Operating structure of vacuum circuit breaker

Abstract

The utility model relates to the field of vacuum circuit breakers, in particular to an operation structure of a vacuum circuit breaker, which is characterized in that a vacuum circuit breaker operation rotating shaft and a linkage crankshaft are arranged on a main frame body of the operation structure, and the crankshaft is connected with an opening and closing linkage mechanism. And the operating force is stably transmitted to the vacuum circuit breaker to realize opening and closing. The anti-misoperation mechanism is a core highlight, an anti-misoperation single-side arc-shaped groove on the tripping insulation frame is matched with an arc-shaped groove sliding cylinder, and the cylinder can slide normally only during compliance operation, otherwise, abnormal action can be prevented. A tripping rod contact on the opening and closing tripping rod can trigger a protection mechanism when misoperation occurs. In addition, the reset spring plays a role in buffering and resetting, the cable placement rack and the electric wire U-shaped buckle enable the cables to be managed orderly, and the isolation plate protects the vacuum insulation shaft. The overall structure is reasonable, misoperation can be effectively avoided, and stable operation of a power system is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of vacuum circuit breakers, and more specifically, to an operating structure of a vacuum circuit breaker. Background Art

[0002] In the power system, the circuit breaker operating mechanism is a key component to ensure the normal operation of power equipment and the safety of personnel. However, there are many problems in the existing circuit breaker operating mechanisms in practical applications. First of all, the existing circuit breaker operating mechanisms usually lack an effective anti-misoperation mechanism. In the existing operating mechanisms, the opening and closing operations often rely only on the subjective judgment of the operator and conventional operation instructions, lacking precise constraints on the operation sequence and force. When the operator has excessive operation force or incorrect operation sequence due to negligence or fatigue, the operating mechanism cannot effectively prevent the abnormal movement of the opening and closing linkage rod, which is extremely likely to cause the circuit breaker to malfunction. Such malfunctions may trigger power outages, resulting in the interruption of power supply, affecting industrial production and residents' lives; they may also damage power equipment, increasing maintenance costs; and even pose a serious threat to the personal safety of on-site operators.

[0003] There are deficiencies in the transmission structure of the existing opening and closing linkage mechanism. The transmission structures of some operating mechanisms are complex, and the connections between components are not tight and reasonable enough, resulting in easy energy loss and error during the transmission of the operating force, making it difficult to accurately and stably transmit to the vacuum circuit breaker, so that the opening and closing actions of the circuit breaker are not accurate enough, affecting the normal operation of the power system. Some existing operating mechanisms lack effective reset devices or the reset function is imperfect. During the operation, it cannot buffer the impact force well, easily damages the components of the operating mechanism, and shortens the service life of the components. Moreover, after the operation, the opening and closing linkage rod cannot accurately return to the initial position, affecting the coherence and stability of the next operation.

[0004] The existing operating mechanisms have deficiencies in electrical insulation performance. It is easy to occur leakage and electric shock accidents, posing a threat to the safe operation of the power system. The existing operating mechanisms lack reasonable cable placement and fixing devices, and the cables are often placed randomly, prone to chaos. Such a chaotic cable layout may lead to short circuits and open circuits, and is not conducive to the maintenance and repair of the cables.

[0005] In the existing operating mechanisms, some components lack effective protection measures, are easily affected by external factors, have unnecessary contact or interference with other surrounding components, reducing the overall stability and reliability of the operating mechanism and shortening the service life of the equipment. Therefore, we make improvements on this and propose an operating structure of a vacuum circuit breaker. Summary of the Utility Model

[0006] The object of the present utility model is to address the problems raised in the current background technology. To achieve the above object of the utility model, the present utility model provides the following technical solutions: An operating structure of a vacuum circuit breaker, including a main frame body of the operating mechanism, on which a vacuum circuit breaker operating rotating shaft is provided. It is characterized in that a linkage crankshaft is provided on the vacuum circuit breaker operating rotating shaft, the linkage crankshaft is connected to the opening and closing linkage mechanism, and the opening and closing linkage mechanism is connected to the anti-misoperation mechanism.

