Air insulation permanent magnetic mechanism vacuum circuit breaker frame

Abstract

The utility model discloses a vacuum circuit breaker frame of an air insulation permanent magnetic mechanism. Comprising an installation longitudinal beam, the installation longitudinal beam is provided with static contact installation portions, insulator installation portions, a control connection mechanism installation portion, an isolation switch combination portion and a manual opening combination portion, and a static contact combination structure is assembled between the static contact installation portions of the installation longitudinal beam in an embedded and matched mode through clamping grooves. An insulator fixing structure is assembled between the insulator installation parts of the installation longitudinal beams through plug-in type limiting fit, a control fixing structure is assembled between the control connection mechanism installation parts of the installation longitudinal beams through plug-in type limiting fit, and a connection shaft protection partition plate is installed at the upper end of the manual opening combination part and located outside the manual opening control mechanism. The beneficial effects of the utility model are that: can accomplish the fixed combination of circuit breaker frame quickly and accurately, provide the accurate installation combination location basis for component, have enough support, installation combination is firmer and more reliable, guarantee circuit breaker molding quality and mechanical strength.

Description

Technical Field

[0001] The utility model relates to the technical field of switch equipment, and more specifically, in particular to an air-insulated permanent magnetic mechanism vacuum circuit breaker frame. Background Art

[0002] Circuit breakers are important electrical protection devices in electrical systems. They can automatically cut off circuits according to operating conditions. They are mainly used to protect circuits from overload, short circuit, undervoltage and other faults and to avoid accidental damage.

[0003] Each component in the circuit breaker needs to be supported and fixedly installed by the circuit breaker frame, providing a stable installation foundation for other key components. Since the circuit breaker frame needs to bear the weight of important components such as the arc extinguishing chamber, operating mechanism, and contact system, the decoupling strand of the circuit breaker frame is required to have sufficient mechanical strength.

[0004] The existing manufacturing process of circuit breaker frames is relatively complicated, requiring multiple processing and treatment steps, and the production cycle is long. For some frames with complex shapes, multiple cutting, stamping, welding, machining and other processes are required, which increases production time and cost.

[0005] During the production and processing, the plates need to be aligned and welded at the same time. However, due to the lack of a limiting structure, the plates are easily offset during docking, resulting in misalignment of the produced circuit breaker frame structure, affecting the mechanical strength and factory quality of the circuit breaker frame. In order to solve the problem of plate alignment, a large number of fixing fixtures are needed to position a single plate. The positioning operation is difficult and can only be fixed individually. After welding, the fixing fixtures need to be removed for re-alignment and fixation. The processing operation is time-consuming. After alignment, the traditional welding processing method will generate heat during processing, causing the plates to deform due to heat, affecting the dimensional accuracy of the frame and the accuracy of the form and position tolerances.

[0006] In addition, at present, the molding quality inspection of circuit breaker frames mainly relies on manual appearance inspection and simple measuring tools. The detection methods are limited and it is difficult to find potential quality problems caused by some micro-deformations.

[0007] In view of this, it is necessary to develop a circuit breaker frame structure with accurate and firm assembly alignment, reliable mechanical strength, and good processing quality to meet the needs of existing electrical systems for the use of circuit breaker frames. Utility Model Content

[0008] The utility model aims to provide an air-insulated permanent magnet mechanism vacuum circuit breaker frame, which solves the problems existing in the existing frames for supporting and fixing the components of circuit breaker by means of a new circuit breaker frame structure technical solution which is firm in combination, accurate in assembly alignment, convenient in production and processing, and good in molding effect.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0010] An air-insulated permanent magnet mechanism vacuum circuit breaker frame comprises an installation longitudinal beam, the installation longitudinal beam is provided with a static contact installation part, an insulator installation part, a control connection mechanism installation part, an isolating switch assembly part, and a manual opening switch assembly part, a static contact assembly structure is assembled between the static contact installation parts of the installation longitudinal beam through a card slot embedding fit, an insulator fixing structure is assembled between the insulator installation parts of the installation longitudinal beam through a card insertion type limit fit, a control fixing structure is assembled between the control connection mechanism installation parts of the installation longitudinal beam through a card insertion type limit fit, an isolating switch control mechanism is assembled in the isolating switch assembly part, a manual opening switch control mechanism is assembled in the manual opening switch assembly part, and a coupling shaft protection partition is assembled at the upper end of the manual opening switch assembly part and outside the manual opening switch control mechanism.

