Lower isolation environment-friendly semi-solid-sealed switch

Abstract

The utility model relates to a lower isolation environment-friendly semi-solid-sealed switch, which realizes high integration of switch equipment by integrating a circuit breaker assembly, a static contact assembly, a moving contact assembly and the like on a mechanism frame, and is characterized in that a vacuum arc-extinguishing chamber is arranged in each semi-solid-sealed polar pole, so that the generation and diffusion of electric arcs can be effectively inhibited in a vacuum environment, and the reliability of the switch equipment is improved. The breaking capacity and the arc extinguishing speed of the switch are improved, the cam transmission assemblies are driven through the rotating motion of the main shaft, then the opening and closing operation of the vacuum arc extinguishing chamber is achieved, mutual interference between the cam transmission assemblies is effectively prevented through the arrangement of the interphase check rings, and the sealing performance of the vacuum arc extinguishing chamber is enhanced through the fixed sealing plug. According to the utility model, external impurities and moisture are prevented from invading, so that the service life of the switch is prolonged, the conductive clamp ensures good connection between the vacuum arc-extinguishing chamber and an external circuit, and the conductive performance and the electrical stability of the switch are improved.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, and in particular to a bottom-isolated environmentally friendly semi-solidified switch. Background Technology

[0002] In power systems, switchgear is an indispensable and important component, and its performance directly affects the safe, stable and efficient operation of the power system. Traditional switchgear often suffers from problems such as complex structure, low integration, poor arc extinguishing performance and insufficient safety.

[0003] Specifically, the components of traditional switchgear are usually scattered, resulting in a large footprint and inconvenient installation and maintenance. At the same time, the arc extinguishing system of traditional switchgear often adopts a relatively simple structure, resulting in poor arc extinguishing effect. Especially when interrupting large currents, it is easy to generate electric arcs, which can damage equipment and personnel. In addition, traditional switchgear also has deficiencies in sealing and conductivity, allowing external impurities and moisture to easily penetrate into the equipment, affecting its normal operation and service life. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a highly integrated, arc-extinguishing, and highly safe bottom-isolated environmentally friendly semi-solid-sealed switch.

[0005] To achieve the above objectives, this utility model employs a bottom-isolated environmentally friendly semi-solidified switch, comprising a frame, a circuit breaker assembly mounted on the frame, several stationary contact assemblies mounted on the circuit breaker assembly, and several moving contact assemblies mounted on the frame. The circuit breaker assembly includes several semi-solidified poles mounted on the frame, each semi-solidified pole containing a vacuum interrupter. One end of each semi-solidified pole shares a common main shaft. A cam drive assembly corresponding to each semi-solidified pole is mounted on the main shaft, with interleaved retaining rings between the cam drive assemblies. The cam drive assembly is used to drive the vacuum interrupter within the corresponding semi-solidified pole in conjunction with the main shaft. A solidified plug is mounted on the vacuum interrupter at the end of the vacuum interrupter away from the cam drive assembly. A conductive clamp is mounted on the vacuum interrupter between the vacuum interrupter and the cam drive assembly.

[0006] The beneficial effects of the above structure are as follows: by integrating circuit breaker components, stationary contact components, and moving contact components onto the frame, a high degree of integration of the switchgear is achieved. Each semi-solid-sealed pole is equipped with a vacuum interrupter, and the vacuum environment can effectively suppress the generation and spread of electric arcs, improving the breaking capacity and arc extinguishing speed of the switch. The rotational motion of the main shaft drives the cam transmission component, thereby realizing the opening and closing operation of the vacuum interrupter. The setting of the phase-to-phase retaining rings effectively prevents mutual interference between the cam transmission components. The solid-sealed plug enhances the sealing of the vacuum interrupter, preventing the intrusion of external impurities and moisture, thereby extending the service life of the switch. The conductive clamp ensures a good connection between the vacuum interrupter and the external circuit, improving the conductivity and electrical stability of the switch.

