Anti-condensation vacuum circuit breaker on a pole

Abstract

The utility model discloses a kind of anti-condensation's post vacuum circuit breaker, belong to post vacuum circuit breaker field, the upper end edge of box is equipped with connecting frame, the upper end of connecting frame is equipped with connecting strip, the lower end of connecting strip is equipped with fixed frame, fixed frame is connected with deflector in frame groove by rotating shaft, deflector is opposite post vacuum circuit breaker body and realizes new air flow guide;The upper end of connecting strip is connected with electric push rod by mounting seat, the front end of connecting strip is connected with turnover frame by hinged seat, electric push rod is connected with turnover frame, the side wall of turnover frame is equipped with support frame, fan is installed in the frame of support frame, angle adjustment is realized by electric push rod driving fan. Turnover mechanism adjusts fan angle, flow guide mechanism optimizes new air path, blowing mechanism provides strong airflow, the synergistic effect of three, significantly improve the drying efficiency of post vacuum circuit breaker body surface condensation or frost, ensure equipment stable operation, prolong service life.

Description

Technical Field

[0001] This utility model relates to the field of pole-mounted vacuum circuit breakers, and in particular to a pole-mounted vacuum circuit breaker with anti-condensation properties. Background Technology

[0002] Pole-mounted vacuum circuit breakers are circuit breakers installed and operated on utility poles. They mainly utilize the high dielectric strength of vacuum to extinguish arcs and are now widely used in power distribution networks with voltage levels of 7, 2 to 40, and 5kV. They are suitable for protection and control in substations and industrial and mining enterprise power distribution systems.

[0003] The main structure of a pole-mounted vacuum circuit breaker includes a vacuum interrupter, a mechanism box, current transformers, voltage transformers, and disconnecting switches. The vacuum interrupter is the core component of the circuit breaker, consisting of an airtight insulating shell, a conductive system, a shielding system, contacts, and bellows. It utilizes a vacuum environment to extinguish the electric arc, thus interrupting the current. The mechanism box contains a control interface, a manual energy storage pull ring, a lifting ring, opening / closing indicators, and a manual operating handle, used for the operation and control of the circuit breaker.

[0004] Surface condensation and frosting are common problems for pole-mounted vacuum circuit breakers during use. The condensation phenomenon is mainly caused by excessive ambient temperature differences. When the surface temperature of the equipment is lower than the dew point of the ambient air, water vapor will condense on the metal parts or insulation surfaces, forming a frost layer or water droplets.

[0005] Frost forms a conductive water film on the surface of insulators, reducing creepage distance and insulation strength. Under switching overvoltage or lightning strikes, this may trigger insulator flashover, causing single-phase grounding or phase-to-phase short-circuit faults. Frost penetrating rotating parts of the operating mechanism accelerates corrosion of metal components, leading to jamming or failure to operate the circuit breaker. For example, deformation of the tripping rod may cause tripping failure, expanding the scope of the accident. In long-term frosty environments, the insulating support rod may become damp and deteriorate. When the insulation resistance of the support rod drops to a critical value, it may misjudge the performance of the vacuum interrupter, potentially indicating a vacuum leakage hazard.

[0006] Natural drying relies on the natural rise in ambient temperature to eliminate frost. In regions with large diurnal temperature variations, such as Northwest China, or in humid environments, the daily frost-thawing cycle can continue for months, causing equipment to operate with water for extended periods. During natural thawing, water droplets may flow along the insulator surface to the terminal blocks, causing secondary circuit grounding or short circuits. A substation once experienced a power outage due to condensation in the terminal box causing a malfunction in the protection device. Natural drying cannot prevent frost formation; it can only address the problem afterward. When the frost thickness exceeds 3mm, the friction of the equipment's operating mechanism increases significantly, causing the opening and closing speeds to deviate from standard values ​​and accelerating contact wear. Utility Model Content