[0011] Preferably, the static contact assembly structure includes a static contact mounting beam and a static contact mounting base plate, both sides of the static contact mounting beam and the static contact mounting base plate are provided with embedded card blocks, the outer side of the static contact mounting portion is provided with an embedded card slot, the embedded card block and the embedded card slot are mutually embedded and limited, the insulator fixing structure includes a first insulator assembly beam and a second insulator assembly beam, both sides of the first insulator assembly beam and the second insulator assembly beam are provided with limiting plug blocks, a limiting plug hole and a limiting card slot are provided in the insulator mounting portion, the limiting plug block is respectively inserted and locked with the limiting plug hole and the limiting card slot, the first A support plate limiting groove is provided on the outer side of the insulator assembly beam, an insulator support plate is installed in the support plate limiting groove, the upper end of the insulator support plate is arranged against the lower end surface of the second insulator assembly beam, the control fixing structure includes symmetrically arranged fixed beams, connecting rod movable gaps are provided between the fixed beams, fixed blocks are provided on both sides of the fixed beams, a beam insertion hole is provided in the control connection mechanism mounting part, the fixed block is inserted and fixed in the beam insertion hole, a permanent magnetic opening and closing mechanism fixing plate and a vacuum chamber fixing plate are provided on the fixed beam, and a mounting rib is provided between the permanent magnetic opening and closing mechanism fixing plate and the mounting longitudinal beam.

[0012] Preferably, a combination groove is formed at the combination end of the stationary contact mounting crossbeam, and a combination card block is provided at the butt end of the stationary contact mounting base plate, and the combination card block is inserted into the combination groove.

[0013] Preferably, a disconnector shaft support hole is formed on one side of the disconnector combination part, a disconnector operation combination hole is formed on the other side of the disconnector combination part, a disconnector shaft support seat is installed in the disconnector shaft support hole, a manual tripping shaft combination hole is formed on one side of the manual tripping combination part, a manual tripping shaft support bearing is arranged in the manual tripping shaft combination hole, a manual tripping shaft protection baffle is installed outside the manual tripping shaft combination hole, a manual tripping installation hole is formed on the other side of the manual tripping combination part, and a manual tripping transmission seat sleeve is fixedly arranged in the manual tripping installation hole.

[0014] Preferably, an enclosing cover plate is installed at the upper end of the installation longitudinal beam, and the enclosing cover plate is fixedly wrapped around the upper end of the installation longitudinal beam through the coupling protection partition plate.

[0015] Preferably, the enclosing cover plate, the outer end of the permanent magnet closing and tripping mechanism fixing plate and the outer wall of the installation longitudinal beam form a sealed enclosing and isolating structure.

[0016] Preferably, a cover plate positioning combination hole is formed on the upper end surface of the coupling protection partition plate, a cover plate locking hole is formed at a position corresponding to the cover plate positioning combination hole on the upper end surface of the enclosing cover plate, and the cover plate positioning combination hole and the cover plate locking hole cooperate to install the enclosing cover plate on the coupling protection partition plate through a locking member.

[0017] Preferably, the installation longitudinal beam is an installation longitudinal beam with a U-shaped structure. An assembly foundation composed of double U-shaped structure installation longitudinal beams ensures that the breaker pole column and the permanent magnet closing and tripping mechanism can maintain the installation surface horizontal and consistent, and the assembly accuracy is high.

[0018] Preferably, the fixed cross beam is of a "凵" structure, the permanent magnet closing and tripping mechanism fixing plate and the vacuum chamber fixing plate are arranged in parallel, a fixed support rib plate is arranged between the permanent magnet closing and tripping mechanism fixing plate and the vacuum chamber fixing plate, an inner closing and tripping positioning installation hole group and an outer closing and tripping positioning installation hole group are formed on the permanent magnet closing and tripping mechanism fixing plate, and vacuum chamber fixing holes are arranged in parallel on the vacuum chamber fixing plate.

