Safe grounding three-station vacuum circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a safely grounded three-position vacuum circuit breaker, which comprises a circuit breaker main body, wiring terminals, a mounting rack, a switch and a connecting plate, the wiring terminals are arranged at the upper end and the lower end of the circuit breaker main body, the rear side of the circuit breaker main body is connected with the mounting rack, and the front side of the circuit breaker main body is provided with the switch. A connecting plate is fixed at the front end of the switch, a mounting mechanism is arranged on the rear side of the circuit breaker main body, the circuit breaker main body is connected with the mounting rack through the mounting mechanism, and a grounding end is fixed at the rear end of the circuit breaker main body. According to the three-station vacuum circuit breaker with the safe grounding function, the grounding processing of the circuit breaker main body can be realized through the connection of the grounding end and the guide plate, so that the electric leakage of the circuit breaker main body is avoided, the grounding does not need additional line connection, the connection can be automatically completed after the circuit breaker main body is installed, the operation is convenient and rapid, and the missing connection of personnel can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a three-position vacuum circuit breaker with safe grounding. Background Art

[0002] A circuit breaker is a common circuit protector that can automatically disconnect the circuit when a circuit fault occurs. Depending on its usage requirements, the circuit breaker can also be distributed as a single-position circuit breaker, a three-position circuit breaker, or other multi-position circuit breakers. The application number is CN202410309119.0. A three-position vacuum circuit breaker disclosed on May 7, 2024, includes an end frame, a vacuum switch, an isolating switch, and a lower branch busbar structure. The vacuum switch is arranged on the end frame, and the pull rod structure for closing or opening the vacuum switch passes through the end frame; the isolating switch is arranged on the end frame, and one end of the threaded rod that drives the contact slider to ground or isolate and close the isolating switch passes through the end frame; the vacuum switch is provided with a first power connection socket, the isolating switch is provided with a second power connection socket, and the isolating switch is provided with an upper lead-out busbar; the end frame is provided with a support frame, and at least one support portion is provided between the support frame and the isolating switch. For the structural design of the vacuum switch and disconnector in the three-position vacuum circuit breaker, a support frame is used to cooperate with the end frame plate to provide support points to support the vacuum switch and disconnector, thereby improving the stability of the overall structure, thereby improving the service life and safety;

[0003] The application number is CN202011025476.2, and a grounding circuit breaker disclosed on May 12, 2023 includes a front cover, a base and a rear cover, the front cover includes an upper shell and a front shell, and a first bolt and a wire loading device are provided on the upper shell; the wire loading device includes a handle, an elastic connector, a connecting block, a transmission member, a friction member and a clamping block, one end of the handle is exposed to the upper shell, the other end of the handle is connected to one end of the elastic connector, and the other end of the elastic connector is hinged to the connecting block; the transmission member connects the connecting block and the friction member; a clamping slot is provided in the clamping block, and a wire passing slot is also provided in the wire loading device, and the wire passing slot is used to allow the wire core to pass through, and the friction surface of the friction member is arranged facing the wire core, so that the friction member drives the wire core to move into the clamping slot of the clamping block through friction force under the push of the transmission member, thereby clamping the wire core. The grounding circuit breaker has the advantages of simple and convenient wiring and the wire core is not easy to loosen;

[0004] Current circuit breakers need to be grounded when in use, and sometimes a separate ground wire connection and installation is required for the grounding of the circuit breaker, which increases the complexity and time of circuit breaker installation. In addition, workers may miss a connection, which may lead to potential safety hazards in electricity use. In addition, the circuit breaker has no anti-push protection structure after being disconnected, and there is a risk of workers accidentally closing the circuit breaker when repairing the equipment. Utility Model Content