[0007] The main objective of this invention is to provide a pole-mounted vacuum circuit breaker that prevents condensation, which can effectively solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A pole-mounted vacuum circuit breaker with anti-condensation function includes a housing, circuit breaker supports, and a pole-mounted vacuum circuit breaker body. Multiple circuit breaker supports are installed on the housing, and the pole-mounted vacuum circuit breaker body is installed on the circuit breaker supports. A connecting frame is installed on the upper edge of the housing, and a connecting strip is installed on the upper end of the connecting frame. A fixed frame is installed on the lower end of the connecting strip, and a guide plate is connected to the frame groove of the fixed frame through a rotating shaft. The guide plate is directly opposite the vacuum circuit breaker body on the column to achieve fresh air guidance. The upper end of the connecting strip is connected to an electric push rod via a mounting base, and the front end of the connecting strip is connected to a flipping frame via a hinge seat. The electric push rod is connected to the flipping frame, and a support frame is installed on the side wall of the flipping frame. A fan is installed inside the support frame. The angle is adjusted by driving the fan through the electric push rod, and the drying of condensation on the surface of the column-mounted vacuum circuit breaker is accelerated by the fan and the guide plate.

[0009] As an optional solution of this utility model, multiple circuit breaker supports are equidistantly distributed on the housing, and the connecting frame and connecting strip are installed on the housing by bolts. The top view of the connecting strip and the connecting frame is an "L" shaped design. As an optional solution of this utility model, the mounting base is installed on the connecting strip by bolts, the tail of the electric push rod is connected to the mounting base by a rotating shaft, the telescopic head of the electric push rod is connected to the hinge seat on the flipping frame, one end of the hinge seat is connected to the flipping frame, and the other end of the hinge seat is connected to the telescopic head of the electric push rod. As an optional solution of this utility model, the support frame is fixed to the side wall of the flipping frame by bolts, and a straight plate is provided inside the frame of the support frame. The straight plate has through holes, and the fan is installed on the straight plate of the support frame by bolts. As an optional solution of this utility model, the two fans are equidistantly distributed on the support frame, the through holes on the support frame are directly opposite the guide plate, and the fixed frame is fixed to the connecting strip by bolts; As an optional solution of this utility model, a plurality of the guide plates are equidistantly distributed on the fixed frame, and the two ends of the guide plates are provided with rotating shafts and connected to the fixed frame through the rotating shafts. A bearing is provided between the fixed frame and the rotating shafts.

[0010] Compared with the prior art, the present invention has the following beneficial effects: Driven by an electric push rod, the tilting frame moves the support frame and fan to achieve flexible angle adjustment. This allows the fan to be adjusted to the optimal blowing angle based on the condensation or frost on the surface of the column-mounted vacuum circuit breaker, thereby improving drying efficiency.

[0011] The deflector plate is mounted on a fixed frame via a rotating shaft and bearings, allowing it to rotate flexibly and ensuring that fresh air is smoothly guided to the surface of the column-mounted vacuum circuit breaker, optimizing airflow distribution and enhancing the drying effect.

[0012] The fan is installed inside the support frame and blows air directly onto the surface of the column-mounted vacuum circuit breaker to accelerate the drying of condensation or frost on the surface and prevent equipment failure caused by moisture accumulation.

[0013] The flipping mechanism adjusts the fan angle, the airflow guiding mechanism optimizes the fresh air path, and the blower mechanism provides a strong airflow. The three work together to significantly improve the drying efficiency of condensation or frost on the surface of the column-mounted vacuum circuit breaker, ensuring stable operation of the equipment and extending its service life. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view of the overall structure of this utility model; Figure 3 This is a top view of the overall structure of this utility model; Figure 4 The diagram shows the flipping mechanism, air guiding mechanism, and fan blowing mechanism of this utility model.

[0015] In the diagram: 1. Box housing; 2. Circuit breaker support; 3. Pole-mounted vacuum circuit breaker body; 4. Connecting frame; 5. Connecting strip; 6. Mounting base; 7. Electric push rod; 8. Tilting frame; 9. Hinge seat; 10. Support frame; 11. Fan; 12. Fixed frame; 13. Deflector plate. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] like Figure 1 - Figure 4 As shown, a pole-mounted vacuum circuit breaker with anti-condensation function includes a housing 1, circuit breaker supports 2, and a pole-mounted vacuum circuit breaker body 3. Specifically, multiple circuit breaker supports 2 are evenly and equidistantly installed inside the housing 1, while the pole-mounted vacuum circuit breaker body 3 is securely installed on each circuit breaker support 2 to ensure stable operation.