[0019] Preferably, after the static contact combination structure, the insulator fixing structure, the control fixing structure, the coupling protection partition plate and the installation longitudinal beam are spliced and combined, they are combined by laser welding.

[0020] Compared with the prior art, the beneficial effects of the present utility model include:

[0021] The vacuum circuit breaker frame with air-insulated permanent magnet mechanism provided by the present utility model assembles each fixed assembly mechanism and the installation longitudinal beam by adopting a combined structure of slot type and卡位 type positioning, which can quickly and accurately complete the fixed combination of the circuit breaker frame, provide an accurate installation and combination positioning basis for the components, and at the same time, a coupling protection partition is arranged outside the manual opening and closing control mechanism. Further, a surrounding cover plate is provided at the upper end, and through double protection, it can comprehensively protect the manual opening and closing control mechanism and the permanent magnet opening and closing mechanism, and extend the service life of the components inside the circuit breaker frame. In the present utility model, the fixed cross beam is designed as a "凵" structure combined with installation rib plates, which can provide sufficient support for the assembly of the permanent magnet opening and closing mechanism and the vacuum chamber of the circuit breaker, and the installation combination is more firm and reliable. After the insertion and alignment combination of each plate of the vacuum circuit breaker frame with air-insulated permanent magnet mechanism provided by the present utility model, laser welding is used for combined processing, which can avoid the deformation of the plates caused by traditional welding, and can further improve the production efficiency. The formed circuit breaker frame has high precision and high overall stiffness, thus ensuring the forming quality and mechanical strength of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. is an assembly schematic diagram of the vacuum circuit breaker frame with air-insulated permanent magnet mechanism provided by the present utility model.

[0023] Figure 2 FIG. is an internal assembly schematic diagram of the vacuum circuit breaker frame with air-insulated permanent magnet mechanism provided by the present utility model.

[0024] Figure 3 FIG. is a structural schematic diagram of the vacuum circuit breaker frame with air-insulated permanent magnet mechanism provided by the present utility model.

[0025] Figure 4 FIG. is a disassembled schematic diagram of the vacuum circuit breaker frame with air-insulated permanent magnet mechanism provided by the present utility model.

[0026] Figure 5 FIG. is an exploded schematic diagram of the vacuum circuit breaker frame with air-insulated permanent magnet mechanism provided by the present utility model.

[0027] Figure 6 FIG. is a schematic diagram of the static contact combination structure of the vacuum circuit breaker frame with air-insulated permanent magnet mechanism provided by the present utility model.

[0028] Figure 7 FIG. is a schematic diagram of the insulator fixing structure of the vacuum circuit breaker frame with air-insulated permanent magnet mechanism provided by the present utility model.

[0029] Figure 8 FIG. is a schematic diagram of the control fixing structure of the vacuum circuit breaker frame with air-insulated permanent magnet mechanism provided by the present utility model.

[0030] Description of the reference numerals in the drawings:

[0031] Installation longitudinal beam-1, static contact installation part-2, insulator installation part-3, control connection mechanism installation part-4, disconnector assembly part-5, manual opening combination part-6, static contact installation beam-7, static contact installation base plate-8, first insulator assembly beam-9, second insulator assembly beam-10, set fixed beam-11, permanent magnetic opening and closing mechanism fixing plate-12, vacuum chamber fixing plate-13, shaft protection partition-14, surrounding cover plate-15, embedded block-16, embedded Slot 17, limit plug-in block 18, limit socket 19, limit slot 20, support plate limit slot 21, insulator support plate 22, fixed block 23, beam socket 24, mounting rib 25, combination slot 26, combination block 27, disconnector shaft support hole 28, disconnector operation combination hole 29, manual disconnect shaft combination hole 30, manual disconnect shaft protection baffle 31, manual disconnect switch installation hole 32, cover plate positioning combination hole 33, cover plate locking hole 34. DETAILED DESCRIPTION

[0032] The utility model is further described below in conjunction with specific implementation methods. The drawings are only used for exemplary descriptions, and are only schematic diagrams, not actual pictures, and cannot be understood as limiting this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0033] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] The present invention is further described below with reference to specific embodiments and accompanying drawings:

