Vacuum circuit breaker with signal feedback mechanism

Abstract

The utility model relates to the field of electric power system and high voltage switch equipment discloses vacuum circuit breaker with signal feedback mechanism, including arc extinguishing chamber, the bottom fixedly connected with mechanism box of arc extinguishing chamber, the outside of mechanism box is provided with quick -witted connection mechanism, the top fixedly connected with voltage transformer of quick -witted connection mechanism, the outside fixedly connected with base of mechanism box, the outside of base is provided with quick -witted break mechanism, quick -witted connection mechanism includes support connecting plate, the outside fixedly connected with air cylinder no.

Description

Technical Field

[0001] This utility model relates to the field of power systems and high-voltage switchgear, and in particular to a vacuum circuit breaker with a signal feedback mechanism. Background Technology

[0002] Against the backdrop of a global energy structure transition towards cleaner and smarter energy, power systems are placing higher demands on the reliability, efficiency, and intelligence of transmission and distribution equipment. As a core switching device in the power system used to break and connect circuits and protect electrical equipment, vacuum circuit breakers are widely used in substations, industrial power distribution, and rail transportation due to their strong arc-extinguishing capability, excellent insulation performance, and long lifespan. With the accelerated development of smart grids, vacuum circuit breakers not only need to possess efficient circuit breaking and connecting functions but also need to meet intelligent requirements such as condition monitoring and remote control. Their technological upgrades and optimizations have become a crucial link in ensuring the safe and stable operation of the power system.

[0003] The core operation of existing vacuum circuit breakers revolves around "vacuum arc extinguishing" and "insulation characteristics." Its core component is the vacuum interrupter chamber, which maintains a high vacuum state and encapsulates the stationary and moving contacts. In the closed state, the stationary and moving contacts are in close contact, and the circuit is conductive. During opening, the operating mechanism drives the moving contact to quickly separate. The arc generated between the contacts is rapidly extinguished in the vacuum environment due to the lack of a free-state medium to sustain the arc. Simultaneously, the vacuum environment provides excellent insulation, ensuring reliable circuit disconnection. Auxiliary structures, such as the operating mechanism, are responsible for driving the contact movement to achieve the opening or closing operation.

[0004] In existing technologies, the connection between some devices, such as voltage transformers and other auxiliary components, and the circuit breaker body is mostly achieved by bolt fastening. This process is cumbersome, time-consuming, and seriously affects the overall operation and maintenance efficiency. In order to address the above-mentioned problems, a vacuum circuit breaker with a signal feedback mechanism is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a vacuum circuit breaker with a signal feedback mechanism, which aims to improve the problem of low assembly efficiency in some devices in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A vacuum circuit breaker with a signal feedback mechanism includes an arc-extinguishing chamber. A mechanism box is fixedly connected to the bottom of the arc-extinguishing chamber. A quick-connect mechanism is provided on the outside of the mechanism box. A voltage transformer is fixedly connected to the top of the quick-connect mechanism. A base is fixedly connected to the outside of the mechanism box. A quick-break mechanism is provided on the outside of the base. A detection display is fixedly connected to the outside of the arc-extinguishing chamber. A buffer mechanism is provided at the bottom of the base. The quick-connect mechanism includes a support connecting plate. The support connecting plate is fixedly connected to the outside of the mechanism box. A cylinder is fixedly connected to the outside of the support connecting plate. A push plate is fixedly connected to the drive end of the cylinder. A fixing component is provided on the outside of the push plate.

[0008] As a further description of the above technical solution:

[0009] The fast circuit breaking mechanism includes a current transformer, which is externally fixedly connected to the outside of the arc-extinguishing chamber, and a transmission link is externally fixedly connected to the current transformer.

[0010] As a further description of the above technical solution:

[0011] The support connecting plate is fixedly connected to the outside of a quick-connecting plate, the push plate is slidably connected to the outside of the quick-connecting plate, and the quick-connecting plate is slidably connected to the outside of a connecting frame.

