Upper isolation environment-friendly semi-solid-sealed switch

Abstract

The utility model relates to an upper isolation environment-friendly semi-solid-sealed switch, which adopts the design of a semi-solid-sealed polar pole and a vacuum arc-extinguishing chamber, effectively improves the insulating property and the arc-extinguishing capability of the switch, reduces the damage of electric arc to switch equipment, and improves the safety and the reliability of the switch. The sealing performance of the vacuum arc-extinguishing chamber is further enhanced through the arrangement of the fixed sealing plug, external impurities and moisture are prevented from invading, the service life of the switch is prolonged, accurate control over the vacuum arc-extinguishing chamber is achieved through the linkage matching design of the main shaft and the cam transmission assembly, the switching-on and switching-off speed and accuracy of the switch are improved, and the service life of the switch is prolonged. The arrangement of the interphase check rings effectively prevents mutual interference between the cam transmission assemblies, the stability of the switch in the operation process is ensured, the design of the upper isolation enables the electrical isolation distance between the moving contact and the static contact to be large when the switch is in an opening state, and a larger safety space is provided for maintenance and repair personnel.

Description

TECHNICAL FIELD

[0001] The utility model relates to a switch cabinet technical field especially relates to a kind of upper isolation environmental protection semi-enclosed switch. BACKGROUND

[0002] In power system, switchgear as key component, its performance directly affects the safe, reliable and efficient operation of system. Traditional switchgear has certain limitation in insulation performance, arc extinguishing ability and structural stability. For example, some switchgears adopt open design, easily influenced by external environment, leading to insulation performance decline, and arc extinguishing effect is poor, arc is greater to the damage of equipment, shortens the service life of equipment, simultaneously, the movable contact and static contact component design of traditional switchgear is often relatively simple, difficult to adapt to complex circuit layout and installation space, and transmission efficiency is lower in opening and closing process, response speed is slow, arc and spark generated by poor contact easily, affect the electrical safety performance of equipment.

[0003] In addition, the mechanism frame structure of traditional switchgear is often relatively loose, and the stability and strength are insufficient, leading to the device to be prone to sway or deformation during operation, which affects the good contact between the movable contact and the static contact, and the design of grounding system is also often imperfect, lacks effective grounding path, and cannot quickly lead the leakage or static electricity into the ground, which poses potential hazards to personnel and equipment. SUMMARY

[0004] Therefore, the utility model aims at providing a kind of upper isolation environmental protection semi-enclosed switch with high performance, high reliability and high safety.

[0005] To achieve the above object, the utility model adopts such a kind of upper isolation environmental protection semi-enclosed switch, including mechanism frame, circuit breaker component being arranged on mechanism frame, a plurality of movable contact components being arranged on mechanism frame, a plurality of static contact components being arranged on mechanism frame, the circuit breaker component includes a plurality of semi-enclosed poles being installed on mechanism frame, each semi-enclosed pole is equipped with vacuum interrupter, one end of semi-enclosed pole is equipped with main shaft in common, main shaft is respectively installed with cam transmission assembly corresponding to semi-enclosed pole, and cam transmission assembly is equipped with interval baffle between them, cam transmission assembly is used to drive vacuum interrupter in corresponding semi-enclosed pole with main shaft linkage cooperation, vacuum interrupter is equipped with solid seal plug being installed on vacuum interrupter at the end away from cam transmission assembly.

[0006] The beneficial effects of the above structure are as follows: By adopting the design of semi-solid-sealed poles and vacuum interrupters, the insulation performance and arc-extinguishing capability of the switch are effectively improved, reducing the damage of electric arc to the switchgear, thereby improving the safety and reliability of the switch. The setting of solid-sealed plugs further enhances the sealing performance of the vacuum interrupter, preventing the intrusion of external impurities and moisture, and extending the service life of the switch. The linkage design of the main shaft and cam drive assembly realizes precise control of the vacuum interrupter, improving the opening and closing speed and accuracy of the switch. The setting of phase-to-phase retaining rings effectively prevents mutual interference between cam drive assemblies, ensuring the stability of the switch during operation. The upper isolation design makes the electrical isolation distance between the moving contact and the stationary contact larger when the switch is open, providing a larger safety space for maintenance and repair personnel.