[0035] Figures 1 to 8It is a schematic diagram of each structure of the utility model. Further, the utility model is an air-insulated permanent magnet mechanism vacuum circuit breaker frame, including a mounting longitudinal beam 1, the mounting longitudinal beam 1 is provided with a static contact mounting part 2, an insulator mounting part 3, a control connection mechanism mounting part 4, an isolating switch assembly part 5, and a manual opening switch assembly part 6, a static contact assembly structure is assembled between the static contact mounting parts 2 of the mounting longitudinal beam 1 through a card slot embedding fit, an insulator fixing structure is assembled between the insulator mounting parts 3 of the mounting longitudinal beam 1 through a plug-in type limit fit, a control fixing structure is assembled between the control connection mechanism mounting parts 4 of the mounting longitudinal beam 1 through a plug-in type limit fit, an isolating switch control mechanism is assembled in the isolating switch assembly part 5, a manual opening switch control mechanism is assembled in the manual opening switch assembly part 6, and a coupling shaft protection partition 14 is assembled at the upper end of the manual opening switch assembly part 6 and located outside the manual opening switch control mechanism.

[0036] Preferably, the static contact assembly structure includes a static contact mounting beam 7 and a static contact mounting base plate 8, and embedded card blocks 16 are provided on both sides of the static contact mounting beam 7 and the static contact mounting base plate 8. An embedded card slot 17 is provided on the outer side of the static contact mounting portion 2, and the embedded card block 16 and the embedded card slot 17 are mutually embedded and limited. The insulator fixing structure includes a first insulator assembly beam 9 and a second insulator assembly beam 10, and limiting blocks 18 are provided on both sides of the first insulator assembly beam 9 and the second insulator assembly beam 10. A limiting plug hole 19 and a limiting card slot 20 are provided in the insulator mounting portion 3, and the limiting plug block 18 is respectively inserted and locked with the limiting plug hole 19 and the limiting card slot 20. The first insulator A support plate limiting groove 21 is provided on the outer side of the assembly beam 9, and an insulator support plate 22 is installed in the support plate limiting groove 21. The upper end of the insulator support plate 22 is arranged against the lower end surface of the second insulator assembly beam 10. The control fixing structure includes symmetrically arranged fixed beams 11, and connecting rod movable gaps are provided between the fixed beams 11. Fixed blocks 23 are provided on both sides of the fixed beams 11. A beam insertion hole 24 is provided in the control connection mechanism mounting part 4, and the fixed block 23 is inserted and fixed in the beam insertion hole 24. A permanent magnetic opening and closing mechanism fixing plate 12 and a vacuum chamber fixing plate 13 are provided on the fixed beam 11, and a mounting rib 25 is provided between the permanent magnetic opening and closing mechanism fixing plate 12 and the mounting longitudinal beam 1.

[0037] Preferably, a combination groove 26 is formed at the combination end of the stationary contact mounting crossbeam 7 , and a combination card block 27 is provided at the butt end of the stationary contact mounting base plate 8 , and the combination card block 27 is inserted into the combination groove 26 .

[0038] Preferably, a disconnecting switch shaft support hole 28 is formed on one side of the disconnecting switch combination part 5, a disconnecting switch operation combination hole 29 is formed on the other side of the disconnecting switch combination part 5, a disconnecting switch shaft support seat is installed in the disconnecting switch shaft support hole 28, a manual tripping shaft combination hole 30 is formed on one side of the manual tripping combination part 6, a manual tripping shaft support bearing is arranged in the manual tripping shaft combination hole 30, a manual tripping shaft protection baffle 31 is installed outside the manual tripping shaft combination hole 30, a manual tripping installation hole 32 is formed on the other side of the manual tripping combination part 6, and a manual tripping transmission seat sleeve is fixedly arranged in the manual tripping installation hole 32.

[0039] Preferably, an enclosing cover plate 15 is installed at the upper end of the installation longitudinal beam 1, and the enclosing cover plate 15 is fixedly covered at the upper end of the installation longitudinal beam 1 through the coupling shaft protection partition plate 14.

[0040] Preferably, the enclosing cover plate 15, the outer end of the permanent magnet closing and tripping mechanism fixing plate 12 and the outer wall of the installation longitudinal beam 1 are combined to form a sealed enclosing isolation structure.