[0012] As a further description of the above technical solution:

[0013] The fixing component includes a fixing block, the outside of which is slidably connected to the outside of the push plate, the outside of which is slidably connected to the inside of the quick-connect plate, the outside of which is slidably connected to the inside of the connecting frame, and the outside of which is slidably connected to the inside of the support connecting plate;

[0014] As a further description of the above technical solution:

[0015] The fixed block is internally fixedly connected to a limiting shaft, and the limiting shaft is externally rotatably connected to a fixed plate. The fixed plate is externally rotatably connected to the inside of the push plate, and the fixed plate is externally slidably connected to the outside of the connecting frame. The outside of the connecting frame is externally fixedly connected to the outside of the voltage transformer.

[0016] As a further description of the above technical solution:

[0017] The transmission link is rotatably connected to a rotating insulator inside, and a transmission plate is fixedly connected to the outside of the rotating insulator. A transmission shaft is fixedly connected to the outside of the transmission plate. The transmission shaft is rotatably connected to the inside of the base, and a rotating plate is fixedly connected to the outside of the transmission shaft.

[0018] As a further description of the above technical solution:

[0019] A support plate is fixedly connected to the outside of the base, a fixed insulator is fixedly connected to the outside of the support plate, and a transmission block is fixedly connected to the outside of the fixed insulator.

[0020] As a further description of the above technical solution:

[0021] The buffer mechanism includes a limiting post, which is externally fixedly connected to the bottom of the base. A buffer spring is sleeved on the outside of the limiting post, and multiple hollow support posts are fixedly connected to the bottom of the mechanism box.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the automated linkage structure driven by a cylinder replaces the cumbersome traditional manual bolt tightening operations, realizing the rapid installation and disassembly of the voltage transformer. This significantly shortens the operation time during equipment assembly or maintenance, and improves operation and maintenance efficiency. At the same time, the mechanical engagement of the fixing plate and the connecting frame, combined with the double limiting of the push plate inserting into the supporting connecting plate, forms a rigid fixing structure, ensuring the stability of the mechanical connection between the voltage transformer and the circuit breaker, ensuring the reliability of electrical contact, and effectively avoiding loosening or poor contact problems caused by vibration, temperature difference, and other factors during long-term operation.

[0024] 2. In this invention, a manually controlled multi-stage transmission structure ensures reliable linkage between the auxiliary circuit and the main circuit. During forward rotation, the transmission link contacts the transmission block, synchronously connecting the auxiliary circuit and providing necessary support for the stable operation of the main circuit. During reverse rotation, the connection is quickly disconnected, achieving flexible control. This integration of monitoring and control improves the transparency of equipment status and enhances operational safety and reliability. It is particularly suitable for special scenarios requiring manual intervention, providing dual protection for the stable operation of the power system. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the vacuum circuit breaker with a signal feedback mechanism proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the fixed insulator of the vacuum circuit breaker with a signal feedback mechanism proposed in this utility model;

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4This is a schematic diagram of the support connecting plate of the vacuum circuit breaker with a signal feedback mechanism proposed in this utility model;

[0029] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0030] Legend:

