Vacuum circuit breaker structure

Abstract

The utility model relates to a vacuum circuit breaker structure, and belongs to the technical field of vacuum circuit breakers, the vacuum circuit breaker structure comprises a box body, a static contact and a moving contact, the left side wall of the inner cavity of the box body is fixedly provided with an electric control module, and the right side wall of the inner cavity of the box body is fixedly provided with an under-voltage control module and an under-voltage energy storage module; the top of the box body is fixedly provided with wiring terminal connection protection equipment, the interior of the box body is fixedly provided with two partition plates, the opposite sides of the two partition plates are fixedly provided with modular operation mechanisms, and the opposite sides of the two partition plates are provided with linkage assemblies; and the linkage assembly comprises an output connecting arm arranged at the front end of the modularized operating mechanism. According to the vacuum circuit breaker structure, the position of the change-over switch can be changed while the circuit breaker is switched on or switched off, so that the position of the change-over switch can be changed in time, and the phenomena of poor contact of contacts, inflexible switching and the like caused by the fact that the position of the change-over switch is inconvenient to change in time when the switch is switched on or switched off are reduced.

Description

Technical Field

[0001] This application relates to the technical field of vacuum circuit breakers, and specifically to a vacuum circuit breaker structure. Background Art

[0002] A circuit breaker refers to a switching device that can close, carry, and interrupt the current under normal circuit conditions and can carry and interrupt the current under abnormal circuit conditions within a specified time. Circuit breakers usually include vacuum circuit breakers, air circuit breakers, air-blast circuit breakers, sulfur hexafluoride circuit breakers, etc.

[0003] Currently, the requirement for power supply reliability is getting higher and higher. If a circuit breaker fails to trip, serious accidents such as damaging the power grid stability and burning out operating equipment will occur. Chinese Patent (Publication No.: CN 112133593 A) discloses an automatic release structure for a circuit breaker. When the circuit breaker is in the energy storage state, it will automatically release energy through closing and opening operations to improve safety. Since the position of the change-over switch needs to be changed during the closing and opening operations to control the on-off of the current and thus achieve the circuit switching function, but usually the position of the change-over switch is usually changed by the staff after power-off processing of closing and opening, making it inconvenient to drive the change-over switch to move during the closing and opening release, resulting in inconvenient timely change of the position of the change-over switch, thus causing phenomena such as poor contact of contacts and inflexible switches. Utility Model Content

[0004] Aiming at the deficiencies of the prior art, this application provides a vacuum circuit breaker structure, which has the advantages of facilitating linkage operation, etc., and solves the problem of inconvenient linkage operation.

[0005] To achieve the above object, this application provides the following technical solution: A vacuum circuit breaker structure includes a box body, a static contact, and a moving contact. An electronic control module is fixed on the left side wall of the inner cavity of the box body. A under-voltage control module and an under-voltage energy storage module are respectively fixed on the right side wall of the inner cavity of the box body. A wiring terminal is fixed on the top of the box body to connect to a protection device. Two partition plates are fixed inside the box body. A modular operating mechanism is fixed on the opposite sides of the two partition plates. A linkage component is provided on the opposite sides of the two partition plates;

[0006] The linkage component includes an output connecting arm arranged at the front end of the modular operating mechanism. A crank arm is arranged on the left side of the left output connecting arm. A pulling arm is fixed on the left side of the crank arm. The lower end of the pulling arm is hinged to a pulling plate. The other end of the pulling plate is hinged to a lever. A tripping spring is fixed on the left side wall of the lever. The linkage component further includes a conversion structure arranged behind the lever.

[0007] With the above technical solution, it is also possible to change the position of the change-over switch while closing or opening the switch, so as to promptly change the position of the conversion structure, and reduce the phenomena such as poor contact of contacts and inflexible switch caused by the inconvenience of promptly changing the position of the conversion structure when the closing and opening are released.

[0008] Further, two connection holes are provided on the left side of the partition on the left side, the static contact and the moving contact are both fixed in the connection holes, and a closing structure is fixed on the left side wall of the partition on the left side.

[0009] With the above technical solution, the static contact and the moving contact can contact the closing structure.

[0010] Further, a transmission shaft is provided between the crank arm and the output connecting arm, and a through hole is provided on the partition on the left side, and the transmission shaft is rotatably connected to the inside of the through hole.

[0011] With the above technical solution, the output connecting arm can be connected to the crank arm through the transmission shaft, so that the output connecting arm can drive the crank arm to move while moving.

