wraps around the contact base 1, ensuring that the arc always burns on the contact 2 and preventing the arc from burning onto the contact base 1. At the same time, an iron core 4 is added inside the contact base 1. When the circuit is broken in the vacuum interrupter, the iron core 4 is magnetized by the magnetic field of the contact base 1. The magnetic fields of the contact base 1 and the iron core 4 are superimposed, which enhances the field strength of the high-voltage contact structure of this invention and increases the ability to restrain the arc.

[0021] Furthermore, a rounded corner 202 is formed on the outer periphery of the contact 2, and the rounded corner 202 is R6 to R10. The rounded corner 202 at the edge of the contact 2 structure significantly reduces the electric field concentration effect through curvature optimization, improves the distribution of the internal electric field intensity of the vacuum interrupter, and enhances the insulation stability and lifespan of the vacuum interrupter.

[0022] Furthermore, the iron core 4 has uniformly distributed iron core slots 401 along the circumferential direction. The uniformly distributed iron core slots 401 can improve the symmetry of the magnetic circuit, reduce magnetic field distortion, and enhance the ability to confine the electric arc.

[0023] Furthermore, both the contact seat 1 and the reinforcing rib 3 have through holes at their centers, and the through holes of the contact seat 1 and the reinforcing rib 3 are aligned on the same straight line. This alignment of the through holes ensures precise connection between the components, improving the stability and performance of the contact structure of this invention.

[0024] Furthermore, the number of spiral grooves 101 and inclined grooves 201 is 2 to 6. The number of spiral grooves 101 and inclined grooves 201 is reasonably selected according to the size and shape of the contact seat 1 and the contact 2, so as to ensure the breaking capacity of the vacuum interrupter.

[0025] Furthermore, the contact 2 is made of CuCr alloy material, which effectively improves the contact 2's resistance to ablation.

[0026] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. A high voltage contact structure, characterized by, The device includes a contact seat (1), a contact (2), a reinforcing rib (3), and an iron core (4). The contact seat (1) has a cavity inside. The iron core (4) is a hollow frustum structure and is located inside the cavity. The reinforcing rib (3) is located at the center inside the iron core (4). Spiral grooves (101) are evenly distributed on the circumferential wall of the contact seat (1). The contact (2) is a bowl-shaped structure and covers the top of the contact seat (1). Inclined grooves (201) are evenly opened on the surface of the contact (2). The end of the spiral groove (101) is connected to the beginning of the inclined groove (201).

2. A high voltage contact structure according to claim 1, characterized in that The outer periphery of the contact (2) is provided with a rounded corner (202), and the rounded corner (202) is R6 to R10.

3. The high-voltage contact structure according to claim 1, characterized in that, The iron core (4) has uniformly spaced iron core grooves (401) along the circumferential direction.

4. A high-voltage contact structure according to claim 1, characterized in that, Both the contact seat (1) and the reinforcing rib (3) have through holes in their centers, and the through holes of the contact seat (1) and the reinforcing rib (3) are on the same straight line.

5. A high-voltage contact structure according to claim 1, characterized in that, The number of spiral grooves (101) and inclined grooves (201) is 2 to 6.

6. A high-voltage contact structure according to claim 1, characterized in that, The contact (2) is made of CuCr alloy material.

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