[0005] The purpose of the utility model is to provide a three-position vacuum circuit breaker with safe grounding, so as to solve the problem that the current circuit breaker needs to be grounded when in use, and the grounding of the circuit breaker sometimes requires a separate ground wire connection and installation, which increases the complexity and time of the installation of the circuit breaker, and may cause hidden dangers of electrical safety when workers miss the connection, and the circuit breaker has no anti-push protection structure after disconnection, so there is a risk of accidental closing of the circuit breaker when workers are repairing the equipment.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a three-position vacuum circuit breaker with safe grounding, comprising a circuit breaker body, a terminal, a mounting frame, a switch and a connecting plate, wherein the terminal is arranged at the upper and lower ends of the circuit breaker body, and the rear side of the circuit breaker body is connected with the mounting frame, and the front side of the circuit breaker body is provided with a switch, and the front end of the switch is fixed with a connecting plate, and the rear side of the circuit breaker body is provided with a mounting mechanism, the circuit breaker body is connected to the mounting frame through the mounting mechanism, and the rear end of the circuit breaker body is fixed with a grounding terminal, the rear end of the grounding terminal is fitted with a guide plate, and the rear end of the guide plate is connected with a ground wire, and the guide plate is located on the inner side of the mounting frame, and the front side of the guide plate is provided with a through groove, and the through groove is opened inside the mounting frame to provide a moving channel for the grounding terminal, and the front end of the guide plate is connected with a front pulling auxiliary mechanism to keep the guide plate and the grounding terminal in close contact, and the front side of the connecting plate is provided with an anti-push protection mechanism to prevent the connecting plate from being pushed up.

[0007] Further optimizing the technical solution, the mounting mechanism includes a mounting plate and a mounting hole;

[0008] The mounting plate is fixed to the rear side of the circuit breaker body, and the mounting plate is arranged horizontally;

[0009] The mounting holes are opened on the upper and lower sides of the mounting frame, and the mounting holes are evenly distributed on the mounting frame. The mounting plate and the mounting holes are connected by bolts.

[0010] To further optimize the technical solution, the front-pull auxiliary mechanism is composed of a first spring, the first spring is fixed at the front end of the guide plate, and the front end of the first spring is connected to the mounting frame to provide a forward pulling force for the mounting frame, and the first spring is made of insulating material.

[0011] To further optimize the technical solution, the anti-push protection mechanism includes a movable plate, a support seat, a second spring and a limit mechanism;

[0012] A movable plate, arranged at the front side of the connecting plate;

[0013] The support seat is fixed on the front side of the circuit breaker body, and the movable plate passes through the support seat and forms an up-and-down sliding structure between the support seats;

[0014] A second spring is arranged below the support seat to provide a downward push-back force for the movable plate;

[0015] The limiting mechanism is arranged on the rear side of the movable plate.

[0016] To further optimize the technical solution, the limiting mechanism includes a limiting block, a third spring, a slot and a locking structure;

[0017] A limit block is arranged at the rear side of the movable plate and between the movable plate to form a front-rear sliding structure;

[0018] A third spring is fixed to the front side of the limit block to provide a rear thrust for the limit block;

[0019] A card slot is provided on the surface of the connecting plate and connected to the limit block;

[0020] The locking structure is arranged below the limit block to lock the movement of the movable plate.

[0021] To further optimize the technical solution, the upper end of the limit block is designed with an arc-shaped structure, and when pressed down by the connecting plate, the third spring is compressed to move.

[0022] To further optimize the technical solution, the locking structure includes a locking rod, a fixing block and a groove;

[0023] A locking rod is arranged inside the movable plate and is threadedly connected between the movable plates;

[0024] A fixed block is fixed above the support seat, and the fixed block is located at the rear side of the movable plate;

[0025] The groove is arranged on the front side of the fixing block, and a concave-convex matching structure is formed between the groove and the locking rod.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] (1) The grounding of the circuit breaker body can be achieved by connecting the grounding terminal and the guide plate, thereby preventing leakage. The grounding does not require additional line connection and can be automatically connected after the circuit breaker body is installed. This is convenient and quick, and can also prevent personnel from missing connections.