[0007] This utility model is further configured such that a stationary contact assembly corresponds to a semi-solid-sealed pole. Each stationary contact assembly includes a stationary contact, one end of which is fitted with a stationary contact baffle. An isolation support member is also provided between the stationary contact and the stationary contact baffle, engaging with the stationary contact. The stationary contact contacts the vacuum interrupter sealing plug within the corresponding semi-solid-sealed pole, and the stationary contact and the sealing plug are connected by screws. By incorporating the stationary contact baffle and isolation support member within the stationary contact assembly, these components, working together with the stationary contact, form an additional protective barrier for the vacuum interrupter. This not only helps maintain the vacuum environment inside the vacuum interrupter but also prevents the intrusion of external impurities and moisture, further improving the sealing performance of the switch.

[0008] This utility model is further configured such that the moving contact assembly corresponds to the stationary contact assembly. Each moving contact assembly includes an insulator mounted on a frame and an isolation crank arm disposed at one end of the insulator. The isolation crank arm is connected to the insulator by a connector. One end of the connector is connected to the insulator by a screw, and the other end of the connector extends into the isolation crank arm. Moving contacts are provided on both sides of the connector extending into the isolation crank arm. The isolation crank arm is provided with a slot corresponding to the moving contact. The moving contact extends outward through the slot. Adjacent isolation crank arms are nested together to form a series array. A lower isolation disc is sleeved between adjacent isolation crank arms. The lower isolation disc is installed at the connection of the nested outer isolation crank arm. The moving contact assembly is securely mounted on the frame by connecting the isolating crank arm to the insulator using connectors and screws. One end of the connector is tightly fixed to the insulator with screws, while the other end extends into the inside of the isolating crank arm, forming a stable support structure. Adjacent isolating crank arms are connected in a nested manner to form a series array. This connection method not only enhances the overall structural strength of the moving contact assembly but also helps to reduce the footprint of the assembly, achieving efficient space utilization. A lower isolating disc is fitted between adjacent isolating crank arms. The lower isolating disc not only serves as an isolation and insulation mechanism but also provides additional support for the moving contact assembly.

[0009] This utility model is further configured with a frame including a front wall panel and a rear wall panel, and fixed iron bars and grounding brackets installed between the front wall panel and the rear wall panel. The fixed iron bars and grounding brackets are correspondingly arranged, and a moving contact assembly is installed on the fixed iron bars. The frame, composed of the front wall panel, the rear wall panel, and the fixed iron bars and grounding brackets installed therebetween, provides robust support for key components such as the moving contact assembly and the circuit breaker assembly.

[0010] This utility model is further configured such that a grounding copper busbar is provided inside the grounding bracket, and a grounding contact corresponding to the moving contact assembly is installed on the grounding copper busbar. The grounding contact abuts against a grounding fixing member installed on the bottom wall of the grounding bracket. By setting a grounding copper busbar inside the grounding bracket, a dedicated grounding channel is provided for the moving contact assembly. The grounding contact is installed on the grounding copper busbar and abuts against the grounding fixing member installed on the bottom wall of the grounding bracket, ensuring a tight contact between the grounding contact and the grounding fixing member, further improving the reliability of grounding.

[0011] This utility model is further configured such that an isolation shaft assembly is mounted on the front wall panel, and a positioning shaft assembly is mounted on the rear wall panel. The isolation shaft assembly is connected to one end of the first isolation crank arm in the series array, and the positioning shaft assembly is connected to one end of the last isolation crank arm in the series array. By connecting the first and last isolation crank arms of the series array with the isolation shaft assembly and the positioning shaft assembly respectively, precise positioning and fixation are provided for the entire series array of moving contact assemblies. This helps prevent the moving contact assembly from shifting or wobbling during movement, thus improving the movement stability of the moving contact assembly. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0013] Figure 2 This is an exploded view of the internal structure of the frame according to an embodiment of the present invention.

