A high voltage permanent magnet vacuum circuit breaker

Abstract

A high-voltage permanent magnetic vacuum circuit breaker belongs to the technical field of permanent magnetic vacuum circuit breakers. It comprises a main frame (9), a plurality of poles (15) are arranged on the upper rear side of the main frame (9), a contact drive shaft (17) is led out from the bottom of the pole (15), a main shaft (8) is rotatably arranged below the pole (15), and the contact drive shaft (17) is hinged to the main shaft (8), and is characterized in that: a leaf spring (3) is arranged on the front side of the main shaft (8) to drive the main shaft (8) to rotate, and the rear end of the leaf spring (3) is connected to the main shaft (8); a swing mechanism for driving the leaf spring (3) to rotate and deform is arranged on one side of the leaf spring (3), and the swing mechanism is rotatably mounted on the side plate (1). In the high-voltage permanent magnetic vacuum circuit breaker, the main shaft is driven to rotate by the deformation of the leaf spring, and finally the closing is completed by the elastic force of the leaf spring. Compared with the traditional manual closing device, it has the advantages of simple structure and small space occupation.

Description

Technical Field

[0001] The invention discloses a high-voltage permanent-magnet vacuum circuit breaker, belonging to the technical field of permanent-magnet vacuum circuit breakers. Background Art

[0002] High-voltage permanent magnetic vacuum circuit breaker is a commonly used electrical component at present. A permanent magnetic mechanism and a pole are arranged in the high-voltage permanent magnetic vacuum circuit breaker. A permanent magnet and an electromagnet are arranged in the permanent magnetic mechanism. A contact is arranged in the pole. The two ends of the pole are the input and output ends of the power supply. In normal use, the electromagnet and the permanent magnet are attracted and separated by supplying power to or disconnecting the power supply to the electromagnet. The output end of the permanent magnetic mechanism is connected to the contact in the pole through a mechanical mechanism. Therefore, when the electromagnet and the permanent magnet are attracted and separated, the contact in the pole is driven to complete the opening and closing actions.

[0003] However, in some cases where the closing operation cannot be achieved through electromagnets, it is necessary to first achieve the closing operation through manual operation in order to complete the power transmission. Therefore, a manual closing mechanism is provided on some high-voltage permanent magnetic vacuum circuit breakers. However, due to the characteristics of the permanent magnetic lock when the permanent magnetic mechanism is closed, the traditional manual closing mechanism needs to be closed through extremely complex mechanical mechanisms such as chains, so it is large in size, which not only makes the installation and maintenance of the manual closing mechanism cumbersome, but also requires a large space, which is easy to affect the comprehensive performance of the circuit breaker. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a high-voltage permanent magnet vacuum circuit breaker which drives the main shaft to rotate by the deformation of the leaf spring and finally completes the closing by the elastic force of the leaf spring. Compared with the traditional manual closing device, the circuit breaker has the advantages of simple structure and small space occupation.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: the high-voltage permanent magnetic vacuum circuit breaker comprises a main frame, side plates are erected on both sides of the main frame, a plurality of poles are arranged above the rear side of the main frame, contacts are arranged in the poles, a contact driving shaft for driving the contacts to move is led out from the bottom of the poles, a main shaft is rotatably arranged below the poles, the contact driving shaft is movably connected to the main shaft, and is characterized in that: a leaf spring for driving the main shaft to rotate is arranged on the front side of the main shaft, and the rear end of the leaf spring is hung with the main shaft; a swing mechanism for driving the leaf spring to rotate and deform is arranged on one side of the leaf spring, and the swing mechanism is rotatably installed on the side plate.

[0006] Preferably, a leaf spring fixing bracket is provided at the rear end of the leaf spring, the rear end of the leaf spring is fixed to the upper surface of the leaf spring fixing bracket, a hook plate is fixed at the rear end of the leaf spring fixing bracket, and a hook body for hanging the main shaft is provided on the hook plate.

[0007] Preferably, a plurality of sets of drive shaft hinge plates corresponding to the contact drive shafts are fixed along the axial direction on the outer ring of the main shaft, one end of the drive shaft hinge plate is fixedly connected to the main shaft, and the other end is movably connected to the contact drive shaft.