[0007] As a preferred technical solution of the present utility model, the opening and closing linkage mechanism is provided with an opening and closing pressure rod, the opening and closing pressure rod is connected to an L-shaped connecting rod, the L-shaped connecting rod is connected to a vacuum insulating shaft, and an insulating shaft fixing buckle plate is arranged on the outer surface of the vacuum insulating shaft.

[0008] As a preferred technical solution of the present utility model, the bottom of the vacuum insulating shaft is connected to an opening and closing linkage rod.

[0009] As a preferred technical solution of the present utility model, the anti-misoperation mechanism is provided with a tripping insulating frame, a single-sided arc-shaped groove for anti-misoperation is opened on the tripping insulating frame, and an arc-shaped groove sliding cylinder is arranged in the single-sided arc-shaped groove for anti-misoperation.

[0010] As a preferred technical solution of the present utility model, the arc-shaped groove sliding cylinder is connected to the bottom end of the opening and closing linkage rod.

[0011] As a preferred technical solution of the present utility model, an insulating frame shaft is arranged at the center line of the tripping insulating frame.

[0012] As a preferred technical solution of the present utility model, a spring top plate is arranged at the lower part of the opening and closing linkage rod, and a return spring is arranged below the spring top plate.

[0013] As a preferred technical solution of the present utility model, the arc-shaped groove sliding cylinder is linked and connected to an opening and closing tripping rod, and a tripping rod contact point is arranged on the opening and closing tripping rod.

[0014] As a preferred technical solution of the present utility model, a cable placement rack is arranged above the main frame body of the operating mechanism, and a wire U-shaped buckle is arranged on the cable placement rack.

[0015] As a preferred technical solution of the present utility model, isolation plates are arranged on both sides of the vacuum insulating shaft.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: The anti-misoperation single-sided arc groove on the tripping insulating frame of the present utility model cooperates with the arc groove sliding cylinder. Only when the specific operation sequence and force are met, can the arc groove sliding cylinder slide smoothly in the groove, and then the normal opening and closing operations can be realized. If the operation does not conform to the regulations, such as excessive operation force or incorrect operation sequence, the sliding of the arc groove sliding cylinder is blocked, preventing the abnormal movement of the opening and closing linkage rod, avoiding the incorrect action of the circuit breaker caused by misoperation, and greatly improving the safety of the power system operation.

[0017] The tripping rod contact on the opening and closing tripping rod of the present utility model plays an important role in operation monitoring and control. During normal operation, it works in cooperation with the corresponding circuit or control device; once misoperation occurs, the abnormal movement of the arc groove sliding cylinder drives the abnormal movement of the opening and closing tripping rod, and the tripping rod contact will send a signal in time to trigger the protection mechanism, such as cutting off the operation power supply, further enhancing the operation safety and providing double protection for power equipment and personnel.

[0018] The opening and closing linkage mechanism of the present utility model adopts a transmission structure composed of an opening and closing pressure rod, an L-shaped connecting rod, and a vacuum insulating shaft component. This structure enables the operating force to be accurately and stably transmitted to the vacuum circuit breaker, ensuring the accurate opening and closing actions of the circuit breaker. The connections between the components are tight and reasonable, reducing the energy loss and error during the transmission process and improving the reliability of the operation.

[0019] The reset spring at the lower part of the opening and closing linkage rod of the present utility model plays a key role during the operation. It can not only buffer the impact force during the operation, reduce the damage to each component of the operating mechanism, and extend the service life of the components; but also enable the opening and closing linkage rod to accurately return to the initial position after the operation, preparing for the next operation and ensuring the coherence and stability of the operation.

[0020] The structures of the various components of the operating mechanism of the present utility model are reasonable and the layout is clear, facilitating the maintenance personnel to conduct inspections and replacements. For example, the insulating shaft fixing buckle plate facilitates the disassembly and installation of the vacuum insulating shaft. If the vacuum insulating shaft fails or requires regular maintenance, it can be easily removed from the main frame body of the operating mechanism for processing.