[0007] This utility model is further configured such that the moving contact assembly corresponds to the semi-solid-sealed pole. Each moving contact assembly includes an isolation crank arm, a moving contact, and a moving contact connector. Moving contacts are provided on both sides of the inner wall of the isolation crank arm. The moving contacts are connected to each other via the moving contact connector and maintained in contact with the vacuum interrupter sealing plug in the corresponding semi-solid-sealed pole by spring pressure. Adjacent isolation crank arms are nested together to form a series array. This nested connection between adjacent isolation crank arms allows the moving contact assembly to flexibly adapt to different circuit layouts and installation spaces. Because the moving contact assembly corresponds to the semi-solid-sealed pole and is linked to the main shaft via a cam transmission assembly, the transmission efficiency of the switch during opening and closing is higher, and the response speed is faster. Maintaining contact between the moving contact and the vacuum interrupter by spring pressure effectively prevents arcing and sparking caused by poor contact.

[0008] This utility model is further configured such that the stationary contact assembly corresponds to the moving contact assembly. Each stationary contact assembly includes a stationary contact seat mounted on a frame and a stationary contact mounted within the stationary contact seat. The stationary contact seat has an isolation groove, and an isolation support member is provided within the isolation groove. At one end of the stationary contact near the isolation support member, a stationary contact insulation plate is mounted on the isolation support member. The isolation support member is connected to the stationary contact through the stationary contact insulation plate, which ensures electrical isolation between the two. The installation of the stationary contact insulation plate ensures electrical isolation between the isolation support member and the stationary contact, effectively preventing current from flowing through unexpected paths and improving the electrical safety performance of the equipment. The design of the isolation groove and the isolation support member provides stable support for the stationary contact, preventing displacement or deformation of the stationary contact under stress or vibration, and maintaining good contact between the stationary contact and the moving contact.

[0009] This utility model is further configured with a frame including a front wall panel and a rear wall panel, a first fixed bracket, a second fixed bracket, and a third fixed bracket installed between the front and rear wall panels, and a fixed iron bar, on which a stationary contact assembly is mounted. By setting up the front wall panel, the rear wall panel, and multiple fixed brackets, the overall structure of the frame is strengthened, improving the stability and strength of the equipment. Mounting the stationary contact assembly on the fixed iron bar makes the installation and disassembly of the stationary contact assembly more convenient and quick.

[0010] This utility model is further configured with a grounding bracket installed between the front and rear wall panels. The grounding bracket contains a grounding copper busbar, on which grounding contacts corresponding to the stationary contact assembly are mounted. Each grounding contact is equipped with a grounding fixing element installed on the top wall of the grounding bracket. The grounding copper busbar and grounding contacts provide a reliable grounding path for the electrical system. During equipment operation, any potential leakage current or static electricity can be quickly conducted to the ground through the grounding copper busbar, thus avoiding potential hazards to personnel and equipment.

[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 mechanism frame according to an embodiment of this utility model.

[0014] Figure 3 This is an exploded view of the static contact assembly structure according to an embodiment of the present invention.

[0015] Figure 4 This is a schematic diagram of the internal structure of the grounding bracket according to an embodiment of the present utility model. Detailed Implementation

[0016] like Figures 1-4As shown, an embodiment of this utility model provides an environmentally friendly semi-solidified switch with upper isolation, including a frame 1, a circuit breaker assembly 2 mounted on the frame 1, three moving contact assemblies 3 mounted on the frame 1, and three stationary 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.

[0017] Three moving contact assemblies 3 correspond to three semi-solid-sealed pole posts 21. Each moving contact assembly 3 includes an isolation crank arm 31, a moving contact 32, and a moving contact connector 33. Moving contacts 32 are provided on both sides of the inner wall of the isolation crank arm 31. The moving contacts 32 are connected to each other through the moving contact connector 33 and are kept in contact with the vacuum interrupter 22 solid-sealed plug 26 in the corresponding semi-solid-sealed pole post 21 by spring pressure. Adjacent isolation crank arms 31 are nested and connected to form a series array.