[0028] (2) A first spring on the front side of the guide plate provides a forward pulling force for the guide plate so that the guide plate can maintain stable contact with the grounding terminal, thereby ensuring the stability of the grounding of the circuit breaker body;

[0029] (3) The circuit breaker body can be installed on the mounting frame by matching the mounting plate and the mounting hole, and the mounting position of the circuit breaker body can be flexibly adjusted to adapt to different installation requirements;

[0030] (4) The blocking of the connection plate by the limit block can prevent the switch from being pushed up directly, and the switch can automatically squeeze the limit block when it rotates downward after being disconnected so that it can move smoothly to the bottom of the limit block and be limited, thereby improving its safety in use;

[0031] (5) The movement of the movable plate can be locked by connecting the locking rod and the groove. After the movable plate stops moving, the upward push of the connecting plate is blocked by the limit block, so that the switch cannot be turned on. After the subsequent maintenance is completed, the locking rod can be controlled to rotate by tools. After the limit is released, the connecting plate can be pushed up to turn on the switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0033] Figure 2 This is a rear view structural diagram of the utility model;

[0034] Figure 3 This is a schematic diagram of the three-dimensional structure of the main body of the circuit breaker of the utility model;

[0035] Figure 4 This is a schematic diagram of the three-dimensional structure of the mounting frame of the utility model;

[0036] Figure 5 This is a schematic diagram of the top-sectional structure of the mounting frame of the utility model;

[0037] Figure 6 It is a schematic diagram of the side section structure of the movable plate of the utility model.

[0038] In the figure: 1. circuit breaker body; 2. wiring terminal; 3. mounting frame; 4. switch; 5. connecting plate; 6. mounting plate; 7. mounting hole; 8. grounding terminal; 9. guide plate; 10. ground wire; 11. first spring; 12. through groove; 13. movable plate; 14. support seat; 15. second spring; 16. limit block; 17. third spring; 18. slot; 19. locking rod; 20. fixing block; 21. groove. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] See also Figure 1-Figure 6The utility model provides the following technical solution: a three-position vacuum circuit breaker with safe grounding, comprising a circuit breaker body 1, a terminal 2, a mounting frame 3, a switch 4 and a connecting plate 5, wherein the terminal 2 is arranged at the upper and lower ends of the circuit breaker body 1, and the mounting frame 3 is connected to the rear side of the circuit breaker body 1, and the switch 4 is arranged on the front side of the circuit breaker body 1, and the connecting plate 5 is fixed to the front end of the switch 4;

[0041] Embodiment 1:

[0042] This embodiment provides a technical solution, which discloses that a mounting mechanism is provided at the rear side of a circuit breaker body 1, the circuit breaker body 1 is connected to a mounting frame 3 through the mounting mechanism, and a grounding terminal 8 is fixed to the rear end of the circuit breaker body 1, a guide plate 9 is attached to the rear end of the grounding terminal 8, and a ground wire 10 is connected to the rear end of the guide plate 9, and the guide plate 9 is located on the inner side of the mounting frame 3, a through slot 12 is provided on the front side of the guide plate 9, and the through slot 12 is opened inside the mounting frame 3 to provide a moving channel for the grounding terminal 8, a front pull auxiliary mechanism is connected to the front end of the guide plate 9 to keep the guide plate 9 and the grounding terminal 8 in close contact, and an anti-push protection mechanism is provided on the front side of the connecting plate 5 to prevent the connecting plate 5 from being pushed up;

[0043] When in use, the circuit breaker body 1 can be installed on the mounting frame 3, the grounding terminal 8 and the guide plate 9 are connected, and the ground wire 10 on the guide plate 9 is connected to the external grounding to realize the grounding protection of the circuit breaker body 1. After the circuit breaker body 1 is installed, the grounding will be automatically completed. At the same time, after the tripping phenomenon occurs, the anti-push protection mechanism can block the upward push of the connecting plate 5 to prevent it from being accidentally pushed up.