[0021] Due to the adoption of the anti-misoperation mechanism and the stable transmission structure, the present utility model reduces the probability of the operating mechanism malfunctioning, thereby reducing the workload and frequency of daily maintenance. At the same time, the improved reliability of the components also means that the replacement cycle of the components is extended, reducing the maintenance cost.

[0022] The cable placement rack and wire U-shaped buckle provided above the main frame body of the operating mechanism of the present utility model facilitate the placement and fixation of cables. The cables can be neatly arranged, avoiding potential short circuit and open circuit problems caused by cable chaos, and also facilitating the maintenance and repair of cables.

[0023] The isolation plates on both sides of the vacuum insulation shaft of the present utility model can prevent the influence of external factors on the vacuum insulation shaft, and at the same time avoid unnecessary contact or interference with other surrounding components, ensuring the overall stability and reliability of the operating mechanism and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram provided by the present utility model;

[0025] Figure 2 is an internal structural diagram provided by the present utility model;

[0026] Figure 3 is an internal structural diagram provided by the present utility model;

[0027] Figure 4 is a partial structural diagram provided by the present utility model;

[0028] Figure 5 is a partial structural diagram provided by the present utility model.

[0029] Labels in the figures:

[0030] 1. Main frame body of the operating mechanism; 2. Operating rotating shaft of the vacuum circuit breaker; 3. Linkage crankshaft; 4. Opening and closing pressure rod; 5. L-shaped connecting rod; 6. Vacuum insulation shaft; 7. Insulation shaft fixing buckle; 8. Opening and closing linkage rod; 9. Tripping insulation frame; 10. Anti-misoperation single-sided arc groove; 11. Arc groove sliding cylinder; 12. Insulation frame shaft; 13. Spring top plate; 14. Return spring; 15. Opening and closing tripping rod; 16. Tripping rod contact; 17. Cable placement rack; 18. Wire U-shaped buckle; 19. Isolation plate. SPECIFIC EMBODIMENTS

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present utility model.

[0032] Therefore, the following detailed description of the embodiments of the present utility model is not intended to limit the scope of the claimed present utility model, but merely represents some embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts fall within the scope of protection of the present utility model. It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments may be combined with each other. It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] Embodiment 1: An operating structure of a vacuum circuit breaker, including an operating mechanism main frame 1. A vacuum circuit breaker operating rotating shaft 2 is arranged on the operating mechanism main frame 1. A linkage crankshaft 3 is arranged on the vacuum circuit breaker operating rotating shaft 2. The linkage crankshaft 3 is connected to the opening and closing linkage mechanism, and the opening and closing linkage mechanism is connected to the anti-misoperation mechanism. The opening and closing linkage mechanism is provided with an opening and closing pressure rod 4. The opening and closing pressure rod 4 is connected to an L-shaped connecting rod 5. The L-shaped connecting rod 5 is connected to a vacuum insulating shaft 6. An insulating shaft fixing buckle 7 is arranged on the outer surface of the vacuum insulating shaft 6. The bottom of the vacuum insulating shaft 6 is connected to an opening and closing linkage rod 8.

[0034] The anti-misoperation mechanism is provided with a tripping insulating frame 9. An anti-misoperation single-sided arc groove 10 is formed on the tripping insulating frame 9. An arc groove sliding cylinder 11 is arranged in the anti-misoperation single-sided arc groove 10. The arc groove sliding cylinder 11 is connected to the bottom end of the opening and closing linkage rod 8. An insulating frame shaft 12 is arranged at the center line of the tripping insulating frame 9. A spring top plate 13 is arranged at the lower part of the opening and closing linkage rod 8. A return spring 14 is arranged below the spring top plate 13. The arc groove sliding cylinder 11 is linked to a tripping rod 15. A tripping rod contact 16 is arranged on the tripping rod 15. A cable placement rack 17 is arranged above the operating mechanism main frame 1. A wire U-shaped buckle 18 is arranged on the cable placement rack 17. Isolation plates 19 are arranged on both sides of the vacuum insulating shaft 6.