[0012] Further, a star shaft is provided inside the pull arm, a sliding groove is provided on the left side of the partition on the left side, and a moving rod is slidably connected to the inside of the sliding groove.

[0013] With the above technical solution, when the crank arm drives the pull arm to rotate, the position of the pull arm is restricted by the star shaft, so that the pull arm can push the pull plate to move up and down, and the pull plate can limit its moving range on the left partition through the moving rod, so that the pull plate can stably move up and down on the left partition.

[0014] Further, the conversion structure includes a support plate fixed to the rear wall of the inner cavity of the box body, a support rod rotatably connected inside the support plate, a connecting plate fixed to the outer surface of the support rod, and a change-over switch fixed to the right side wall of the connecting plate.

[0015] With the above technical solution, when the support rod rotates, the support rod can drive the change-over switch to move through the connecting plate, so that it is possible to change the position of the change-over switch while closing and opening the switch.

[0016] Further, a rotating hole for the support rod to penetrate through its inside is provided on the left side of the support plate, and a fixing hole for the support rod to be fixed inside it is provided on the right side of the connecting plate.

[0017] With the above technical solution, the support rod can rotate inside the support plate, so that the support rod can stably rotate inside the box body, and the connecting plate is fixed to the outside of the support rod through the fixing hole, so that the connecting plate can be driven to move back and forth when the support rod rotates.

[0018] Further, a rotation hole is formed in the left side wall of the lever, and the support rod is fixed inside the rotation hole.

[0019] With the above technical solution, when the lever flips, the lever can drive the support rod to rotate through the rotation hole.

[0020] Further, connection holes for the support rod to rotate inside are formed on the opposite sides of the two partition plates, and the support plate is located directly to the left of the left partition plate.

[0021] With the above technical solution, the support rod can rotate inside the two partition plates through the two connection holes, and the support rod can penetrate into the two partition plates through the two connection holes, avoiding the two partition plates from affecting the rotation of the support rod and further enhancing the stability of the support rod 78 during rotation.

[0022] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0023] In this vacuum circuit breaker structure, by providing a linkage assembly, the circuit breaker can change the position of the change-over switch while closing or opening the circuit breaker, so as to timely change the position of the change-over switch and reduce the phenomena such as poor contact of the contacts and inflexible switching caused by the inconvenience of timely changing the position of the change-over switch when the closing and opening are released. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the present application;

[0025] Figure 2 It is a schematic diagram of the internal structure of the box body of the present application;

[0026] Figure 3 It is a schematic structural diagram of the support plate and the support rod of the present application;

[0027] Figure 4 It is a schematic left side view structure diagram of the lever and the opening spring of the present application.

[0028] In the figure: 1, box body; 2, electronic control module; 3, under-voltage control module; 4, under-voltage energy storage module; 5, wiring terminal connecting protection device; 6, partition plate; 7, modular operating mechanism; 71, output connecting arm; 72, toggle arm; 73, pull plate; 74, lever; 75, opening spring; 76, pull arm; 77, support plate; 78, support rod; 79, operating rod; 710, connecting plate; 711, change-over switch; 8, static contact; 9, moving contact. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0030] Please refer to Figures 1 to 4 , a vacuum circuit breaker structure in this embodiment includes a box body 1, a static contact 9 and a moving contact 8. An electronic control module 2 is fixed on the left side wall of the inner cavity of the box body 1. An under-voltage control module 3 and an under-voltage energy storage module 4 are respectively fixed on the right side wall of the inner cavity of the box body 1. A wiring terminal for connecting a protection device 5 is fixed on the top of the box body 1. Two partition plates 6 are fixed inside the box body 1. A modular operating mechanism 7 is fixed on one side of the two partition plates 6 facing each other. A linkage assembly is provided on the side of the two partition plates 6 facing away from each other.

[0031] Please refer to Figures 2 to 4 , the linkage assembly in this embodiment includes an output connecting arm 71 arranged at the front end of the modular operating mechanism 7. A crank arm 72 is arranged on the left side of the left output connecting arm 71. A pulling arm 76 is fixed on the left side of the crank arm 72. The lower end of the pulling arm 76 is hinged to a pulling plate 73. The other end of the pulling plate 73 is hinged to a lever 74. A tripping spring 75 is fixed on the left side wall of the lever 74, and the top end of the tripping spring 75 is fixed to the end of the pulling arm 76 away from the pulling plate 73. The linkage assembly further includes a conversion structure arranged at the rear side of the lever 74.

