Outdoor vacuum circuit breaker

Abstract

The utility model provides an outdoor vacuum circuit breaker, which relates to the technical field of vacuum circuit breakers and comprises a circuit breaker main body, a rotating shaft is arranged on the side surface of the circuit breaker main body in a penetrating manner, fixing seats are fixedly mounted on two sides of the circuit breaker main body, and a bottom sealing plate is arranged at the lower end of the circuit breaker main body. A fixing support is fixedly installed on the inner surface of the circuit breaker body, a fixing screw is arranged on the surface of the bottom sealing plate in a penetrating mode, a sealing ring is arranged on the outer side of the fixing screw in a sleeving mode, a rotating part of the circuit breaker is matched with a flange through a rotating shaft, and nitrile rubber is used as an O-shaped sealing ring on the outer side of the rotating shaft. In addition, a step groove is formed in the surface of the fixing support, so that the sealing ring can be positioned, water vapor can be prevented from entering the circuit breaker shell, the bottom sealing plate is fixed in a mode of fixing screws and threaded holes, and the sealing ring can be prevented from entering the circuit breaker shell. And the water vapor is further prevented from entering the circuit breaker shell.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum circuit breakers, in particular to an outdoor vacuum circuit breaker. Background Art

[0002] At present, the ZW32 outdoor vacuum circuit breaker is small in size, light in weight, with a reasonable design structure and stable and reliable electrical performance. It is widely used in power grid projects at all levels and is well recognized by users. However, due to the design problems of its own mechanical structure, the protection level of the switch can only reach IP65. In the southern region and the eastern coastal areas, due to the high humidity and large temperature difference between morning and evening, condensation will form inside the circuit breaker, reducing the insulation performance of the circuit breaker. In severe cases, it will cause the circuit breaker to trip and affect the safety of the power grid. As a result, users can only choose fully enclosed common box circuit breakers, but they are large in size, relatively bulky, inconvenient for on-site installation, and also increase the user's cost. Utility Model Content

[0003] The purpose of the utility model is to solve the technical problems raised in the above background technology.

[0004] The utility model adopts the following technical scheme: an outdoor vacuum circuit breaker, comprising a circuit breaker body, a rotating shaft is penetrated through the side surface of the circuit breaker body, fixing seats are fixedly installed on both sides of the circuit breaker body, a bottom sealing plate is arranged at the lower end of the circuit breaker body, a fixing bracket is fixedly installed on the inner surface of the circuit breaker body, a fixing screw is penetrated through the surface of the bottom sealing plate, a sealing ring is sleeved on the outer side of the fixing screw, a flange is fixedly installed on the side of the circuit breaker body, and an O-ring is sleeved on the outer surface of the rotating shaft.

[0005] Preferably, a step groove is provided on the inner surface of the fixing bracket, and the width of the sealing ring is smaller than the width of the step groove. Here, the step groove can locate the position of the sealing ring.

[0006] Preferably, the sealing ring is located between the bottom sealing plate and the fixed bracket. Here, the sealing performance between the bottom sealing plate and the fixed bracket is further improved.

[0007] Preferably, the rotating shaft is located inside the flange, an annular groove is formed on the outer surface of the rotating shaft, and the O-type sealing ring fits in the annular groove. Here, the O-type sealing ring can be sleeved on the outer side of the rotating shaft through the annular groove.

[0008] Preferably, the material of the O-ring is nitrile rubber. Here, the elasticity of the nitrile rubber can make up the gap between the shaft and the flange.

[0009] Preferably, a threaded hole is provided on the surface of the fixing bracket, and the fixing screw is adapted to the threaded hole. Here, the fixing screw can be screwed into the threaded hole.

[0010] Compared with the prior art, the advantages and positive effects of the utility model are:

[0011] In the utility model, the overlapping surface of the circuit breaker housing is fixed by welding to ensure the sealing of the overlapping surface of the housing. The rotating part of the circuit breaker adopts a rotating shaft and a flange to cooperate, and nitrile rubber is used as an O-ring on the outer side of the rotating shaft to make up for the gap between the rotating shaft and the flange, while ensuring the rotation flexibility of the rotating shaft and the flange. In addition, a step groove is arranged on the surface of the fixed bracket, which can not only position the sealing ring, but also prevent water vapor from entering the interior of the circuit breaker housing, and the bottom sealing plate is fixed by fixing screws and threaded holes to further prevent water vapor from entering the interior of the circuit breaker housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model provides an overall structural schematic diagram of an outdoor vacuum circuit breaker;

[0013] Figure 2 The utility model provides a side cross-sectional view of the central shaft position of an outdoor vacuum circuit breaker;

[0014] Figure 3 The utility model proposes an outdoor vacuum circuit breaker Figure 2 A magnified image of point A;

[0015] Figure 4 The utility model provides a side cross-sectional view of the bottom sealing plate position of an outdoor vacuum circuit breaker;

[0016] Figure 5 The utility model proposes an outdoor vacuum circuit breaker Figure 4 Enlarged view of point B.