[0035] Working principle of the anti-misoperation pole-mounted vacuum circuit breaker operating mechanism: The core function of the operating mechanism is to realize the opening and closing operations of the pole-mounted vacuum circuit breaker and at the same time have the ability to prevent misoperations. It mainly transmits the operating force to the vacuum circuit breaker through the linkage between the components on the operating mechanism main frame 1 and uses the anti-misoperation mechanism to avoid unnecessary or incorrect operations.

[0036] Opening and closing operation principle: When it is necessary to perform opening and closing operations on the pole-mounted vacuum circuit breaker, the operator rotates the vacuum circuit breaker operating rotating shaft 2. As the starting power source of the entire operation, the rotation of this rotating shaft drives the connected linkage crankshaft 3 to move.

[0037] Closing and opening linkage mechanism transmission: The movement of the linkage crankshaft 3 is transmitted to the closing and opening linkage mechanism. The closing and opening pressure lever 4 in the closing and opening linkage mechanism moves along with the action of the linkage crankshaft 3. The closing and opening pressure lever 4 is connected to the L-shaped connecting rod 5, which converts the movement direction of the closing and opening pressure lever 4.

[0038] The movement of the L-shaped connecting rod 5 drives the vacuum insulating shaft 6 connected to it. The insulating shaft fixed buckle plate 7 on the outer surface of the vacuum insulating shaft 6 plays a role in fixing and positioning the vacuum insulating shaft 6, ensuring the stability and accuracy of its movement.

[0039] The bottom of the vacuum insulating shaft 6 is connected to the closing and opening linkage rod 8, and the movement of the vacuum insulating shaft 6 further drives the closing and opening linkage rod 8 to move.

[0040] Vacuum circuit breaker operation: The movement of the closing and opening linkage rod 8 directly acts on the vacuum circuit breaker to realize the closing and opening operations of the circuit breaker. Specifically, when the closing and opening linkage rod 8 moves upward or downward, it will drive the contacts inside the vacuum circuit breaker to separate or close, thus completing the cutting off or connecting of the circuit.

[0041] On the trip insulating bracket 9 in the anti-misoperation mechanism, there is an anti-misoperation single-sided arc groove 10, and an arc groove sliding cylinder 11 is arranged in the arc groove. The arc groove sliding cylinder 11 is connected to the bottom end of the closing and opening linkage rod 8. When performing normal closing and opening operations, the movement of the closing and opening linkage rod 8 drives the arc groove sliding cylinder 11 to slide in the anti-misoperation single-sided arc groove 10.

[0042] Due to the special shape structure of the arc groove, only under the condition of conforming to a specific operation sequence and force, the arc groove sliding cylinder 11 can slide smoothly in the groove, so as to ensure that the closing and opening linkage rod 8 can drive the vacuum circuit breaker to perform closing and opening operations normally.

[0043] If the operation does not conform to the regulations, such as excessive operation force or wrong operation sequence, the arc groove sliding cylinder 11 may not be able to slide normally in the groove, thus preventing the abnormal movement of the closing and opening linkage rod 8 and avoiding the wrong action of the circuit breaker caused by misoperation.

[0044] Function of the insulating bracket shaft 12 and the return spring 14: An insulating bracket shaft 12 is arranged at the center line of the trip insulating bracket 9, which provides a rotation support point for the trip insulating bracket 9. A spring top plate 13 is arranged at the lower part of the closing and opening linkage rod 8, and a return spring 14 is arranged below the spring top plate 13.

[0045] During normal operation, the return spring 14 plays a role of buffering and resetting. When the closing and opening linkage rod 8 moves, the return spring 14 will be compressed or stretched, absorbing part of the energy, reducing the impact force during the operation, and protecting each component of the operating mechanism.

[0046] After the operation is completed, the reset spring 14 will return the opening and closing linkage rod 8 to its initial position, preparing for the next operation. At the same time, the presence of the reset spring 14 also increases the stability and reliability of the operation, further preventing misoperation.

[0047] Functions of the opening and closing release lever 15 and the release lever contact 16: The arc groove sliding cylinder 11 is linked to the opening and closing release lever 15, and the release lever contact 16 is provided on the opening and closing release lever 15. During normal operation, the movement of the arc groove sliding cylinder 11 drives the opening and closing release lever 15 to move through the linkage relationship, enabling the release lever contact 16 to cooperate with the corresponding circuit or control device to monitor and control the operation.