[0044] Embodiment 2:

[0045] On the basis of the first embodiment, the mounting mechanism is disclosed, including a mounting plate 6 and a mounting hole 7, wherein the mounting plate 6 is fixed to the rear side of the circuit breaker body 1, and the mounting plate 6 is arranged horizontally, the mounting holes 7 are opened on the upper and lower sides of the mounting frame 3, and the mounting holes 7 are evenly distributed on the mounting frame 3, the mounting plate 6 and the mounting holes 7 are connected by bolts, the front pull auxiliary mechanism is composed of a first spring 11, the first spring 11 is fixed to the front end of the guide plate 9, and the front end of the first spring 11 is connected to the mounting frame 3 to provide a forward pulling force for the mounting frame 3, and the first spring 11 is made of an insulating material;

[0046] When installing the circuit breaker body 1, it can be moved to the front side of the mounting frame 3, and the mounting plate 6 can be moved to a position relative to the mounting hole 7. Then, the mounting plate 6 and the mounting frame 3 can be connected by connecting the mounting bolts and the mounting holes 7. After the circuit breaker body 1 is installed, the grounding terminal 8 will push the guide plate 9 to move backward. Under the pulling force of the first spring 11, the guide plate 9 is kept in close contact with the grounding terminal 8 to ensure the effectiveness of subsequent grounding.

[0047] Embodiment three:

[0048] On the basis of the first embodiment, an anti-push protection mechanism is disclosed, which includes a movable plate 13, a support seat 14, a second spring 15 and a limiting mechanism. The movable plate 13 is arranged on the front side of the connecting plate 5, the support seat 14 is fixed on the front side of the circuit breaker body 1, the movable plate 13 passes through the support seat 14 and the support seat 14 forms an up and down sliding structure, the second spring 15 is arranged below the support seat 14 to provide a push-down reset force for the movable plate 13, the limiting mechanism is arranged on the rear side of the movable plate 13, the limiting mechanism includes a limiting block 16, a third spring 17, a card slot 18 and a locking structure, the limiting block 16 is arranged on the rear side of the movable plate 13 and between the movable plate 13 to form a front and back sliding structure, the third spring 17 is fixed on the front of the limiting block 16 The side provides a rear thrust for the limit block 16, the card slot 18 is opened on the surface of the connecting plate 5 and connected to the limit block 16, the locking structure is arranged below the limit block 16 to lock the movement of the movable plate 13, the upper end of the limit block 16 is designed in an arc-shaped structure, and when the connecting plate 5 is pressed down, the third spring 17 is compressed to move, and the locking structure includes a locking rod 19, a fixed block 20 and a groove 21, the locking rod 19 is arranged inside the movable plate 13 and between the movable plate 13 to form a threaded connection, the fixed block 20 is fixed above the support seat 14, and the fixed block 20 is located on the rear side of the movable plate 13, the groove 21 is opened on the front side of the fixed block 20, and a concave-convex matching structure is formed between the groove 21 and the locking rod 19;

[0049] When tripping occurs or the switch 4 is closed for maintenance of the line, the connecting plate 5 will move down to the bottom of the limit block 16, so that the limit block 16 provides a limit for the upward push of the connecting plate 5 through the card slot 18, which can prevent the circuit from being accidentally connected and affect the safety of the operators. When it is necessary to push it up, the locking rod 19 can be twisted by a tool to release the connection between the locking rod 19 and the groove 21, so that the movable plate 13 becomes movable, and then the connecting plate 5 can be pushed to push the limit block 16 to drive the movable plate 13 to move upward until the connecting plate 5 moves to the top of the limit block 16, and the movable plate 13 moves downward and resets under the action of the second spring 15, completing the opening control of the switch 4.