[0018] A connecting bracket 4 is carefully designed and installed on the upper edge of the housing 1. A connecting strip 5 is further connected to the upper end of the connecting bracket 4. A fixing frame 12 is installed at the lower end of the connecting strip 5. A guide plate 13 is cleverly connected to the frame groove of the fixing frame 12 via a rotating shaft. The position of the guide plate 13 is precisely adjusted so that it is directly opposite the column vacuum circuit breaker body 3, thereby achieving smooth airflow.

[0019] The upper end of the connecting strip 5 is connected to the electric push rod 7 via a mounting base 6, and the front end of the connecting strip 5 is connected to the tilting frame 8 via a hinge seat 9. One end of the electric push rod 7 is tightly connected to the tilting frame 8, and a support frame 10 is installed on the side wall of the tilting frame 8. A fan 11 is installed in the internal space of the support frame 10. Driven by the electric push rod 7, the fan 11 can achieve flexible angle adjustment, and thus, through the synergistic effect of the fan 11 and the guide plate 13, the drying speed of condensation on the surface of the column-mounted vacuum circuit breaker body 3 is accelerated.

[0020] Multiple circuit breaker supports 2 are evenly distributed on the enclosure 1 to ensure balanced stress on the overall structure. The connecting frame 4 and connecting strip 5 are firmly installed on the enclosure 1 by bolts. The top view of the connecting strip 5 and the connecting frame 4 presents an "L" shape design, which is both aesthetically pleasing and practical.

[0021] Mounting base 6 is bolted to connecting strip 5. The tail of electric push rod 7 is connected to mounting base 6 via a pivot. The telescopic head of electric push rod 7 is connected to hinge seat 9 on tilting frame 8. One end of hinge seat 9 is connected to tilting frame 8, and the other end is connected to telescopic head of electric push rod 7, ensuring the stability and flexibility of the connection.

[0022] The support frame 10 is bolted to the side wall of the tilting frame 8. A straight plate with through holes is installed inside the support frame 10. Fans 11 are bolted to the straight plate of the support frame 10. Two fans 11 are equidistantly distributed on the support frame 10, and the through holes on the support frame 10 are aligned with the guide plate 13 to ensure effective airflow guidance. The fixing frame 12 is bolted to the connecting strip 5 to ensure its positional stability.

[0023] Multiple air deflectors 13 are equidistantly distributed on the fixed frame 12. Each air deflector 13 has a rotating shaft at both ends and is connected to the fixed frame 12 via the rotating shaft. A bearing is provided between the fixed frame 12 and the rotating shaft to ensure that the air deflectors 13 can rotate flexibly, thereby optimizing the fresh air flow effect.

[0024] Multiple circuit breaker supports 2 are evenly and equidistantly installed inside the housing 1. Next, the pole-mounted vacuum circuit breaker body 3 is securely installed on each circuit breaker support 2. A connecting frame 4 is installed on the upper edge of the housing 1 and bolted securely to the housing 1. Then, a connecting strip 5 is connected to the upper end of the connecting frame 4, forming an "L" shape with the connecting frame 4 in plan view, and is also bolted in place. A fixing frame 12 is installed at the lower end of the connecting strip 5 and bolted in place. A guide plate 13 is connected to the frame groove of the fixing frame 12 via a rotating shaft, and a bearing is installed between the fixing frame 12 and the rotating shaft. A mounting base 6 is bolted to the upper end of the connecting strip 5, and the tail of the electric push rod 7 is connected to the mounting base 6 via a rotating shaft. The front end of the connecting strip 5 is connected to the tilting frame 8 via a hinge seat 9, and the telescopic head of the electric push rod 7 is connected to the hinge seat 9 on the tilting frame 8. The support frame 10 is fixed to the side wall of the tilting frame 8 with bolts. A straight plate with through holes is set inside the support frame 10. Finally, the fan 11 is installed on the straight plate of the support frame 10 with bolts, ensuring that the two fans 11 are equidistantly distributed on the support frame 10.

