Operating mechanism of high-voltage switch cabinet grounding switch
By employing a spur gear rack structure and limit rod in the high-voltage switchgear, the problems of high operating resistance and misoperation are solved, achieving operational balance and automatic locking, thus improving the safety and reliability of the high-voltage switchgear.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN TENGJIANG ELECTRIC MFG CO LTD
- Filing Date
- 2025-08-02
- Publication Date
- 2026-06-26
AI Technical Summary
The existing high-voltage switchgear grounding switches have high operating resistance during opening and closing, and the rotation of the operating handle lacks restraint, which can easily lead to wear or breakage of the bevel teeth. Furthermore, they cannot automatically lock after opening or closing, posing a risk of misoperation.
The gear rack structure with spur gears meshing with spur tooth surfaces, combined with first and second limit rods and elastic components, realizes the conversion of rotary motion to linear motion. Through the cooperation of the limit rods and elastic components, it ensures automatic locking after the opening and closing of the circuit breaker, reducing operating resistance and misoperation.
It effectively disperses operating torque, reduces handle operating resistance, extends component life, ensures automatic locking after opening and closing, improves operational safety and reliability, and reduces misoperation.
Smart Images
Figure CN224417655U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of high voltage switchgear technology, and in particular relates to a grounding switch operating mechanism for high voltage switchgear. Background Technology
[0002] In complete sets of high-voltage electrical switchgear, grounding switches must be operated during cabinet maintenance to ensure personal safety. However, the opening and closing of grounding switches is usually accomplished by a bevel gear mechanism. During the opening and closing of grounding switches, the operating stroke is long and the operating force is large, with the greatest force always concentrated on a single bevel gear. Long-term operation will eventually lead to wear or breakage of this gear. Due to the excessive resistance experienced by the operating handle, the operating handle is also very prone to damage.
[0003] A search revealed that CN206194564U discloses an operating device for a grounding switch in a high-voltage switchgear. This device, installed inside the high-voltage switchgear, includes a mounting box, a drive shaft, a first fixing part, a crank handle, and a connecting rod. One end of the drive shaft has an external thread and connects to the crank handle. The drive shaft passes through a mounting hole in the first fixing part, which has an internal thread that mates with the external thread. Cranking the crank handle causes the drive shaft to move back and forth relative to the first fixing part. The other end of the drive shaft is connected to the connecting rod via a transmission mechanism housed in the mounting box. This transmission mechanism converts the back-and-forth movement of the drive shaft into rotation of the connecting rod, which in turn drives the grounding switch to perform opening and closing operations. This high-voltage switchgear grounding switch operating device solves the technical problem of excessive operating resistance during the opening and closing process of the grounding switch, where the greatest force is concentrated on a single bevel gear, leading to wear or breakage of the bevel gear over long-term operation.
[0004] The aforementioned high-voltage switchgear grounding switch operating device operates by rotating the operating handle. However, due to the lack of restraint on the handle, it cannot automatically lock after the switch is in the open or close position, which can easily lead to misoperation or loosening, reducing the safety of the grounding switch in performing open and close operations. Utility Model Content
[0005] This utility model provides a grounding switch operating mechanism for high-voltage switchgear, aiming to solve the problem of the lack of limitations in the current rotary operating handle.
[0006] This utility model is implemented as follows: a grounding switch operating mechanism for a high-voltage switchgear includes a cabinet and a grounding switch working component located inside the cabinet. A fan-shaped groove is provided on the outer side of the cabinet, and a first limiting rod and a second limiting rod are fixed in the fan-shaped groove. A driving component is provided between the first limiting rod and the second limiting rod. A transmission component is provided inside the cabinet to switch the working state of the grounding switch working component under the drive of the driving component. An elastic component is also provided inside the cabinet to keep the driving component in contact with the first limiting rod or the second limiting rod.
[0007] Preferably, the driving component includes a handle, one end of which is vertically fixed with a rotating shaft that is rotatably connected to the cabinet, the end of the rotating shaft away from the handle passes through the cabinet and is fixed with a rocker arm, and a spur gear is fixed to the part of the rotating shaft located inside the cabinet.
[0008] Preferably, the rotating shaft is located at the center of the fan-shaped groove.
[0009] Preferably, the transmission component includes a linkage rod, one end of which is hinged to a transverse rod, and the side of the transverse rod is fixed with a slide bar that is slidably connected to the inner wall of the cabinet. The upper surface of the transverse rod is provided with a straight tooth surface that meshes with a spur gear.
[0010] The working component of the grounding switch includes an operating rod, a rod sleeve is fixedly sleeved on the outside of the operating rod, and a crank perpendicular to the axis of the operating rod is fixed on the outer side of the rod sleeve. The end of the linkage rod away from the transverse rod is hinged to the crank.
[0011] Preferably, the elastic component includes a tension spring, a first spring rod, and a second spring rod. The first spring rod is fixed to the inner wall of the cabinet, the second spring rod is fixed to the rocker arm, and the two ends of the tension spring are respectively fixed to the first spring rod and the second spring rod.