[0014] Figure 3 This is a schematic diagram of the assembly of the stationary contact assembly and the solid seal plug according to an embodiment of the present utility model.

[0015] Figure 4 This is an exploded view of the moving contact assembly structure according to an embodiment of the present invention.

[0016] Figure 5 This is a schematic diagram of the internal structure of the grounding bracket according to an embodiment of the present utility model. Detailed Implementation

[0017] like Figures 1-5As shown, an embodiment of this utility model provides a bottom-isolated environmentally friendly semi-solidified switch, including a frame 1, a circuit breaker assembly 2 mounted on the frame 1, three stationary contact assemblies 3 mounted on the circuit breaker assembly 2, and three moving contact assemblies 4 mounted on the frame 1. The circuit breaker assembly 2 includes three semi-solidified pole posts 21 integrally mounted on the frame 1. Each semi-solidified pole post 21 is provided with a vacuum interrupter 22. One end of each semi-solidified pole post 21 is provided with a main shaft 23. Cam transmission assemblies 24 corresponding to the semi-solidified pole post 21 are respectively mounted on the main shaft 23, and phase retaining rings 25 are provided between the cam transmission assemblies 24. The cam transmission assemblies 24 are used to drive the vacuum interrupter 22 in the corresponding semi-solidified pole post 21 in linkage with the main shaft 23. The vacuum interrupter 22 is provided with a solidified plug 26 mounted on the vacuum interrupter 22 at the end away from the cam transmission assembly 24. A conductive clamp 27 mounted on the vacuum interrupter 22 is provided between the vacuum interrupter 22 and the cam transmission assembly 24.

[0018] Three stationary contact assemblies 3 correspond to three semi-solid-sealed pole posts 21. Each stationary contact assembly 3 includes a stationary contact 31. A stationary contact baffle 32 is installed at one end of the stationary contact 31. An isolation support 33 is also provided between the stationary contact 31 and the stationary contact baffle 32 and is snapped onto the stationary contact 31. The stationary contact 31 is in contact with the solid-sealed plug 26 of the vacuum interrupter 22 in the corresponding semi-solid-sealed pole post 21. The stationary contact 31 and the solid-sealed plug 26 are connected by screws.

[0019] Three moving contact assemblies 4 correspond to three stationary contact assemblies 3. Each moving contact assembly 4 includes an insulator 41 mounted on the frame 1 and an isolation crank arm 42 located at one end of the insulator 41. The isolation crank arm 42 is connected to the insulator 41 by a connector 43. One end of the connector 43 is connected to the insulator 41 by a screw, and the other end of the connector 43 extends into the isolation crank arm 42. Moving contacts 44 are provided on both sides of the connector 43 extending into the isolation crank arm 42. The isolation crank arm 42 is provided with a slot corresponding to the moving contact 44. The moving contact 44 extends outward through the slot. Adjacent isolation crank arms 42 are nested and connected to form a series array. A lower isolation disc 45 is sleeved between adjacent isolation crank arms 42. The lower isolation disc 45 is installed at the connection of the nested isolation crank arms 42.

[0020] The frame 1 includes a front wall panel 11 and a rear wall panel 12, a fixed iron bar 13 installed between the front wall panel 11 and the rear wall panel 12, and a grounding bracket 14. The fixed iron bar 13 and the grounding bracket 14 are correspondingly arranged. A moving contact assembly 4 is installed on the fixed iron bar 13. A grounding copper busbar 141 is provided inside the grounding bracket 14. A grounding contact 142 corresponding to the moving contact assembly 4 is installed on the grounding copper busbar 141. The grounding contact 142 abuts against a grounding fixing member 143 installed on the bottom wall of the grounding bracket 13.

[0021] An isolation shaft assembly 111 is installed on the front wall panel 11, and a positioning shaft assembly 121 is installed on the rear wall panel 12. The isolation shaft assembly 111 is connected to one end of the first isolation crank arm 42 in the series array. At the beginning of the series array, a lower isolation disk 45 is also provided at the connection between the isolation shaft assembly 111 and the first isolation crank arm 42 to ensure effective isolation between the isolation shaft assembly 111 and the first isolation crank arm 42. The positioning shaft assembly 121 is connected to one end of the last isolation crank arm 42 in the series array.