[0050] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0051] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A three-position vacuum circuit breaker with safe grounding, comprising a circuit breaker body (1), a terminal (2), a mounting frame (3), a switch (4) and a connecting plate (5), wherein the terminal (2) is arranged at the upper and lower ends of the circuit breaker body (1), the mounting frame (3) is connected to the rear side of the circuit breaker body (1), and the switch (4) is arranged on the front side of the circuit breaker body (1), and the connecting plate (5) is fixed to the front end of the switch (4); Features: The rear side of the circuit breaker body (1) is provided with a mounting mechanism, the circuit breaker body (1) is connected to the mounting frame (3) through the mounting mechanism, and a grounding terminal (8) is fixed to the rear end of the circuit breaker body (1), the rear end of the grounding terminal (8) is fitted with a guide plate (9), the rear end of the guide plate (9) is connected to a ground wire (10), and the guide plate (9) is located inside the mounting frame (3), the front side of the guide plate (9) is provided with a through slot (12), and the through slot (12) is opened inside the mounting frame (3) to provide a moving channel for the grounding terminal (8), the front end of the guide plate (9) is connected with a front pulling auxiliary mechanism to keep the guide plate (9) and the grounding terminal (8) in close contact, and the front side of the connecting plate (5) is provided with an anti-push protection mechanism to prevent the connecting plate (5) from being pushed up.

2. A three-position vacuum circuit breaker with safe grounding according to claim 1, characterized in that: The mounting mechanism comprises a mounting plate (6) and a mounting hole (7); A mounting plate (6) is fixed to the rear side of the circuit breaker body (1), and the mounting plate (6) is arranged in a horizontal shape; The mounting holes (7) are opened on the upper and lower sides of the mounting frame (3), and the mounting holes (7) are evenly distributed on the mounting frame (3). The mounting plate (6) and the mounting holes (7) are connected by bolts.

3. A three-position vacuum circuit breaker with safe grounding according to claim 1, characterized in that: The front pulling auxiliary mechanism is composed of a first spring (11), the first spring (11) is fixed to the front end of the guide plate (9), and the front end of the first spring (11) is connected to the mounting frame (3) to provide a forward pulling force for the mounting frame (3), and the first spring (11) is made of an insulating material.

4. A three-position vacuum circuit breaker with safe grounding according to claim 1, characterized in that: The anti-push protection mechanism comprises a movable plate (13), a support seat (14), a second spring (15) and a limiting mechanism; A movable plate (13) is arranged on the front side of the connecting plate (5); A support seat (14) is fixed on the front side of the circuit breaker body (1), and the movable plate (13) penetrates the support seat (14) and forms an up-and-down sliding structure between the support seat (14); A second spring (15) is arranged below the support seat (14) to provide a downward pushing and restoring force for the movable plate (13); The limiting mechanism is arranged on the rear side of the movable plate (13).

5. A three-position vacuum circuit breaker with safe grounding according to claim 4, characterized in that: The limiting mechanism comprises a limiting block (16), a third spring (17), a clamping slot (18) and a locking structure; A limit block (16) is arranged at the rear side of the movable plate (13) and between the movable plate (13) to form a front-rear sliding structure; A third spring (17) is fixed to the front side of the limit block (16) to provide a rearward thrust for the limit block (16); A card slot (18) is provided on the surface of the connecting plate (5) and is connected to the limiting block (16); A locking structure is arranged below the limit block (16) to lock the movement of the movable plate (13).

6. A three-position vacuum circuit breaker with safe grounding according to claim 5, characterized in that: The upper end of the limit block (16) is designed in an arc-shaped structure, and when pressed downward by the connecting plate (5), the third spring (17) is compressed to move.

7. A three-position vacuum circuit breaker with safe grounding according to claim 5 or 6, characterized in that: The locking structure comprises a locking rod (19), a fixing block (20) and a groove (21); A locking rod (19) is arranged inside the movable plate (13) and is threadedly connected with the movable plate (13); A fixed block (20) is fixed above the support seat (14), and the fixed block (20) is located at the rear side of the movable plate (13); The groove (21) is arranged on the front side of the fixing block (20), and a concave-convex matching structure is formed between the groove (21) and the locking rod (19).

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