[0025] When the equipment is started, the electric push rod 7 begins to work, and its telescopic head drives the tilting frame 8 to move. Since the tilting frame 8 is connected to the connecting strip 5 through the hinge seat 9, and the support frame 10 is installed on the side wall of the tilting frame 8, and the fan 11 is installed inside the support frame 10, the fan 11 can be flexibly adjusted in angle. At the same time, fresh air is smoothly guided through the guide plate 13 (the guide plate 13 is installed on the fixed frame 12 through a rotating shaft and bearing, facing the column-mounted vacuum circuit breaker body 3). Under the synergistic action of the fan 11 and the guide plate 13, the drying speed of condensation on the surface of the column-mounted vacuum circuit breaker body 3 is accelerated.

[0026] When frost is detected on the surface of the pole-mounted vacuum circuit breaker body 3, the electric push rod 7 is activated. The telescopic head of the electric push rod 7 drives the tilting frame 8 to move, which in turn drives the support frame 10 to move, thereby adjusting the fan 11 to a suitable angle. The fan 11 is then turned on, and the fan blows air. The air is guided by the guide plate 13 (which can rotate flexibly on the fixed frame 12 via a shaft and bearing to optimize the airflow effect) and blows onto the surface of the pole-mounted vacuum circuit breaker body 3 to dry the frost until it is eliminated.

[0027] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pole-mounted vacuum circuit breaker with anti-condensation capability, comprising a housing (1), circuit breaker supports (2), and a pole-mounted vacuum circuit breaker body (3), wherein multiple circuit breaker supports (2) are mounted on the housing (1), and the pole-mounted vacuum circuit breaker body (3) is mounted on the circuit breaker supports (2), characterized in that: A connecting frame (4) is installed on the upper edge of the box (1), and a connecting strip (5) is installed on the upper end of the connecting frame (4). A fixed frame (12) is installed on the lower end of the connecting strip (5), and a guide plate (13) is connected to the frame groove of the fixed frame (12) through a rotating shaft. The guide plate (13) is directly opposite the vacuum circuit breaker body (3) on the column to achieve fresh air guidance. The upper end of the connecting strip (5) is connected to an electric push rod (7) via a mounting base (6), and the front end of the connecting strip (5) is connected to a flipping frame (8) via a hinge seat (9). The electric push rod (7) is connected to the flipping frame (8). A support frame (10) is installed on the side wall of the flipping frame (8), and a fan (11) is installed inside the support frame (10). The angle is adjusted by driving the fan (11) through the electric push rod (7), and the drying of condensation on the surface of the column-mounted vacuum circuit breaker body (3) is accelerated through the fan (11) and the guide plate (13).

2. The anti-condensation column vacuum circuit breaker according to claim 1, characterized in that: Multiple circuit breaker supports (2) are equidistantly distributed on the housing (1). The connecting frame (4) and connecting strip (5) are installed on the housing (1) by bolts. The top view of the connecting strip (5) and the connecting frame (4) is in the shape of an "L".

3. The anti-condensation column vacuum circuit breaker according to claim 2, characterized in that: The mounting base (6) is bolted to the connecting strip (5). The tail of the electric push rod (7) is connected to the mounting base (6) via a rotating shaft. The telescopic head of the electric push rod (7) is connected to the hinge seat (9) on the flipping frame (8). One end of the hinge seat (9) is connected to the flipping frame (8), and the other end of the hinge seat (9) is connected to the telescopic head of the electric push rod (7).

4. The anti-condensation column vacuum circuit breaker according to claim 3, characterized in that: The support frame (10) is fixed to the side wall of the flipping frame (8) by bolts. A straight plate is provided inside the frame of the support frame (10), and a through hole is provided on the straight plate. The fan (11) is installed on the straight plate of the support frame (10) by bolts.

5. The anti-condensation column vacuum circuit breaker as claimed in claim 4, wherein: The two fans (11) are equidistantly distributed on the support frame (10), the through holes on the support frame (10) are directly opposite the guide plate (13), and the fixed frame (12) is fixed to the connecting strip (5) by bolts.

6. The anti-condensation column vacuum circuit breaker according to claim 5, characterized in that: Multiple guide plates (13) are equidistantly distributed on the fixed frame (12). The two ends of the guide plates (13) are provided with rotating shafts and are connected to the fixed frame (12) through the rotating shafts. A bearing is provided between the fixed frame (12) and the rotating shaft.

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