[0018] Three stationary contact assemblies 4 correspond to three moving contact assemblies 3. Each stationary contact assembly 4 includes a stationary contact seat 41 mounted on the frame 1 and a stationary contact 42 mounted in the stationary contact seat 41. The stationary contact seat 41 is provided with an isolation groove, and an isolation support member 43 made of ribbed steel is provided in the isolation groove. The stationary contact 42 is provided with a stationary contact insulation plate 44 mounted on the isolation support member 43 at one end near the isolation support member 43. The isolation support member 43 is connected to the stationary contact 42 through the stationary contact insulation plate 44, which is used to ensure electrical isolation between the two.

[0019] The frame 1 consists of a front wall panel 11, a rear wall panel 12, and a first fixed bracket 13, a second fixed bracket 14, a third fixed bracket 15, and a fixed iron bar 16 installed between the front and rear wall panels. The three stationary contact assemblies 4 are all installed on the fixed iron bar 16. In addition, a grounding bracket 17 is installed between the front wall panel 11 and the rear wall panel 12. The grounding bracket 17 has a grounding copper busbar 171 inside. The grounding copper busbar 171 is equipped with grounding contacts 172 corresponding to the three stationary contact assemblies 4. The grounding contacts 172 are also equipped with grounding fixing parts 173 made of ribbed steel. The grounding fixing parts 173 are installed on the inner top wall of the grounding bracket 17 to provide a reliable grounding path for the electrical system.

[0020] 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 31 in the series array, and the positioning shaft assembly 121 is connected to one end of the last isolation crank arm 31 in the series array. This provides precise positioning and fixation for the entire series array of moving contact assembly 3, and improves the motion stability of moving contact assembly 3.

[0021] 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 top-isolated, environmentally friendly, semi-solid-sealed switch, characterized in that: The device includes a frame, a circuit breaker assembly mounted on the frame, several moving contact assemblies mounted on the frame, and several stationary 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 end away from the cam drive assembly.

2. The top-isolated environmentally friendly semi-solid-sealed switch according to claim 1, characterized in that: The moving contact assembly corresponds to the semi-solid-sealed pole. Each moving contact assembly includes an isolation crank arm, a moving contact, and a moving contact connector. Moving contacts are provided on both sides of the inner wall of the isolation crank arm. The moving contacts are connected to each other through the moving contact connector and are kept in contact with the vacuum interrupter solid-sealed plug in the corresponding semi-solid-sealed pole by spring pressure. The adjacent isolation crank arms are nested and connected to form a series array.

3. The top-isolated environmentally friendly semi-solidified switch according to claim 1 or 2, characterized in that: The stationary contact assembly corresponds to the moving contact assembly. Each stationary contact assembly includes a stationary contact seat mounted on a frame and a stationary contact mounted in the stationary contact seat. The stationary contact seat has an isolation groove, and an isolation support is provided in the isolation groove. The stationary contact has a stationary contact insulation plate mounted on the isolation support at one end near the isolation support. The isolation support is connected to the stationary contact through the stationary contact insulation plate, which is used to ensure electrical isolation between the two.

4. The top-isolated 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 first fixed bracket and a second fixed bracket installed between the front wall panel and the rear wall panel, a third fixed bracket and a fixed iron bar, and a stationary contact assembly is installed on the fixed iron bar.

5. The top-isolated environmentally friendly semi-solid-sealed switch according to claim 4, characterized in that: A grounding bracket is also installed between the front wall panel and the rear wall panel. A grounding copper busbar is provided inside the grounding bracket. A grounding contact corresponding to the stationary contact assembly is installed on the grounding copper busbar. A grounding fixing component is installed on the grounding contact and mounted on the top wall inside the grounding bracket.

6. The top-isolated 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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