[0048] If a misoperation occurs, such as abnormal movement of the arc groove sliding cylinder 11, the movement of the opening and closing release lever 15 will also be abnormal, and the release lever contact 16 will send a signal to trigger the corresponding protection mechanism, such as cutting off the operating power supply, thus avoiding damage to the entire system caused by misoperation.

[0049] The cable placement rack 17 provided above the main frame body 1 of the operating mechanism is used to place the cables related to the operating mechanism, and the wire U-shaped buckle 18 is used to fix the cables, ensuring the neat arrangement and safe connection of the cables, and avoiding the cables from shaking or shifting during the operation, which may affect the normal operation of the operating mechanism.

[0050] The isolation plates 19 provided on both sides of the vacuum insulating shaft 6 play a role of isolation and protection. It can prevent the influence of external factors on the vacuum insulating shaft 6, and at the same time avoid unnecessary contact or interference between the vacuum insulating shaft 6 and other surrounding components, ensuring the stability and reliability of the operating mechanism. This anti-misoperation pole-mounted vacuum circuit breaker operating mechanism realizes the normal opening and closing operations of the pole-mounted vacuum circuit breaker through the coordinated work of each component, and effectively prevents the occurrence of misoperation;

[0051] Embodiment 2: An operating structure of a vacuum circuit breaker. The vacuum circuit breaker operating rotating shaft 2 is installed on the corresponding bearing seat of the operating mechanism main frame body 1 to ensure that the rotating shaft rotates flexibly without jamming. The linkage crankshaft 3 is key-connected to the vacuum circuit breaker operating rotating shaft 2 and fastened with a locking nut to ensure the reliable connection between the two and accurately transmit the torque. One end of the opening and closing pressure lever 4 is hinged to the linkage crankshaft 3 to ensure that it can swing flexibly as the linkage crankshaft 3 rotates. One end of the L-shaped connecting rod 5 is hinged to the other end of the opening and closing pressure lever 4, and the other end is connected to the top of the vacuum insulating shaft 6 through a coupling to ensure a tight connection and reliable transmission.

[0052] Use the insulating shaft fixing buckle 7 to fix the vacuum insulating shaft 6 at the corresponding position on the main frame body 1 of the operating mechanism, adjust the fastening degree of the buckle to ensure the stability of the vacuum insulating shaft 6. Connect the top of the opening and closing linkage rod 8 to the bottom of the vacuum insulating shaft 6, which can be connected by threading or welding to ensure a firm connection. Install the tripping insulating frame 9 on the main frame body 1 of the operating mechanism through the insulating frame shaft 12 to ensure that the tripping insulating frame 9 can rotate flexibly around the insulating frame shaft 12. Install the arc groove sliding cylinder 11 in the anti-misoperation single-sided arc groove 10 of the tripping insulating frame 9, apply an appropriate amount of grease to ensure smooth sliding in the groove.

[0053] Connect the arc groove sliding cylinder 11 to the bottom end of the opening and closing linkage rod 8, which can be connected by a pin to ensure a reliable linkage relationship between the two. Install a spring top plate 13 at the lower part of the opening and closing linkage rod 8, and install a return spring 14 below the spring top plate 13, and adjust the pre-tightening force of the spring to meet the structural requirements.

[0054] Link the opening and closing tripping rod 15 to the arc groove sliding cylinder 11, install the tripping rod contact 16, and adjust its position and contact pressure to ensure that it can accurately trigger a signal. Install the cable placement rack 17 above the main frame body 1 of the operating mechanism and fix it with bolts. Install wire U-shaped buckles 18 on the cable placement rack 17, and fix the relevant cables with U-shaped buckles after arranging them.

[0055] Install the isolation plate 19 on both sides of the vacuum insulating shaft 6 and fix it with screws to ensure that the isolation plate 19 is firmly installed and plays a good isolation role. Manually rotate the operating shaft 2 of the vacuum circuit breaker to check whether the movement of the opening and closing linkage mechanism and the anti-misoperation mechanism is smooth and whether there is interference between components.