[0008] Preferably, a pin plate is arranged on the outer side of the drive shaft hinge plate close to the leaf spring, and a pin is fixed between the pin plate and the drive shaft hinge plate.

[0009] Preferably, a support column that moves forward as the leaf spring rotates is provided below the leaf spring, the support column is hinged inside the leaf spring fixing frame, and a stopping mechanism that prevents the support column from moving forward is also provided below the leaf spring, and the swing mechanism triggers the stopping mechanism to operate.

[0010] Preferably, the stopping mechanism comprises a pressure plate fixing frame, the rear end of which is movably connected, a pressure plate in contact with the swing mechanism is fixed on the upper surface of its front end, a sliding column is fixed behind the pressure plate, and the sliding column protrudes on the forward trajectory of the support column.

[0011] Preferably, a support frame is provided on the surface of the main frame, the rear end of the pressure plate fixing frame is hinged inside the support frame, and the support column moves forward along the upper surface of the support frame; the pressure plate is located at the front end of the support frame, and a trigger hole is opened on the front side of the upper surface of the support frame, and the sliding column passes through the trigger hole from bottom to top and protrudes from the upper surface of the support frame.

[0012] Preferably, the swing mechanism includes a swing plate, a rotating shaft is arranged on the outer end surface of the swing plate, the end of the rotating shaft is the driving end, the rotating shaft of the swing plate passes outward through the side plate and is hinged to the side plate, and the driving end of the swing plate protrudes from the outer surface of the side plate; two sliding columns are arranged on the inner surface of the swing plate: an upper sliding column for driving the leaf spring to deform, located below the upper sliding column, and a lower sliding column for triggering the stopping mechanism, the upper sliding column and the lower sliding column are vertically fixed to the inner surface of the swing plate.

[0013] Preferably, a thrust spring for pushing the pressure plate fixing frame upward is arranged at the lower front part of the pressure plate fixing frame; and a pulling spring for pulling the leaf spring upward is arranged at the upper part of the leaf spring.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In this high-voltage permanent magnet vacuum circuit breaker, the main shaft is driven to rotate by the deformation of the leaf spring, and finally the closing is completed by the elastic force of the leaf spring. Compared with the traditional manual closing device, it has the advantages of simple structure and small space occupation.

[0016] By setting a stopping mechanism, when the swing mechanism triggers the stopping mechanism, the stopping effect on the support column is instantly cancelled, so that the energy accumulated by the deformation of the leaf spring is released, the closing speed requirement during closing is met, and arcing is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the forward structure of a high-voltage permanent magnet vacuum circuit breaker.

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0019] Figure 3 This is a schematic diagram of the rear structure of a high-voltage permanent magnet vacuum circuit breaker.

[0020] Figure 4 for Figure 3 Enlarged view of point B in the middle.

[0021] Figure 5 This is a schematic diagram of the lateral structure of the high-voltage permanent magnet vacuum circuit breaker after omitting the side plate.

[0022] Figure 6 for Figure 5 Enlarged view of center C.

[0023] Wherein: 1, side plate 2, permanent magnet mechanism 3, leaf spring 4, support column 5, sliding column 6, swing plate 7, pressure plate 8, main shaft 9, main frame 10, leaf spring fixing frame 11, upper sliding column 12, lower sliding column 13, pressure plate fixing frame 14, support frame 15, pole 16, pin 17, contact drive shaft 18, drive shaft hinge plate 19, hook plate 20, pin plate. DETAILED DESCRIPTION

[0024] Figures 1 to 6 The best embodiment of the present invention is shown below in conjunction with the attached Figures 1 to 6 The present invention is further described.

[0025] like Figure 1 and Figure 3 As shown, a high-voltage permanent magnetic vacuum circuit breaker includes a main frame 9, a side plate 1 is respectively erected at both ends of the main frame 9, a support plate is erected in the middle of the main frame 9, and a permanent magnetic mechanism 2 is arranged in the upper part of the space between the support plate and the right side plate 1.