[0022] Of course, in addition to the above embodiments, this utility model may have other various embodiments. Without departing from the essential technical solution of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, and these changes or modifications are equivalent to the technical solution in this patent. Therefore, these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model, and the utility model creation is in line with the applicant's actual R&D capabilities and resource conditions.

Claims

1. A bottom-isolated, environmentally friendly, semi-solidified switch, characterized in that: The device includes a frame, a circuit breaker assembly mounted on the frame, several stationary contact assemblies mounted on the circuit breaker assembly, and several moving contact assemblies mounted on the frame. The circuit breaker assembly includes several semi-solid-sealed poles mounted on the frame. Each semi-solid-sealed pole has a vacuum interrupter. One end of each semi-solid-sealed pole has a common main shaft. The main shaft is equipped with cam drive assemblies corresponding to the semi-solid-sealed poles, and the cam drive assemblies are provided with inter-phase retaining rings. The cam drive assemblies are used to drive the vacuum interrupter in the corresponding semi-solid-sealed pole in linkage with the main shaft. The vacuum interrupter has a solid seal plug mounted on the vacuum interrupter at the end away from the cam drive assembly. The vacuum interrupter has a conductive clamp mounted on the vacuum interrupter between the vacuum interrupter and the cam drive assembly.

2. The lower-isolation environmentally friendly semi-solid-sealed switch according to claim 1, characterized in that: The stationary contact assembly corresponds to the semi-solid-sealed pole post. Each stationary contact assembly includes a stationary contact. One end of the stationary contact is equipped with a stationary contact baffle. An isolation support member is also provided between the stationary contact and the stationary contact baffle, which is snapped onto the stationary contact. The stationary contact contacts the vacuum interrupter sealing plug in the corresponding semi-solid-sealed pole post. The stationary contact and the sealing plug are connected by screws.

3. The lower-isolated environmentally friendly semi-solidified switch according to claim 1 or 2, characterized in that: The moving contact assembly corresponds to the stationary contact assembly. Each moving contact assembly includes an insulator mounted on the frame and an isolation crank arm disposed at one end of the insulator. The isolation crank arm is connected to the insulator by a connector. One end of the connector is connected to the insulator by a screw, and the other end of the connector extends into the isolation crank arm. Moving contacts are provided on both sides of the connector extending into the isolation crank arm. The isolation crank arm has a slot corresponding to the moving contact. The moving contact extends outward through the slot. Adjacent isolation crank arms are nested together to form a series array. A lower isolation disk is sleeved between adjacent isolation crank arms. The lower isolation disk is installed at the connection of the nested isolation crank arm.

4. The lower-isolation environmentally friendly semi-solid-sealed switch according to claim 3, characterized in that: The frame includes a front wall panel and a rear wall panel, a fixed iron bar installed between the front wall panel and the rear wall panel, and a grounding bracket. The fixed iron bar and the grounding bracket are correspondingly arranged, and a moving contact assembly is installed on the fixed iron bar.

5. The lower-isolation environmentally friendly semi-solid-sealed switch according to claim 4, characterized in that: The grounding bracket is equipped with a grounding copper busbar, and a grounding contact corresponding to the moving contact assembly is installed on the grounding copper busbar. The grounding contact abuts against a grounding fixing member installed on the bottom wall of the grounding bracket.

6. The lower-isolation environmentally friendly semi-solid-sealed switch according to claim 4, characterized in that: An isolation shaft assembly is installed on the front wall panel, and a positioning shaft assembly is installed on the rear wall panel. The isolation shaft assembly is connected to one end of the first isolation crank arm in the series array, and the positioning shaft assembly is connected to one end of the last isolation crank arm in the series array.

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