[0056] Adjust the pre-tightening force of the return spring 14 so that the opening and closing linkage rod 8 can accurately return to the initial position after the operation. Check the sliding condition of the arc groove sliding cylinder 11 in the anti-misoperation single-sided arc groove 10 to ensure that it can slide according to the structural requirements. Use a multimeter to check the conduction of the tripping rod contact 16 to ensure that it can accurately send a signal during normal operation and misoperation. Use an insulation resistance tester to detect the insulation resistance of the vacuum insulating shaft 6 and other insulating components to ensure that their insulation performance meets the requirements.

[0057] Perform multiple simulated opening and closing operations, observe the operation of the vacuum circuit breaker, and check whether the anti-misoperation mechanism can effectively prevent misoperation. Under simulated misoperation conditions, such as excessive operating force or incorrect operating sequence, verify whether the anti-misoperation mechanism can trigger the protection mechanism in a timely manner to prevent the incorrect operation of the circuit breaker. Apply the pole-mounted vacuum circuit breaker operating mechanism with anti-misoperation assembled and debugged to the actual power system, and perform normal opening and closing operations according to the operating procedures. During the operation, the operator should closely observe the operation of the operating mechanism to ensure its normal operation.

[0058] The above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above respective embodiments, the present invention is not limited to the above specific embodiments. Therefore, any modification or substitution of the present invention; and all technical solutions and their improvements that do not depart from the spirit and scope of the present invention are covered by the scope of the claims of the present invention.

Claims

1. An operating structure of a vacuum circuit breaker, comprising an operating mechanism main frame (1), wherein the operating mechanism main frame (1) is provided with a vacuum circuit breaker operating shaft (2), characterized in that: The vacuum circuit breaker operating shaft (2) is provided with a linkage crankshaft (3), the linkage crankshaft (3) is connected to a gate opening and closing linkage mechanism, and the gate opening and closing linkage mechanism is connected to an anti-misoperation mechanism.

2. The operating structure of a vacuum circuit breaker according to claim 1, characterized in that: The gate opening and closing linkage mechanism is provided with a gate opening and closing pressure rod (4), the gate opening and closing pressure rod (4) is connected to an L-shaped connecting rod (5), the L-shaped connecting rod (5) is connected to a vacuum insulation shaft (6), and an insulating shaft fixing buckle plate (7) is provided on the outer surface of the vacuum insulation shaft (6).

3. The operating structure of a vacuum circuit breaker according to claim 2, characterized in that: The bottom of the vacuum insulation shaft (6) is connected to the opening and closing linkage rod (8).

4. The operating structure of a vacuum circuit breaker according to claim 3, characterized in that: The anti-misoperation mechanism is provided with a tripping insulating frame (9), the tripping insulating frame (9) is provided with an anti-misoperation single-sided arc groove (10), and an arc groove sliding cylinder (11) is provided in the anti-misoperation single-sided arc groove (10).

5. The operating structure of a vacuum circuit breaker according to claim 4, characterized in that: The arc-shaped groove sliding cylinder (11) is connected to the bottom end of the opening and closing linkage rod (8).

6. The operating structure of a vacuum circuit breaker according to claim 5, characterized in that: An insulating frame shaft (12) is arranged at the center line of the release insulating frame (9).

7. The operating structure of a vacuum circuit breaker according to claim 6, characterized in that: A spring top plate (13) is provided at the lower portion of the opening and closing linkage rod (8), and a return spring (14) is provided below the spring top plate (13).

8. The operating structure of a vacuum circuit breaker according to claim 7, characterized in that: The arc-shaped groove sliding cylinder (11) is linked to an opening and closing tripping rod (15), and a tripping rod contact (16) is provided on the opening and closing tripping rod (15).

9. The operating structure of a vacuum circuit breaker according to claim 8, characterized in that: A cable placement rack (17) is arranged above the operating mechanism main frame (1), and a wire U-shaped buckle (18) is arranged on the cable placement rack (17).

10. An operating structure of a vacuum circuit breaker according to claim 9, characterized in that: Isolation plates (19) are provided on both sides of the vacuum insulation shaft (6).

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