[0031] 1. Arc-extinguishing chamber; 2. Mechanism box; 3. Quick-connect mechanism; 31. Support connecting plate; 32. Quick-connect plate; 33. Connecting frame; 34. Cylinder 1; 35. Push plate; 36. Fixing assembly; 361. Fixing block; 362. Limiting shaft; 363. Fixing plate; 4. Voltage transformer; 5. Base; 6. Quick-break mechanism; 61. Current transformer; 62. Drive shaft; 63. Rotating plate; 64. Support plate; 65. Drive plate; 66. Fixed insulator; 67. Transmission block; 68. Drive connecting rod; 69. Rotating insulator; 7. Buffer mechanism; 71. Limiting post; 72. Buffer spring; 73. Hollow support post; 8. Detection display. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1 to 3This utility model provides an embodiment of a vacuum circuit breaker with a signal feedback mechanism, including an arc-extinguishing chamber 1. The arc-extinguishing chamber 1 is a high-vacuum environment, used to realize the switching of the circuit and quickly extinguish the arc generated when the contacts open and close. It is the core arc-extinguishing component of the circuit breaker. A mechanism box 2 is fixedly connected to the bottom of the arc-extinguishing chamber 1. The mechanism box 2 houses the operating mechanism, control circuit, and signal processing unit, used to drive the opening and closing of the contacts of the arc-extinguishing chamber 1 and process the signals of the status sensor. It is the operation control center of the circuit breaker. A quick-connect mechanism 3 is provided on the outside of the mechanism box 2. The quick-connect mechanism 3 is used to realize the quick mechanical fixing and electrical connection of the voltage transformer 4 to the circuit breaker body, simplifying the installation and maintenance process. The voltage transformer 4 is fixedly connected to the top of the quick-connect mechanism 3. The voltage transformer 4 is used to convert high voltage into high voltage. The voltage is proportionally converted to a low voltage to realize the measurement and feedback of the line voltage, providing voltage signals for protection and monitoring. The mechanism box 2 is externally fixedly connected to a base 5, which supports the arc-extinguishing chamber 1 and the mechanism box 2, provides stable support, and serves as part of the conductive circuit. The base 5 is externally equipped with a fast circuit breaking mechanism 6, which controls the opening and closing of the auxiliary circuit through mechanical linkage, realizing coordinated action with the main circuit and enhancing operational reliability. The arc-extinguishing chamber 1 is externally fixedly connected to a detection display 8, which is used to display parameters such as contact position, vacuum degree, current, and voltage in real time, realizing visual monitoring of equipment status. The bottom of the base 5 is equipped with a buffer mechanism 7, which is used to absorb the impact force generated by circuit breaker operation or external vibration, reducing damage to the equipment structure.

[0034] The quick-connect mechanism 3 includes a support connecting plate 31, which supports components such as cylinder 34 and quick-connect plate 32, providing an installation foundation and structural support for the quick-connect mechanism 3. The support connecting plate 31 is externally fixedly connected to the outside of the mechanism box 2. Cylinder 34 is externally fixedly connected to the support connecting plate 31, driving the push plate 35 to move. The drive end of cylinder 34 is fixedly connected to the push plate 35. A fixing component 36 is provided on the outside of the push plate 35, which is used to connect the voltage transformer. Device 4 is tightly connected to the circuit breaker body to ensure the mechanical strength and electrical contact stability of the connection. The fast circuit breaking mechanism 6 includes a current transformer 61, which is sleeved on the main circuit to sense the line current and convert it into a weak signal to provide current parameters for overcurrent protection and status monitoring. The current transformer 61 is externally fixedly connected to the outside of the arc-extinguishing chamber 1. A transmission link 68 is externally fixedly connected to the current transformer 61. The transmission link 68 is used to transmit the movement of the rotating insulator 69 to realize the on / off control of the auxiliary circuit.

[0035] A quick-connecting plate 32 is fixedly connected to the outside of the supporting connecting plate 31. The quick-connecting plate 32 provides sliding guidance for the push plate 35 and the connecting frame 33. The push plate 35 is slidably connected to the outside of the quick-connecting plate 32. The quick-connecting plate 32 is slidably connected to the outside of the connecting frame 33. The connecting frame 33 is fixed on the voltage transformer 4, serving as both an adapter for mechanical connection and an electrical connection through contact with the quick-connecting plate 32.

[0036] The fixing component 36 includes a fixing block 361, which moves synchronously with the push plate 35 to drive the limit shaft 362 and the fixing plate 363. It serves as the transmission intermediary for the fixing component 36. The fixing block 361 is externally slidably connected to the outside of the push plate 35, the outside of the push plate 35 is externally slidably connected to the inside of the quick-connect plate 32, the outside of the fixing block 361 is externally slidably connected to the inside of the connecting frame 33, the outside of the push plate 35 is externally slidably connected to the inside of the supporting connecting plate 31, and the inside of the fixing block 361 is fixedly connected to... A limiting shaft 362 is provided to limit the rotation trajectory of the fixing plate 363, ensuring that the fixing plate 363 rotates at a preset angle and precisely engages with the connecting frame 33. The fixing plate 363 is rotatably connected to the outside of the limiting shaft 362. The fixing plate 363 engages with the connecting frame 33 by rotation, forming a mechanical lock. The outside of the fixing plate 363 is rotatably connected to the inside of the push plate 35, and the outside of the fixing plate 363 is slidably connected to the outside of the connecting frame 33. The outside of the connecting frame 33 is fixedly connected to the outside of the voltage transformer 4.