[0041] Preferably, a cover plate positioning combination hole 33 is formed on the upper end surface of the coupling shaft protection partition plate 14, a cover plate locking hole 34 is formed at a position corresponding to the cover plate positioning combination hole 33 on the upper end surface of the enclosing cover plate 15, and the enclosing cover plate 15 is installed on the coupling shaft protection partition plate 14 through cooperation of the cover plate positioning combination hole 33 and the cover plate locking hole 34 by a locking member.

[0042] Preferably, the installation longitudinal beam 1 is an installation longitudinal beam 1 with a U-shaped structure.

[0043] Preferably, the fixed cross beam 11 has a "凵" structure, the permanent magnet closing and tripping mechanism fixing plate 12 and the vacuum chamber fixing plate 13 are arranged in parallel, a fixed support rib plate is arranged between the permanent magnet closing and tripping mechanism fixing plate 12 and the vacuum chamber fixing plate 13, an inner closing and tripping positioning installation hole group and an outer closing and tripping positioning installation hole group are formed on the permanent magnet closing and tripping mechanism fixing plate 12, and vacuum chamber fixing holes are arranged in parallel on the vacuum chamber fixing plate 13.

[0044] Preferably, after the static contact combination structure, the insulator fixing structure, the control fixing structure, the coupling shaft protection partition plate 14 and the installation longitudinal beam 1 are spliced and combined, they are combined by laser welding.

[0045] First embodiment:

[0046] In this embodiment, during production and processing, after the combined block 27 of the static contact mounting base plate 8 and the combined groove 26 of the static contact mounting cross beam 7 are embedded and combined, the embedded block 16 of the static contact mounting cross beam 7 and the static contact mounting base plate 8 is embedded and assembled into the embedded card slot 17 outside the static contact mounting portion 2 to complete the combined installation of the static contact combined structure and the mounting longitudinal beam 1.

[0047] The insulator support plate 22 is installed on the first insulator assembly cross beam 9 through the support plate limit groove 21, so that the upper end portion of the insulator support plate 22 abuts against the lower end surface of the second insulator assembly cross beam 10. Then, the limit insertion blocks 18 of the first insulator assembly cross beam 9 and the second insulator assembly cross beam 10 are inserted into the limit insertion holes 19 and the limit card slots 20 of the insulator mounting portion 3 to complete the combined installation of the insulator fixing structure and the mounting longitudinal beam 1.

[0048] The fixed block 23 of the fixed cross beam 11 is aligned and inserted into the cross beam insertion hole 24 of the control connection mechanism mounting portion 4. The two "U" - shaped fixed cross beams 11 are symmetrically installed outside the control connection mechanism mounting portion 4 with the openings facing outward, and the mounting rib plate 25 is installed at the mounting positions of the permanent magnet closing and opening mechanism fixing plate 12 and the mounting longitudinal beam 1 to complete the combined installation of the control fixing structure and the mounting longitudinal beam 1. Finally, the coupling protection partition 14 is installed at the upper end portion of the mounting longitudinal beam 1, and the static contact combined structure, the insulator fixing structure, the control fixing structure, the coupling protection partition 14 and the mounting longitudinal beam 1 are assembled together by laser welding.

[0049] Second Embodiment:

[0050] This embodiment is similar to the first embodiment. An enclosing cover plate 15 is installed at the upper end portion of the mounting longitudinal beam 1 in this embodiment, and the enclosing cover plate 15 is fixedly covered at the upper end portion of the mounting longitudinal beam 1 through the coupling protection partition 14. There is a fixed support rib plate between the permanent magnet closing and opening mechanism fixing plate 12 and the vacuum chamber fixing plate 13. The permanent magnet closing and opening mechanism fixing plate 12 is provided with an inner closing and opening positioning mounting hole group and an outer closing and opening positioning mounting hole group, and the vacuum chamber fixing plate 13 is provided with并列 vacuum chamber fixing holes.

[0051] The grounding static contact is installed on the static contact mounting portion 2 of the air - insulated permanent magnet mechanism vacuum circuit breaker frame, and the disconnector is installed in the disconnector combination portion 5. One end of the disconnector shaft of the disconnector is installed in the disconnector shaft support seat of the disconnector shaft support hole 28, and the other end of the disconnector shaft of the disconnector is connected to the disconnector operating mechanism installed in the disconnector operating combination hole 29.