[0026] Three poles 15 are arranged side by side at the upper rear end of the main frame 9, and the upper and lower ends of the poles 15 are the incoming and outgoing ends of the power supply respectively. A contact is arranged in each pole 15, wherein a contact driving shaft 17 for driving the moving contact is output from the bottom of the pole 15. A main shaft 8 is arranged below the three poles 15, and the two ends of the main shaft 8 are rotatably installed in the side plates 1 on both sides. The three contact driving shafts 17 led out from the bottom of the pole 15 are respectively hinged with the main shaft 8. When the main shaft 8 rotates, it drives the three contact driving shafts 17 to rise or fall at the same time, realizing the closing and opening of the pole 15. In order to eliminate the arcing phenomenon during the opening and closing, the pole 15 is in a vacuum state.

[0027] Combination Figure 2 A support frame 14 is provided below the permanent magnet mechanism 2, a pressure plate fixing member 13 is provided inside the support frame 14, and the rear end of the pressure plate fixing frame 13 is hinged to the rear part of the support frame 14 (see Figure 4 ), the front end of the pressing plate fixing frame 13 is led out from the front end of the supporting frame 14, and a pressing plate 7 is fixed on the upper surface of the front end of the pressing plate fixing frame 13, and the pressing plate 7 is located on the front side of the supporting frame 14.

[0028] A trigger hole is provided at the front side of the support frame 14, and a slide column 5 is also fixed on the upper surface of the pressure plate fixing frame 13. The slide column 5 is located at the rear side of the pressure plate 7 and directly below the trigger hole at the front end of the support frame 14. A thrust spring (not shown in the figure) is provided at the lower front side of the pressure plate fixing frame 13. The upper end of the thrust spring contacts the bottom of the pressure plate 7, and the lower end is fixed to the surface of the main frame 9. The thrust spring keeps the front end of the pressure plate fixing frame 13 always in an upward trend, that is, when the pressure plate fixing frame 13 is not compressed by external force, under the action of the spring, the pressure plate 7 at the front end of the pressure plate fixing frame 13 is always located at the front side of the upper surface of the support frame 14, and the upper end of the slide column 5 passes through the trigger hole of the support frame 14 and protrudes from the upper surface of the support frame 14.

[0029] Combination Figures 5 and 6 A leaf spring 3 is arranged above the support frame 14, and a leaf spring fixing frame 10 is arranged at the rear end of the leaf spring 3. The rear end of the leaf spring 3 is fixed to the upper surface of the leaf spring fixing frame 10, and the front end of the leaf spring 3 extends to the top of the pressure plate 7. A hook plate 19 is fixed at the rear end of the leaf spring fixing frame 10, and a hook body facing upward is arranged on the hook plate 19. A circular hole is opened in the middle of the hook plate 19, and the aperture of the circular hole is much larger than the diameter of the main shaft 8. The hook plate 19 is sleeved on the outer ring of the main shaft 8 through the circular hole in the middle. A pin plate 20 is arranged on the outside of the hook plate 19, and the pin plate 20 is fixed to the outer ring of the main shaft 8 along the radial direction of the main shaft 8.

[0030] A support column 4 is provided below the leaf spring fixing frame 10, the rear end of the support column 4 is hinged inside the leaf spring fixing frame 10, and the front end thereof is freely drooped to the upper surface of the support frame 14 due to gravity, and the front end of the support column 4 faces the slide column 5 protruding from the upper surface of the support frame 14. A pulling spring (not shown) is provided above the leaf spring 3, the lower end of which is fixed to the rear of the leaf spring 3, and the upper end is fixed to the inner side of the side plate 1. The leaf spring 3 is pulled by the pulling spring so that the front end of the leaf spring 3 always keeps a tendency to move away from the support frame 14, that is, when the leaf spring 3 is not subjected to external pressure, the front end of the leaf spring 3 is always in a tilted state.

[0031] Three sets of drive shaft hinge plates 18 are sequentially arranged along the axial direction of the outer ring of the main shaft 8. The three sets of drive shaft hinge plates 18 are respectively located directly below the three poles 15. The drive shaft hinge plates 18 are fixed to the outer ring of the main shaft 8 along the radial direction of the main shaft 8. Each set of drive shaft hinge plates 18 includes two plates arranged at intervals. The contact drive shaft 17 led out from the bottom of each pole 15 is respectively located between the two drive shaft hinge plates 18 below and is respectively hinged to the drive shaft hinge plates 18 on both sides thereof.