[0012] Preferably, the first spring rod is located directly above the rotating shaft, and the first limiting rod and the second limiting rod are centrally symmetrical about the positions of the first spring rod and the rotating shaft.
[0013] Compared with related technologies, the grounding switch operating mechanism for high-voltage switchgear provided by this utility model has the following beneficial effects:
[0014] 1. This utility model adopts a gear rack structure with spur gears meshing with spur tooth surfaces to convert rotational motion into linear motion. The first and second limit rods are used for auxiliary positioning to maintain transmission efficiency and force balance, avoiding the problem of local stress concentration in the gears. The transverse rod is slidably connected to the inner wall of the cabinet through a slide bar, providing stable guiding support, reducing offset or jamming during transmission, and improving reliability. The operation torque is dispersed by the cooperation of the gear rack and elastic components, reducing the resistance of the handle operation, extending the service life of the components, and ensuring automatic locking after the opening and closing of the switch, avoiding misoperation or loosening, and improving operational safety.
[0015] 2. The two ends of the tension spring of this utility model are respectively fixed on the first spring rod and the second spring rod. The elastic force makes the driving component (handle) always abut against the limit rod (first limit rod or second limit rod), realizing automatic positioning after opening and closing, reducing the intensity of manual operation. The first limit rod and the second limit rod are symmetrical about the center of the rotating shaft, ensuring that the driving component is subjected to balanced force when switching between opening and closing, and avoiding uneven load.
[0016] 3. This utility model has a fan-shaped groove on the outer side of the cabinet body, and integrates the drive components (handle, rotating shaft, rocker arm) into the groove, which saves space and is easy to operate. The linear motion of the horizontal moving rod is converted into the rotational action of the grounding switch operating rod through the crank. The structure is compact and reduces intermediate transmission links. Attached Figure Description
[0017] Figure 1 This is a schematic diagram showing the installation position of the grounding switch operating mechanism of a high-voltage switchgear according to this utility model;
[0018] Figure 2 This is a schematic diagram of the installation position of the grounding switch operating mechanism of a high-voltage switchgear according to another perspective.
[0019] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;
[0020] Figure 4 This is a schematic diagram of the grounding switch operating mechanism of this utility model in the open circuit state;
[0021] Figure 5 This is a schematic diagram of the grounding switch operating mechanism of this utility model in the circuit state.
[0022] In the diagram: 1. Cabinet; 11. Fan-shaped groove; 12. First limit rod; 13. Second limit rod; 2. Grounding switch working part; 21. Operating rod; 22. Rod sleeve; 23. Crank; 3. Transmission part; 31. Linkage rod; 32. Horizontal movement rod; 33. Slide bar; 34. Straight tooth surface; 4. Drive part; 41. Handle; 42. Rotating shaft; 43. Rocker arm; 44. Spur gear; 5. Elastic part; 51. Tension spring; 52. First spring rod; 53. Second spring rod. Detailed Implementation
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.
[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0025] Example
[0026] Please see Figure 1 and Figure 2 This utility model proposes a grounding switch operating mechanism for a high-voltage switchgear, including a cabinet 1 and a grounding switch working component 2 located inside the cabinet 1, such as... Figure 3 As shown, a fan-shaped groove 11 is provided on the outer side of the cabinet 1. A first limiting rod 12 and a second limiting rod 13 are fixed in the fan-shaped groove 11. A driving component 4 is provided between the first limiting rod 12 and the second limiting rod 13. A transmission component 3 is provided inside the cabinet 1 to switch the working state of the grounding switch working component 2 under the drive of the driving component 4. An elastic component 5 is also provided inside the cabinet 1 to keep the driving component 4 in contact with the first limiting rod 12 or the second limiting rod 13. By opening a fan-shaped groove 11 on the outer side of the cabinet 1, the driving component 4 (handle 41, rotating shaft 42, rocker arm 43) is integrated into the groove, saving space and facilitating operation.
[0027] Please see Figure 4 and Figure 5 The drive component 4 includes a handle 41. One end of the handle 41 is vertically fixed with a rotating shaft 42 that is rotatably connected to the cabinet 1. The end of the rotating shaft 42 away from the handle 41 passes through the cabinet 1 and is fixed with a rocker arm 43. A spur gear 44 is fixed to the part of the rotating shaft 42 located inside the cabinet 1. The rotating shaft 42 is located at the center of the fan-shaped groove 11.
[0028] Furthermore, the transmission component 3 includes a linkage rod 31, one end of which is hinged to a transverse rod 32. A slide bar 33 is fixed to the side of the transverse rod 32 and slidably connected to the inner wall of the cabinet 1. The transverse rod 32 is slidably connected to the inner wall of the cabinet 1 through the slide bar 33, providing stable guiding support, reducing offset or jamming during transmission, and improving reliability. The upper surface of the transverse rod 32 is provided with a straight tooth surface 34 that meshes with the spur gear 44. The transmission structure of the spur gear 44 meshing with the straight tooth surface 34 converts the rotational motion into linear motion. Then, the first limiting rod 12 and the second limiting rod 13 are used for auxiliary positioning, maintaining force balance while maintaining transmission efficiency, and avoiding the problem of local stress concentration of the gear.