[0032] Among them, two connection holes are opened on the left side of the left partition plate 6. The static contact 9 and the moving contact 8 are both fixed in the connection holes. A closing structure is fixed on the left side wall of the left partition plate 6 so that the static contact 9 and the moving contact 8 can contact the closing structure.

[0033] At the same time, a transmission shaft is arranged between the crank arm 72 and the output connecting arm 71. A through hole is opened on the left partition plate 6. The transmission shaft is rotatably connected inside the through hole so that the transmission shaft can be connected to the crank arm 72 and the output connecting arm 71 respectively. When the modular operating mechanism drives the conveying connecting arm 71 to move, the conveying connecting arm 71 can drive the transmission shaft to rotate in the through hole of the left partition plate 6, so that the transmission shaft can drive the crank arm 72 to move, so that when the conveying connecting arm 71 moves, the transmission shaft can indirectly drive the crank arm 72 to move.

[0034] Moreover, a star-shaped shaft is rotatably connected inside the pulling arm 76. The star-shaped shaft is fixed to the left side wall of the left partition plate 6. A circular hole for the star-shaped shaft to rotate inside is provided inside the pulling arm 76. When the output connecting arm 71 drives the crank arm 72 to move through the transmission shaft, the pulling arm 76 rotates around the star-shaped shaft due to the star-shaped shaft. The pulling arm 76 forms an inclined shape with the closing spring 75 due to the star-shaped shaft. Thus, when the crank arm 72 drives the pulling arm 76 to rotate, the pulling arm 76 can push and pull the pulling plate 73 to move downward or upward, so that the pulling plate 73 can pull the lever 74 to flip and rotate. Moreover, a sliding groove is provided on the left side of the left partition plate 6. A moving rod is slidably connected inside the sliding groove. The pulling plate 73 can be stably moved on the left partition plate 6 through the moving rod, and the moving range of the pulling handle 73 can also be limited.

[0035] Please refer to Figures 2 to 4 , the conversion structure in this embodiment includes a support plate 77 fixed to the rear wall of the inner cavity of the box body 1, a support rod 78 rotatably connected inside the support plate 77, a connecting plate 79 fixed to the outer surface of the support rod 78, and a conversion switch 710 fixed to the right side wall of the connecting plate 79.

[0036] Secondly, a rotating hole for the support rod 78 to penetrate through its interior is provided on the left side of the support plate 77, so that the support rod 78 can rotate inside the support plate 77, and the support plate 77 can support the support rod 78, enabling the support rod 78 to stably rotate inside the box body 1. A fixing hole for the support rod 78 to be fixed inside is provided on the right side of the connecting plate 79, so that the connecting plate 79 can be fixed to the outside of the support rod 78. When the support rod 78 rotates, the support rod 78 can drive the connecting plate 79 to move back and forth, so that the connecting plate 79 can drive the conversion switch 710 to move, thereby being able to change the position where the conversion switch 710 is located.

[0037] In addition, a rotating hole is provided on the left side wall of the lever 74. The support rod 78 is fixed inside the rotating hole. The lever 74 can be fixed to the outer surface of the support rod 78. When the pulling plate 73 pulls the lever 74 to flip, the lever 74 can drive the support rod 78 to rotate. Thus, when the lever 74 flips and moves, the lever 74 can drive the connecting plate 79 to move through the support rod 78, so that the connecting plate 79 can drive the conversion switch 710 to move.

[0038] Meanwhile, connection holes for the support rod 78 to rotate inside are formed on the opposite sides of the two partition plates 6. The support plate 77 is located directly to the left of the left partition plate 6, enabling the support rod 78 to rotate inside the two partition plates 6 through the two connection holes. Moreover, the support rod 78 can pass through the two partition plates 6 via the two connection holes, facilitating the connection between the support rod 78 and the connecting plate 79, avoiding interference between the two partition plates 6 and the connection between the support rod 78 and the connecting plate 79. Additionally, the two partition plates 6 can also provide support for the support rod 78, thereby further enhancing the stability of the support rod 78 during rotation within the box body 1.