[0052] The insulator end of the circuit breaker is installed in the first insulator assembly beam 9 and the second insulator assembly beam 10 and locked and fixed. The permanent magnetic opening and closing mechanism is installed above the permanent magnetic opening and closing mechanism fixing plate 12. Permanent magnetic opening and closing mechanisms of different specifications are selected according to the position of the connection hole and aligned with the internal opening and closing positioning installation hole group or the external opening and closing positioning installation hole group to be assembled and installed on the permanent magnetic opening and closing mechanism fixing plate 12. The vacuum chamber of the circuit breaker is installed below the vacuum chamber fixing plate 13. The connecting rod of the circuit breaker passes through the connecting rod activity gap between the fixed beams 11 and is connected to the permanent magnetic opening and closing mechanism.

[0053] The manual brake mechanism is installed in the manual brake assembly 6, one end of the manual brake shaft of the manual brake mechanism is installed in the manual brake shaft support bearing of the manual brake shaft assembly hole 30, and the manual brake shaft protection baffle 31 provides the manual brake shaft with protection and anti-protrusion limit, the other end of the manual brake shaft of the manual brake mechanism is connected to the manual brake operating mechanism installed on the manual brake transmission seat sleeve.

[0054] Align the cover locking hole 34 of the surrounding cover 15 with the cover positioning combination hole 33 on the upper end surface of the coupling protection partition 14, and install the surrounding cover 15 on the coupling protection partition 14 through the locking piece, so that the surrounding cover 15 is covered and fixed on the upper end of the mounting longitudinal beam 1, thereby completing the surrounding protection of the hand opening mechanism and the permanent magnetic opening and closing mechanism.

[0055] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. An air-insulated permanent magnet mechanism vacuum circuit breaker frame, characterized in that: The invention comprises an installation longitudinal beam (1), wherein the installation longitudinal beam (1) is provided with a static contact installation part (2), an insulator installation part (3), a control connection mechanism installation part (4), an isolating switch assembly part (5), and a manual opening switch assembly part (6); a static contact assembly structure is assembled between the static contact installation parts (2) of the installation longitudinal beam (1) through a card slot embedding fit; an insulator fixing structure is assembled between the insulator installation parts (3) of the installation longitudinal beam (1) through a card insertion type limit fit; a control fixing structure is assembled between the control connection mechanism installation parts (4) of the installation longitudinal beam (1) through a card insertion type limit fit; an isolating switch control mechanism is assembled in the isolating switch assembly part (5); a manual opening switch control mechanism is assembled in the manual opening switch assembly part (6); and a coupling shaft protection partition (14) is assembled at the upper end of the manual opening switch assembly part (6) and located outside the manual opening switch control mechanism.

2. The air-insulated permanent magnet mechanism vacuum circuit breaker frame according to claim 1, characterized in that: The static contact assembly structure comprises a static contact mounting crossbeam (7) and a static contact mounting base plate (8), both sides of the static contact mounting crossbeam (7) and the static contact mounting base plate (8) are provided with embedded card blocks (16), the outer side of the static contact mounting portion (2) is provided with an embedded card slot (17), the embedded card block (16) and the embedded card slot (17) are mutually embedded and limited, the insulator fixing structure comprises a first insulator assembly crossbeam (9) and a second insulator assembly crossbeam (10), both sides of the first insulator assembly crossbeam (9) and the second insulator assembly crossbeam (10) are provided with limit plug blocks (18), the insulator mounting portion (3) is provided with a limit plug hole (19) and a limit card slot (20), the limit plug block (18) is mutually inserted and limited with the limit plug hole (19) and the limit card slot (20), the first insulator assembly crossbeam (9) and the second insulator assembly crossbeam (10) are mutually inserted and limited, A support plate limiting groove (21) is formed on the outer side of the cross beam (9), an insulator support plate (22) is installed in the support plate limiting groove (21), the upper end of the insulator support plate (22) is arranged against the lower end surface of the second insulator assembly cross beam (10), the control fixing structure comprises symmetrically arranged fixed cross beams (11), connecting rod movable gaps are provided between the fixed cross beams (11), fixed clamping blocks (23) are provided on both sides of the fixed cross beams (11), a cross beam insertion hole (24) is formed in the control connection mechanism mounting portion (4), the fixed clamping blocks (23) are inserted and fixed in the cross beam insertion hole (24), a permanent magnetic opening and closing mechanism fixing plate (12) and a vacuum chamber fixing plate (13) are provided on the fixed cross beam (11), and a mounting rib plate (25) is provided between the permanent magnetic opening and closing mechanism fixing plate (12) and the mounting longitudinal beam (1).

