CN215644288U - Permanent magnet type indoor high-voltage vacuum circuit breaker - Google Patents

Abstract

The utility model discloses a permanent magnet type indoor high-voltage vacuum circuit breaker, which comprises a ceramic shell, a moving contact, a static contact and a shielding cover, wherein the moving contact, the static contact and the shielding cover are arranged in the ceramic shell; the static contact comprises a conductive plate which is contacted with the moving contact, the other surface of the conductive plate is connected with a guide sleeve, a static conductive rod is slidably arranged in the guide sleeve, one end of the static conductive rod is provided with a limiting plate, a reset piece is sleeved on the static conductive rod, one end of the reset piece is connected with the limiting plate, and the other end of the reset piece is connected with the guide sleeve; when the moving contact is inconsistent with the static contact, the conducting plate can move downwards along the static conducting rod to buffer the impact force of the moving contact on the static contact, and the impact resistance is further improved, so that the service life of the moving contact and the static contact is prolonged. In addition, the conducting plate can slide along the static conducting rod, so that the upper surface of the conducting plate and the lower surface of the moving contact can keep surface-to-surface contact in any state, and the capacity of cutting off electric arcs is improved.

Description

Permanent magnet type indoor high-voltage vacuum circuit breaker

Technical Field

The utility model relates to the technical field of power switch equipment, in particular to a permanent magnet type indoor high-voltage vacuum circuit breaker.

Background

The vacuum arc-extinguishing chamber is generally composed of a moving contact, a static contact, a metal shielding cover, a splash line pipe and a sealed container formed by a ceramic ring, the moving contact and the static contact are contacted and separated through the action of a mechanism, and the corrugated pipe is welded with the moving contact and a flange of the sealed container, so that the vacuum degree in the container is not influenced when the moving contact moves axially. The vacuum arc extinguish chamber has the advantages of strong breaking capacity, no exposure of electric arc, allowance of frequent operation and the like, and is suitable for the live on-off operation of various types of vacuum switches. When a moving contact of the vacuum arc extinguish chamber performs a closing action, the moving contact has high action speed, high impact force and high vibration and is a main factor for causing the damage of the vacuum arc extinguish chamber.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a permanent magnet type indoor high-voltage vacuum circuit breaker to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: a permanent magnet type indoor high-voltage vacuum circuit breaker comprises a ceramic shell, a moving contact, a static contact and a shielding cover, wherein the moving contact, the static contact and the shielding cover are installed in the ceramic shell; the moving contact is fixed in the ceramic shell through a moving end cover plate; the static contact comprises a conductive plate which is contacted with the moving contact, and the other surface of the conductive plate is connected with a guide sleeve; a static conductive rod is slidably mounted in the guide sleeve, and a limiting plate is arranged at one end of the static conductive rod; a reset piece is further sleeved on the static conductive rod, one end of the reset piece is connected with the limiting plate, and the other end of the reset piece is connected with the inner bottom surface of the guide sleeve; when the reset piece is in a free state, a gap exists between the limiting plate and the conductive plate.

As a preferred technical scheme of the utility model: one end of the guide sleeve, which is far away from the current-conducting plate, is provided with a furling part; wherein the static conductive rod slides in the furling part.

As a preferred technical scheme of the utility model: the moving contact comprises a moving conducting rod, and the moving conducting rod penetrates through the moving end cover plate and then is connected with a shaft pin rod.

As a preferred technical scheme of the utility model: the movable conducting rod is further sleeved with a supporting piece, one end of the supporting piece is abutted to the shaft pin rod, and the other end of the supporting piece is abutted to the movable end cover plate.

As a preferred technical scheme of the utility model: the piece that resets with support piece is the spring.

By adopting the technical scheme, the utility model has the beneficial effects that: when the moving contact is inconsistent with the static contact, the conducting plate can move downwards along the static conducting rod to buffer the impact force of the moving contact on the static contact, and the impact resistance is further improved, so that the service life of the moving contact and the static contact is prolonged. In addition, the conducting plate can slide along the static conducting rod, so that the upper surface of the conducting plate and the lower surface of the moving contact can keep surface-to-surface contact in any state, the capability of cutting off electric arcs is improved, and the problem that two contacts are ablated when the moving contact is in non-planar contact with the static contact is solved.

Drawings

FIG. 1 is a schematic cross-sectional view of a main body structure of the present invention;

fig. 2 is a schematic cross-sectional structure diagram of a static contact according to the present invention.

In the figure: 1. a ceramic shell; 2. a moving contact; 3. a shield case; 4. static contact; 5. a conductive plate; 6. a limiting plate; 7. a reset member; 8. a guide sleeve; 9. a gathering part; 10. a static conductive rod; 11. a movable conductive rod; 12. a support member; 13. a movable end cover plate; 14. an axle pin rod.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "upper surface", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in 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 orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The ceramic shell 1 of the device and the rest of the structure inside the ceramic shell 1 are the same as the prior art, and the utility model is not shown and described in more detail, and the difference between the utility model and the prior art is mainly described below.

Referring to fig. 1-2, an embodiment of the present invention is shown: a permanent magnet type indoor high-voltage vacuum circuit breaker comprises a ceramic shell 1, a moving contact 2, a static contact 4 and a shielding cover 3, wherein the moving contact 2, the static contact 4 and the shielding cover are installed in the ceramic shell 1; the moving contact 2 is fixed in the ceramic shell 1 through a moving end cover plate 13; the static contact 4 comprises a conductive plate 5 which is contacted with the moving contact 2, and the other surface of the conductive plate 5 is connected with a guide sleeve 8; a static conductive rod 10 is slidably mounted inside the guide sleeve 8, and a limiting plate 6 is arranged at one end of the static conductive rod 10; a reset piece 7 is further sleeved on the static conductive rod 10, one end of the reset piece 7 is connected with the limiting plate 6, and the other end of the reset piece 7 is connected with the inner bottom surface of the guide sleeve 8; when the reset piece 7 is in a free state, a gap exists between the limiting plate 6 and the conductive plate 5.