[0032] A pin 16 is fixed between a drive shaft hinge plate 18 closest to the pin plate 20 and the pin plate 20 , and a hook plate 19 is located between the drive shaft hinge plate 18 closest to the pin plate 20 and the pin plate 20 , and the hook body of the hook plate 19 is located directly below the pin 16 .

[0033] A swing plate 6 is also provided on the side plate 1 on one side of the permanent magnet mechanism 2. A rotating shaft is provided on the outer end surface of the swing plate 6. The end of the rotating shaft is a driving end. The rotating shaft of the swing plate 6 passes through the side plate 1 outward and is hinged to the side plate 1. The driving end of the swing plate 6 protrudes from the outer surface of the side plate 1. The driving end of the swing plate 6 has a square cross section, which is convenient for driving the swing plate 6 to rotate by a conventional rectangular socket wrench. A guide shaft is also provided on the outer end surface of the swing plate 6. A guide groove is provided on the side plate 1. The guide shaft of the outer end surface of the swing plate 6 passes through the guide groove at the same time. When the swing plate 6 is forced to swing, the guide shaft and the guide groove play a guiding role.

[0034] Two slide posts are arranged on the inner surface of the swing plate 6: an upper slide post 11 located at the top and a lower slide post 12 located below the upper slide post 11. The rotation axes of the upper slide post 11 and the lower slide post 12 are perpendicular to the inner surface of the swing plate 6, and pulleys are arranged on the rotation axes of the upper slide post 11 and the lower slide post 12 respectively. The upper slide post 11 is located above the leaf spring 3, and the lower slide post 12 is located below the leaf spring 3 and above the pressure plate 7. When the upper slide post 11 contacts the surface of the leaf spring 3 and the leaf spring 3 is not deformed by external force, the lower slide post 12 is separated from the pressure plate 7.

[0035] The specific working process and working principle are as follows:

[0036] When the high-voltage permanent magnetic vacuum circuit breaker needs to be manually closed, first put the socket wrench on the driving end of the swing plate 6, and then press the swing plate 6 down. During the downward pressing of the swing plate 6, the upper sliding column 11 inside the swing plate 6 presses down the leaf spring 3. The leaf spring 3 is forced to move downward and drives the leaf spring fixing frame 10 to move downward. The leaf spring fixing frame 10 moves downward and rotates around the main shaft 8. At this time, the hook body of the hook plate 19 at the rear end of the leaf spring fixing frame 10 gradually approaches the pin 16 and contacts the pin 16.

[0037] Since the support column 4 is hinged inside the leaf spring fixing frame 10, the leaf spring fixing frame 10 moves downward and pushes the support column 4 to slide forward along the surface of the support frame 14. When the front end of the support column 4 contacts the sliding column 5, the support column 4 cannot continue to slide forward. At this time, the swing plate 6 continues to rotate, and the leaf spring 3 begins to deform under the pressure of the upper sliding column 11. The deformation process of the leaf spring 3 is the process of accumulating force.

[0038] When the leaf spring 3 is deformed, the upper slide column 11 always slides along the upper surface of the leaf spring 3, and at this time, the lower slide column 12 gradually approaches the pressure plate 7. When the lower slide column 12 contacts the pressure plate 7, it starts to press the pressure plate 7 downward. After the pressure plate 7 is pressed, it drives the pressure plate fixing frame 13 to swing downward. While the pressure plate fixing frame 13 swings downward, it drives the slide column 5 to move downward and gradually detach from the trigger hole of the support frame 14. When the slide column 5 detaches from the trigger hole, the front end of the support column 4 suddenly loses its obstruction and extends forward, instantly releasing the elastic force accumulated in the leaf spring 3. Since the front end of the leaf spring 3 is still pressed by the upper slide column 11 at this time, the rear end of the leaf spring 3 instantly bounces up after the elastic force is released.