[0017] Legend:

[0018] 1. Circuit breaker body; 2. Rotating shaft; 3. Fixed seat; 4. Bottom sealing plate; 5. Fixed bracket; 6. Fixing screws; 7. Sealing ring; 8. Flange; 9. O-ring. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0021] Embodiment 1

[0022] See also Figure 1-5 The utility model provides a technical solution: an outdoor vacuum circuit breaker, comprising a circuit breaker body 1, a rotating shaft 2 is penetrated on the side surface of the circuit breaker body 1, a fixing seat 3 is fixedly installed on both sides of the circuit breaker body 1, a bottom sealing plate 4 is arranged at the lower end of the circuit breaker body 1, a fixing bracket 5 is fixedly installed on the inner surface of the circuit breaker body 1, a fixing screw 6 is penetrated on the surface of the bottom sealing plate 4, a sealing ring 7 is sleeved on the outer side of the fixing screw 6, a flange 8 is fixedly installed on the side of the circuit breaker body 1, and an O-ring 9 is sleeved on the outer surface of the rotating shaft 2.

[0023] See also Figure 1-5 A step groove is provided on the inner surface of the fixed bracket 5, and the step groove is used to determine the position of the sealing ring 7. The width of the sealing ring 7 is smaller than the width of the step groove. The sealing ring 7 is located between the bottom sealing plate 4 and the fixed bracket 5. The rotating shaft 2 is located on the inner side of the flange 8. An annular groove is provided on the outer surface of the rotating shaft 2. The annular groove allows the O-ring 9 to be installed on the outer side of the rotating shaft 2. The O-ring 9 fits in the annular groove. The material of the O-ring 9 is nitrile rubber. A threaded hole is provided on the surface of the fixed bracket 5, and the fixing screw 6 is adapted to the threaded hole. When the fixing screw 6 is adapted to the threaded hole, the fixing screw 6 can be screwed into the threaded hole.

[0024] Working principle: First, the O-ring 9 can be sleeved on the rotating shaft 2, and the rotating shaft 2 and the flange 8 cooperate with each other. The O-ring 9 is used to fill the gap between the rotating shaft 2 and the flange 8. Under the condition of ensuring sealing, the rotating shaft 2 is more flexible when rotating. The bottom sealing plate 4 can be installed on the bottom of the circuit breaker body 1 through the use of fixing screws 6 and fixing brackets 5. A sealing ring 7 is arranged between the fixing bracket 5 and the fixing screws 6 to prevent water vapor from entering the inside of the circuit breaker.

[0025] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An outdoor vacuum circuit breaker, comprising a circuit breaker body (1), characterized in that: A rotating shaft (2) is provided through the side surface of the circuit breaker body (1), a fixing seat (3) is fixedly installed on both sides of the circuit breaker body (1), a bottom sealing plate (4) is provided at the lower end of the circuit breaker body (1), a fixing bracket (5) is fixedly installed on the inner surface of the circuit breaker body (1), a fixing screw (6) is provided through the surface of the bottom sealing plate (4), a sealing ring (7) is sleeved on the outer side of the fixing screw (6), a flange (8) is fixedly installed on the side of the circuit breaker body (1), and an O-ring (9) is sleeved on the outer surface of the rotating shaft (2).

2. The outdoor vacuum circuit breaker according to claim 1, characterized in that: The inner surface of the fixing bracket (5) is provided with a step groove, and the width of the sealing ring (7) is smaller than the width of the step groove.

3. The outdoor vacuum circuit breaker according to claim 1, characterized in that: The sealing ring (7) is located between the bottom sealing plate (4) and the fixed bracket (5).

4. The outdoor vacuum circuit breaker according to claim 1, characterized in that: The rotating shaft (2) is located on the inner side of the flange (8), and an annular groove is provided on the outer surface of the rotating shaft (2), and the O-type sealing ring (9) fits in the annular groove.

5. The outdoor vacuum circuit breaker according to claim 1, characterized in that: The material of the O-type sealing ring (9) is nitrile rubber.

6. The outdoor vacuum circuit breaker according to claim 1, characterized in that: A threaded hole is provided on the surface of the fixing bracket (5), and the fixing screw (6) is adapted to the threaded hole.

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