Through the mode, the conducting plate 5 can move downwards when being impacted, and the conducting plate 5 can slide downwards stably under the action of the static conducting rod 10, so that the problem that the conducting plate 5 is impacted, the conducting plate 5 inclines on a horizontal plane to cause that the conducting plate 5 and the moving contact 2 cannot be in plane contact, and the phenomenon that the two contacts are ablated by electric arcs is caused is effectively solved.

Based on this, the device is through buffering the impact force, and when the impact force disappears, the piece 7 that resets impels the current conducting plate 5 to contradict with moving contact 2 is stable, guarantees that current conducting plate 5 and moving contact 2 are with plane contact, so makes the life of the device obtain the extension, can also reduce the noise that produces when moving contact 2 and static contact 4 clash into simultaneously.

In addition, the reset piece 7 prompts the conducting plate 5 and the limiting plate 6 to keep a certain gap, and the gap is smaller than one centimeter in general, so that the conducting plate 5 has enough buffer space, and by the above mode, the processing length of the moving contact 2 does not need to be controlled too finely, so that the processing cost of the moving contact 2 can be reduced.

In order to further ensure that the conductive plate 5 slides downwards stably, a furled part 9 is arranged at one end of the guide sleeve 8 far away from the conductive plate 5; the static conductive rod 10 slides in the furling part 9, and the furling part 9 can guide the conductive plate 5 to only slide upwards or downwards along the static conductive rod 10, so that a gap between the conductive plate 5 and the movable contact 2 in a separation process or a gap in a closing process is completely kept consistent, and the problem that the two contacts are corroded electrically due to the fact that the conductive plate 5 is inclined is effectively solved.

In the process of supplying and transporting the existing vacuum arc-extinguishing chamber, because of the pressure difference between the inside and the outside of the vacuum arc-extinguishing chamber, the pressure difference enables the vacuum arc-extinguishing chamber to generate a self-closing force, namely, the moving contact and the static contact are in a contact closed state in a normal state, however, because of the bumpy road, the moving contact and the static contact are easy to collide to generate abrasion in the process of long-distance transportation, and the delivery quality of the vacuum arc-extinguishing chamber is influenced.

For this reason, the movable contact 2 includes a movable conductive rod 11, and the movable conductive rod 11 is connected with an axial pin 14 after passing through the movable end cover plate 13. The moving contact 2 is controlled to move downwards by the shaft pin rod 14, so that the moving contact 2 cannot collide with the static contact 4 in the transportation or installation process, the step of pulling the moving conducting rod 11 is simplified, the workload is reduced, and the delivery quality is ensured.

Furthermore, a support 12 is further sleeved on the movable conducting rod 11, one end of the support 12 abuts against the shaft pin rod 14, and the other end of the support 12 abuts against the movable end cover plate 13.

In summary, the supporting member 12 can apply a counterforce towards the opening direction to the movable conducting rod 11 through the shaft pin rod 14, so that a certain distance can be kept between the movable contact 2 and the static contact 4 by selecting the supporting member 12 with a proper specification, the movable contact and the static contact are prevented from contacting with each other, collision and abrasion between the movable contact and the static contact can be avoided in the transportation process, and the delivery quality is further ensured; in particular, in this way, both the support 12 and the pivot pin 14 can be recycled, thus reducing the use costs of the device.

Furthermore, the reset member 7 and the support member 12 are both springs.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, and the scope of protection is still within the scope of the utility model.

Claims (5)

1. A permanent magnet type indoor high-voltage vacuum circuit breaker is characterized in that: the device comprises a ceramic shell (1), a moving contact (2) arranged in the ceramic shell (1), a static contact (4) and a shielding case (3);

the moving contact (2) is fixed in the ceramic shell (1) through a moving end cover plate (13);

the static contact (4) comprises a conductive plate (5) contacted with the moving contact (2), and the other surface of the conductive plate (5) is connected with a guide sleeve (8);

a static conductive rod (10) is slidably mounted inside the guide sleeve (8), and a limiting plate (6) is arranged at one end of the static conductive rod (10);

a reset piece (7) is further sleeved on the static conductive rod (10), one end of the reset piece (7) is connected with the limiting plate (6), and the other end of the reset piece (7) is connected with the inner bottom surface of the guide sleeve (8);

when the reset piece (7) is in a free state, a gap exists between the limiting plate (6) and the conductive plate (5).

2. A permanent magnet type indoor high voltage vacuum circuit breaker according to claim 1, characterized in that: a furling part (9) is arranged at one end of the guide sleeve (8) far away from the conductive plate (5); wherein the static conductive rod (10) slides in the furling part (9).

3. A permanent magnet type indoor high voltage vacuum circuit breaker according to claim 1 or 2, characterized in that: the moving contact (2) comprises a moving conducting rod (11), and the moving conducting rod (11) penetrates through the moving end cover plate (13) and then is connected with a shaft pin rod (14).

4. A permanent magnet type indoor high voltage vacuum circuit breaker according to claim 3, characterized in that: the movable conducting rod (11) is further sleeved with a supporting piece (12), one end of the supporting piece (12) is abutted to the shaft pin rod (14), and the other end of the supporting piece (12) is abutted to the movable end cover plate (13).

5. A permanent magnet type indoor high voltage vacuum circuit breaker according to claim 4, characterized in that: the reset piece (7) and the support piece (12) are both springs.

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