3. The air-insulated permanent magnet mechanism vacuum circuit breaker frame according to claim 2, characterized in that: A combination slot (26) is formed at the combination end of the stationary contact mounting crossbeam (7), and a combination card block (27) is provided at the butt end of the stationary contact mounting base plate (8), wherein the combination card block (27) is inserted into the combination slot (26).

4. The air-insulated permanent magnet mechanism vacuum circuit breaker frame according to claim 3, characterized in that: One side of the disconnecting switch combination part (5) is provided with a disconnecting switch shaft support hole (28), and the other side of the disconnecting switch combination part (5) is provided with a disconnecting switch operation combination hole (29). A disconnecting switch shaft support seat is installed in the disconnecting switch shaft support hole (28). One side of the manual opening and closing combination part (6) is provided with a manual opening shaft combination hole (30). A manual opening shaft support bearing is arranged in the manual opening shaft combination hole (30). A manual opening shaft protection baffle (31) is installed outside the manual opening shaft combination hole (30). The other side of the manual opening and closing combination part (6) is provided with a manual opening and closing installation hole (32), and a manual opening and closing transmission seat sleeve is fixedly arranged in the manual opening and closing installation hole (32).

5. An air-insulated permanent magnetic mechanism vacuum circuit breaker frame according to any one of claims 2 to 4, characterized in that: An enclosing cover plate (15) is installed at the upper end of the installation longitudinal beam (1), and the enclosing cover plate (15) is fixedly wrapped around the upper end of the installation longitudinal beam (1) through the coupling protection partition plate (14).

6. The air-insulated permanent magnet mechanism vacuum circuit breaker frame according to claim 5, characterized in that: The enclosing cover plate (15), the outer end of the permanent magnet opening and closing mechanism fixing plate (12) and the outer wall of the installation longitudinal beam (1) form a sealed enclosing and isolating structure in combination.

7. The air-insulated permanent magnet mechanism vacuum circuit breaker frame according to claim 6, characterized in that: A cover plate positioning combination hole (33) is opened on the upper end surface of the coupling protection partition plate (14). A cover plate locking hole (34) is opened at a position corresponding to the cover plate positioning combination hole (33) on the upper end surface of the enclosing cover plate (15). The cover plate positioning combination hole (33) and the cover plate locking hole (34) cooperate to install the enclosing cover plate (15) on the coupling protection partition plate (14) through a locking piece.

8. An air-insulated permanent magnetic mechanism vacuum circuit breaker frame according to any one of claims 1 to 4, characterized in that: The installation longitudinal beam (1) is an installation longitudinal beam (1) with a U-shaped structure.

9. An air-insulated permanent magnetic mechanism vacuum circuit breaker frame according to any one of claims 2 or 3, characterized in that: The fixed cross beam (11) has a "凵" structure. The permanent magnet opening and closing mechanism fixing plate (12) and the vacuum chamber fixing plate (13) are arranged parallel to each other. Fixed support rib plates are arranged between the permanent magnet opening and closing mechanism fixing plate (12) and the vacuum chamber fixing plate (13). Inner opening and closing positioning installation hole groups and outer opening and closing positioning installation hole groups are opened on the permanent magnet opening and closing mechanism fixing plate (12). Vacuum chamber fixing holes are arranged side by side on the vacuum chamber fixing plate (13).

10. An air-insulated permanent magnetic mechanism vacuum circuit breaker frame according to any one of claims 1 to 4, characterized in that: After the static contact combination structure, the insulator fixing structure, the control fixing structure, the coupling protection partition plate (14) and the installation longitudinal beam (1) are spliced and combined, they are combined by laser welding.

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