[0039] It should be noted that the electronic control module 2, undervoltage control module 3, undervoltage energy storage module 4, connection terminal connection protection device 5, modular operating mechanism 7, and transfer switch 710, as well as the electronic components mentioned in the text, are all publicly disclosed in the prior art. Moreover, the electrical components mentioned in the text are all connected to the controller and the power supply. The control method of this new embodiment is controlled by the controller, and the control circuit of the controller can be achieved by simple programming by those skilled in the art. The provision of the power supply also belongs to the well-known common knowledge in the art. Therefore, the control method and circuit connection of this utility model will not be explained in detail.

[0040] The working principle of the above embodiment is as follows:

[0041] During use, when the moving contact 8 or the static contact 9 comes into contact with the closing structure, the modular operating mechanism 7 receives an instruction, causing the modular operating mechanism 7 to drive the output connecting arm 71 to move. The output connecting arm drives the crank arm 72 to move through the transmission shaft. The pull arm 76 pushes the pull plate 73 to move, enabling the pull arm 76 to move upward or downward to effect closing or opening. During closing, the pull arm 76 moves downward, stretching the opening spring 75, which facilitates increasing the opening speed. At the same time, the pull plate 73 drives the lever 74 to flip, causing the lever 74 to drive the support rod 78 to rotate. The support rod 78 drives the transfer switch 710 to move through the connecting plate 79, enabling the position of the transfer switch 710 to be changed while closing or opening, thus enabling timely change of the position of the transfer switch 710 and achieving interlocking operation. This can effectively reduce problems such as poor contact of the contacts and inflexible switching caused by the inability to timely change the position of the transfer switch 710 during the release of closing and opening.

Claims

1. A vacuum circuit breaker structure, comprising a box body (1), a static contact (9) and a moving contact (8), characterized in that: On the left side wall inside the box body (1), an electronic control module (2) is fixed. On the right side wall inside the box body (1), an under-voltage control module (3) and an under-voltage energy storage module (4) are respectively fixed. On the top of the box body (1), a terminal connection protection device (5) is fixed. Inside the box body (1), two partition plates (6) are fixed. On the opposite sides of the two partition plates (6), a modular operating mechanism (7) is fixed. On the opposite sides of the two partition plates (6), a linkage assembly is provided; The linkage assembly includes an output connecting arm (71) arranged at the front end of the modular operating mechanism (7). On the left side of the left output connecting arm (71), a crank arm (72) is provided. On the left side of the crank arm (72), a pulling arm (76) is fixed. At the lower end of the pulling arm (76), a pulling plate (73) is hinged. At the other end of the pulling plate (73), a lever (74) is hinged. On the left side wall of the lever (74), a tripping spring (75) is fixed. The linkage assembly further includes a conversion structure arranged at the rear side of the lever (74).

2. The structure of a vacuum circuit breaker according to claim 1, characterized in that: On the left side of the left partition plate (6), two connection holes are opened. The static contact (9) and the moving contact (8) are both fixed in the connection holes. On the left side wall of the left partition plate (6), a closing structure is fixed.

3. A vacuum circuit breaker structure according to claim 1, characterized in that: A transmission shaft is provided between the crank arm (72) and the output connecting arm (71). A through hole is opened on the left partition plate (6), and the transmission shaft is rotatably connected inside the through hole.

4. A vacuum circuit breaker structure according to claim 1, characterized in that: A star-shaped shaft is arranged inside the pulling arm (76). A sliding groove is opened on the left side of the left partition plate (6), and a moving rod is slidably connected inside the sliding groove.

5. A vacuum circuit breaker structure according to claim 1, characterized in that: The conversion structure includes a support plate (77) fixed to the rear wall inside the box body (1). A support rod (78) rotatably connected inside the support plate (77). A connecting plate (79) is fixed to the outer surface of the support rod (78). A conversion switch (710) is fixed to the right side wall of the connecting plate (79).

6. The structure of a vacuum circuit breaker according to claim 5, characterized in that: On the left side of the support plate (77), a rotation hole for the support rod (78) to penetrate through its interior is opened. On the right side of the connecting plate (79), a fixing hole for the support rod (78) to be fixed inside it is opened.

7. A vacuum circuit breaker structure according to claim 5, characterized in that: A rotation hole is opened on the left side wall of the lever (74), and the support rod (78) is fixed inside the rotation hole.

8. A vacuum circuit breaker structure according to claim 5, characterized in that: On the opposite sides of the two partition plates (6), connection holes for the support rod (78) to rotate inside them are both opened. The support plate (77) is located directly to the left of the left partition plate (6).

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