[0037] Reference Figure 2 , Figure 3 and Figure 5The fast-break mechanism 6 includes a current transformer 61, which monitors the main circuit current in real time and provides a trigger signal for fast-break. The current transformer 61 is externally fixedly connected to the outside of the arc-extinguishing chamber 1. A transmission link 68 is externally fixedly connected to the current transformer 61. The transmission link 68 converts the rotational motion of the rotating insulator 69 into its own linear motion, achieving contact or separation with the transmission block 67. The rotating insulator 69 is rotatably connected internally to the transmission link 68. A transmission plate 65 is externally fixedly connected to the rotating insulator 69. The transmission plate 65 is used to change the rotational direction of the transmission shaft 62, transmitting the rotation to the rotating insulator 69. A transmission plate 65 is externally fixedly connected to... A drive shaft 62 is externally rotatably connected to the inside of the base 5. A rotating plate 63 is fixedly connected to the outside of the drive shaft 62. The rotating plate 63 facilitates the operation of the entire quick circuit breaker mechanism 6 by maintenance personnel through mechanical operation. A support plate 64 is fixedly connected to the outside of the base 5. The support plate 64 is used to support the fixed insulator 66 and provide a stable installation foundation for the transmission block 67. The fixed insulator 66 is fixedly connected to the outside of the support plate 64. The fixed insulator 66 realizes the insulation isolation between the transmission block 67 and the support plate 64 to avoid grounding short circuit. The transmission block 67 is fixedly connected to the outside of the fixed insulator 66. When the transmission block 67 contacts the transmission connecting rod 68, the auxiliary circuit is connected; when separated, it is disconnected.

[0038] The buffer mechanism 7 includes a limiting post 71, which provides guidance for the buffer spring 72, restricts its extension and contraction direction, and prevents the spring from deviating and failing. The limiting post 71 is externally fixedly connected to the bottom of the base 5. The buffer spring 72 is sleeved on the outside of the limiting post 71. The buffer spring 72 absorbs the impact force generated by the circuit breaker opening and closing operation or external vibration through its own elastic deformation, reducing the structural stress of the equipment. Multiple hollow support columns 73 are fixedly connected to the bottom of the mechanism box 2. The hollow support columns 73 assist in supporting the mechanism box 2, and at the same time, the hollow structure reduces the weight and enhances the shock absorption effect in conjunction with the buffer spring 72.

[0039] Working principle: After receiving the control signal, the mechanism box 2 drives the push plate 35 to slide along the quick connection plate 32 through the cylinder 34. When the push plate 35 slides, it drives the fixing block 361 outside it to move synchronously. The limiting shaft 362 inside the fixing block 361 forces the fixing plate 363 to rotate. The fixing plate 363 rotates until it engages with the connecting frame 33. At the same time, the push plate 35 is inserted into the support connecting plate 31 to achieve the limit, thus completing the quick installation of the voltage transformer 4.

[0040] The status sensor outside the arc-extinguishing chamber 1 monitors the contact position and vacuum level of the arc-extinguishing chamber 1. The signal is synchronously transmitted to the detection display 8. Manual control is used to rotate the rotating plate 63, which drives the transmission shaft 62 to rotate. The transmission shaft 62 drives the transmission plate 65, which drives the insulator 69 to rotate. This causes the transmission link 68 to move downward, so that the transmission link 68 contacts the transmission block 67 outside the fixed insulator 66 supported by the support plate 64 supported by the base 5. This connects the auxiliary circuit and ensures the main circuit is connected. Reverse rotation disconnects the circuit.