[0029] Furthermore, the working component 2 of the grounding switch includes an operating lever 21, a lever sleeve 22 is fixedly sleeved on the outside of the operating lever 21, and a crank 23 perpendicular to the axis of the operating lever 21 is fixed on the outer side of the lever sleeve 22. The end of the linkage rod 31 away from the transverse rod 32 is hinged to the crank 23.
[0030] Furthermore, the elastic component 5 includes a tension spring 51, a first spring rod 52, and a second spring rod 53. The first spring rod 52 is fixed to the inner wall of the cabinet 1, and the second spring rod 53 is fixed to the rocker arm 43. The two ends of the tension spring 51 are respectively fixed to the first spring rod 52 and the second spring rod 53. The elastic force of the tension spring 51 ensures that the handle 41 always contacts the limit rod (first limit rod 12 or second limit rod 13), thereby achieving automatic positioning after opening and closing the circuit breaker and reducing the intensity of manual operation. The first spring rod 52 is located directly above the rotating shaft 42. The first limit rod 12 and the second limit rod 13 are centrally symmetrical about the positions of the first spring rod 52 and the rotating shaft 42, ensuring that the drive component 4 is subjected to balanced force during opening and closing switching and avoiding uneven load.
[0031] The working principle of this utility model is as follows: Figure 4 As shown, the grounding circuit of the working component 2 of the grounding switch is in an open circuit state. At this time, the rocker arm 43 is biased to the rear, and the drive component 4 is subjected to the elastic force of the tension spring 51, causing the handle 41 to abut against the first limit rod 12. When it is necessary to connect the grounding circuit, the handle 41 in the fan-shaped groove 11 can be pushed, which in turn drives the spur gear 44 to rotate counterclockwise through the rotating shaft 42. Under the meshing of the spur gear 44 and the spur tooth surface 34, the transverse rod 32 slides forward through the sliding limit of the slide bar 33. Then, the crank 23 is pulled by the hinge action of the linkage rod 31, and the operating rod 21 is rotated by the rod sleeve 22 to switch the grounding circuit to the open state. At this time, the rotating shaft 42 drives the rocker arm 43 to rotate to the front, so that the handle 41 is kept against the second limit rod 13 under the elastic force of the tension spring 51.
[0032] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.
[0033] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.
[0034] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.
Claims
1. A grounding switch operating mechanism for a high-voltage switchgear, comprising a cabinet (1) and a grounding switch working component (2) located within the cabinet (1), characterized in that, The outer side of the cabinet (1) is provided with a fan-shaped groove (11). A first limiting rod (12) and a second limiting rod (13) are fixed in the fan-shaped groove (11). A driving component (4) is provided between the first limiting rod (12) and the second limiting rod (13). A transmission component (3) is provided in the cabinet (1) to switch the working state of the grounding switch working component (2) under the drive of the driving component (4). An elastic component (5) is also provided in the cabinet (1) to keep the driving component (4) from contacting the first limiting rod (12) or the second limiting rod (13).
2. The high-voltage switchgear grounding switch operating mechanism as described in claim 1, characterized in that, The drive component (4) includes a handle (41), one end of which is vertically fixed with a rotating shaft (42) that is rotatably connected to the cabinet (1). The end of the rotating shaft (42) away from the handle (41) passes through the cabinet (1) and is fixed with a rocker arm (43). A spur gear (44) is fixed to the part of the rotating shaft (42) located inside the cabinet (1).
3. The high-voltage switchgear grounding switch operating mechanism as described in claim 2, characterized in that, The rotating shaft (42) is located at the center of the fan-shaped groove (11).
4. The grounding switch operating mechanism for a high-voltage switchgear as described in claim 2, characterized in that, The transmission component (3) includes a linkage rod (31), one end of which is hinged to a transverse rod (32). The side of the transverse rod (32) is fixed with a slide bar (33) that is slidably connected to the inner wall of the cabinet (1). The upper surface of the transverse rod (32) is provided with a straight tooth surface (34) that meshes with a spur gear (44).
5. The high-voltage switchgear grounding switch operating mechanism as described in claim 4, characterized in that, The grounding switch working component (2) includes an operating rod (21), a rod sleeve (22) is fixedly sleeved on the outside of the operating rod (21), and a crank (23) perpendicular to the axis of the operating rod (21) is fixed on the outer side of the rod sleeve (22). The end of the linkage rod (31) away from the transverse rod (32) is hinged to the crank (23).
6. The high-voltage switchgear grounding switch operating mechanism as described in claim 3, characterized in that, The elastic component (5) includes a tension spring (51), a first spring rod (52) and a second spring rod (53). The first spring rod (52) is fixed to the inner wall of the cabinet (1), and the second spring rod (53) is fixed to the rocker arm (43). The two ends of the tension spring (51) are respectively fixed to the first spring rod (52) and the second spring rod (53).
7. The grounding switch operating mechanism for a high-voltage switchgear as described in claim 6, characterized in that, The first spring rod (52) is located directly above the rotating shaft (42), and the first limiting rod (12) and the second limiting rod (13) are centrally symmetrical about the positions of the first spring rod (52) and the rotating shaft (42).