[0039] After the rear end of the leaf spring 3 bounces up, the leaf spring fixing frame 10 drives the hook plate 19 to bounce up. When the hook plate 19 bounces up, the hook body drives the pin 16 to rise. When the pin 16 rises, the pin plates 20 fixed at both ends and the drive shaft hinge plate 18 drive the main shaft 8 to rotate. After the main shaft 8 rotates, it rises through the three sets of drive shaft hinge plates 18 fixed on its outer ring at the same time. The three sets of drive shaft hinge plates 18 respectively drive the three contact drive shafts 17 hinged therein to rise, and the contact drive shafts 17 drive the moving contacts in the corresponding poles 15 to move, completing the closing.

[0040] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A high-voltage permanent magnetic vacuum circuit breaker, comprising a main frame (9), side plates (1) are erected on both sides of the main frame (9), a plurality of poles (15) are arranged above the rear side of the main frame (9), contacts are arranged in the poles (15), a contact drive shaft (17) for driving the contacts is led out from the bottom of the pole (15), a main shaft (8) is rotatably arranged below the pole (15), and the contact drive shaft (17) is movably connected to the main shaft (8), characterized in that: A leaf spring (3) for driving the main shaft (8) to rotate is arranged on the front side of the main shaft (8), and the rear end of the leaf spring (3) is connected to the main shaft (8); a swing mechanism for driving the leaf spring (3) to rotate and deform is arranged on one side of the leaf spring (3), and the swing mechanism is rotatably mounted on the side plate (1); A leaf spring fixing frame (10) is provided at the rear end of the leaf spring (3), the rear end of the leaf spring (3) is fixed to the upper surface of the leaf spring fixing frame (10), a hook plate (19) is fixed at the rear end of the leaf spring fixing frame (10), and a hook body for hanging the main shaft (8) is provided on the hook plate (19); A plurality of sets of drive shaft hinge plates (18) corresponding one to one with the contact drive shafts (17) are fixed on the outer ring of the main shaft (8) along its axial direction, one end of the drive shaft hinge plate (18) is fixedly connected to the main shaft (8), and the other end is movably connected to the contact drive shaft (17); A pin plate (20) is arranged on the outer side of the drive shaft hinge plate (18) close to the leaf spring (3), and a pin (16) is fixed between the pin plate (20) and the drive shaft hinge plate (18); A support column (4) is provided below the leaf spring (3) and moves forward as the leaf spring (3) rotates. The support column (4) is hinged inside the leaf spring fixing frame (10). A stop mechanism is also provided below the leaf spring (3) to prevent the support column (4) from moving forward. The swing mechanism triggers the stop mechanism to operate. The stop mechanism comprises a pressure plate fixing frame (13), the rear end of the pressure plate fixing frame (13) is movably connected, a pressure plate (7) in contact with the swing mechanism is fixed on the upper surface of the front end thereof, a slide column (5) is fixed behind the pressure plate (7), and the slide column (5) protrudes and is located on the forward trajectory of the support column (4); A support frame (14) is arranged on the surface of the main frame (9); the rear end of the pressure plate fixing frame (13) is hinged inside the support frame (14); the support column (4) moves forward along the upper surface of the support frame (14); the pressure plate (7) is located at the front end of the support frame (14); a trigger hole is opened on the front side of the upper surface of the support frame (14); the sliding column (5) passes through the trigger hole from bottom to top and protrudes from the upper surface of the support frame (14); The swing mechanism comprises a swing plate (6), the outer end surface of the swing plate (6) is provided with a rotating shaft, the end of the rotating shaft is a driving end, the rotating shaft of the swing plate (6) passes through the side plate (1) outwardly and is hinged to the side plate (1), and the driving end of the swing plate (6) protrudes from the outer surface of the side plate (1); two sliding columns are provided on the inner surface of the swing plate (6): an upper sliding column (11) for driving the leaf spring (3) to deform, located below the upper sliding column (11), and a lower sliding column (12) for triggering the stop mechanism, the upper sliding column (11) and the lower sliding column (12) being vertically fixed to the inner surface of the swing plate (6).

2. The high voltage permanent magnet vacuum circuit breaker according to claim 1, characterized in that: A thrust spring for pushing the pressure plate fixing frame (13) upwards is arranged at the lower front part of the pressure plate fixing frame (13); and a pulling spring for pulling the leaf spring (3) upwards is arranged at the upper part of the leaf spring (3).

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