[0041] The overcurrent signal of the current transformer 61 and the tripping signal of the arc-extinguishing chamber 1 are synchronously transmitted to the detection display 8. The hollow support column 73, together with the limit column 71 and the buffer spring 72, forms a multi-point support to disperse vibration energy and avoid severe vibration from affecting the detection accuracy of the voltage transformer 4 and the current transformer 61 and the stability of each connecting component.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vacuum circuit breaker with a signal feedback mechanism, comprising an arc-extinguishing chamber (1), characterized in that: The bottom of the arc-extinguishing chamber (1) is fixedly connected to a mechanism box (2), a quick-connect mechanism (3) is provided on the outside of the mechanism box (2), a voltage transformer (4) is fixedly connected to the top of the quick-connect mechanism (3), a base (5) is fixedly connected to the outside of the mechanism box (2), a quick-break mechanism (6) is provided on the outside of the base (5), a detection display (8) is fixedly connected to the outside of the arc-extinguishing chamber (1), and a buffer mechanism (7) is provided at the bottom of the base (5). The quick connection mechanism (3) includes a support connection plate (31), which is fixedly connected to the outside of the mechanism box (2). A cylinder (34) is fixedly connected to the outside of the support connection plate (31), and a push plate (35) is fixedly connected to the drive end of the cylinder (34). A fixing component (36) is provided on the outside of the push plate (35).

2. The vacuum circuit breaker with a signal feedback mechanism according to claim 1, characterized in that: The fast circuit breaking mechanism (6) includes a current transformer (61), which is fixedly connected to the outside of the arc-extinguishing chamber (1), and a transmission link (68) is fixedly connected to the outside of the current transformer (61).

3. The vacuum circuit breaker with a signal feedback mechanism according to claim 1, characterized in that: The support connecting plate (31) is fixedly connected to the outside of a quick connecting plate (32), the push plate (35) is slidably connected to the outside of the quick connecting plate (32), and the quick connecting plate (32) is slidably connected to the outside of a connecting frame (33).

4. The vacuum circuit breaker with a signal feedback mechanism according to claim 3, characterized in that: The fixing component (36) includes a fixing block (361), the outside of which is slidably connected to the outside of the push plate (35), the outside of which is slidably connected to the inside of the quick-connect plate (32), the outside of which is slidably connected to the inside of the connecting frame (33), and the outside of which is slidably connected to the inside of the support connecting plate (31).

5. The vacuum circuit breaker with a signal feedback mechanism according to claim 4, characterized in that: The fixed block (361) is internally fixedly connected to a limiting shaft (362), and the limiting shaft (362) is externally rotatably connected to a fixing plate (363). The external part of the fixing plate (363) is rotatably connected to the inside of the push plate (35), and the external part of the fixing plate (363) is slidably connected to the outside of the connecting frame (33). The external part of the connecting frame (33) is fixedly connected to the outside of the voltage transformer (4).

6. The vacuum circuit breaker with a signal feedback mechanism according to claim 2, characterized in that: The transmission link (68) is rotatably connected to a rotating insulator (69) inside. The rotating insulator (69) is fixedly connected to a transmission plate (65) outside. The transmission plate (65) is fixedly connected to a transmission shaft (62) outside. The transmission shaft (62) is rotatably connected to the inside of the base (5) outside. The transmission shaft (62) is fixedly connected to a rotating plate (63) outside.

7. The vacuum circuit breaker with a signal feedback mechanism according to claim 6, characterized in that: The base (5) is fixedly connected to a support plate (64), the support plate (64) is fixedly connected to a fixed insulator (66), and the fixed insulator (66) is fixedly connected to a transmission block (67).

8. The vacuum circuit breaker with a signal feedback mechanism according to claim 1, characterized in that: The buffer mechanism (7) includes a limiting post (71), the limiting post (71) is fixedly connected to the bottom of the base (5), a buffer spring (72) is sleeved on the outside of the limiting post (71), and a plurality of hollow support posts (73) are fixedly connected to the bottom of the mechanism box (2).

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