A smart circuit breaker contact arm

Abstract

The application provides a kind of intelligent circuit breaker contact arm, belongs to the technical field of electrical fittings, it includes support column;Extension column, extension column is fixedly connected to the side end of support column, extension column is communicated with support column, and the inner wall between extension column is inserted with electrically conductive column;Contact, contact is set between the inner wall of extension column, and contact is fixedly connected to one end of electrically conductive column;And linkage mechanism, linkage mechanism is set between the inner wall of support column and extension column, fixed disc pushes electrically conductive column to move, so that electrically conductive column pushes contact out from extension column, realizes the quick butt joint of contact and contact box in switch cabinet, when movable gear ring resets, eliminate the misplacement of movable gear ring and fixed gear ring, under the push of spring, so that contact is retracted in extension column, realize the contact is pulled out from contact box, avoid relying on voltage element set in circuit breaker to monitor voltage of current, realize autonomous power-off function, prevent contact from burning out, avoid causing economic loss and fire safety hazard.

Description

Technical Field

[0001] This invention belongs to the field of electrical component technology, specifically relating to an intelligent circuit breaker contact arm. Background Technology

[0002] The intelligent circuit breaker mechanism is located on the front of the circuit breaker. The mechanism employs a five-link free-trip mechanism and is designed with energy storage. During operation, the mechanism is always in the pre-energy-stored position, allowing the circuit breaker to close instantly upon receiving a closing command. This is accomplished by either a pre-energy-stored release button or a closing electromagnet. The electric drive mechanism is self-contained, with the energy storage shaft and main shaft connected by a concave-convex wedge joint for easy assembly and disassembly.

[0003] A contact arm is an electrical accessory on a circuit breaker inside a switch cabinet. It is used to fix and install contacts, facilitating electrical connection between the circuit breaker and the high-voltage power supply inside the switch cabinet, and realizing the arc-extinguishing function of the circuit breaker.

[0004] The contact arms used in existing intelligent circuit breakers do not have an autonomous power-off function during use. They rely excessively on voltage monitoring elements installed inside the circuit breaker to trigger the autonomous power-off function. This makes the contacts on the contact arms very easy to burn out and become unusable when encountering overload, resulting in economic losses and fire safety hazards. To address this, we propose an intelligent circuit breaker contact arm. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent circuit breaker contact arm, which aims to solve the problem that the contact arms used in existing intelligent circuit breakers do not have an autonomous power-off function during use, and rely excessively on voltage elements installed inside the circuit breaker to monitor the current and trigger the autonomous power-off function. As a result, the contacts on the contact arm are easily burned out and scrapped when encountering overload, causing economic losses and fire safety hazards.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A smart circuit breaker contact arm includes a support column; An extension column is fixedly connected to the side end of a support column, the extension column is connected to the support column, and a conductive column is inserted between the inner walls of the extension column. A contact, wherein the contact is disposed between the inner walls of the extending post, and one end of the contact is fixedly connected to the conductive post; and A linkage mechanism is provided between the inner walls of the support column and the extension column. The linkage mechanism is connected to the conductive column and is used to move the conductive column.

[0007] In a preferred embodiment of the present invention, the linkage mechanism includes a connecting rod assembly, a misalignment assembly, a guide assembly, and an elastic assembly. The elastic assembly is disposed on the inner wall of the extension column and is connected to the conductive column. The misalignment assembly is disposed between the inner walls of the support column and is connected to the conductive column. The connecting rod assembly is disposed between the inner walls of the support column and is connected to the misalignment assembly. The guide assembly is disposed between the inner walls of the extension column and is connected to the elastic assembly.

[0008] In a preferred embodiment of the present invention, the elastic component includes a limiting ring, an energized collar, and a spring. The limiting ring is sleeved on the circumferential surface of the conductive post and is fixedly connected to the inner wall of the extension post. The energized collar is fixedly connected to the circumferential surface of the conductive post. The spring is disposed between the conductive post and the energized collar, with one end of the spring connected to the energized collar and the other end of the spring connected to the limiting ring.

[0009] As a preferred embodiment of the present invention, the guide assembly includes a limiting rod and a limiting groove. Two limiting grooves are provided, which are formed between the inner walls of the extension column. Two limiting rods are provided, which are fixedly connected to the circumferential surface of the energized collar, and slide between the inner walls of the two limiting grooves.

[0010] In a preferred embodiment of the present invention, the misalignment assembly includes a fixed toothed ring, a positioning post, a fixed disc, a limiting sleeve, and a movable toothed ring. The positioning post is fixedly connected to the inner wall of the support post. Both the fixed toothed ring and the movable toothed ring are sleeved on the circumferential surface of the positioning post. The movable toothed ring is rotatably connected to the inner wall of the support post. The fixed toothed ring and the movable toothed ring mesh with each other. The fixed disc is fixedly connected to the other end of the conductive post. The fixed disc is fixedly connected to the fixed toothed ring. The limiting sleeve is sleeved on the surfaces of the fixed toothed ring and the movable toothed ring. The limiting sleeve is fixedly connected between the inner walls of the support post.

[0011] In a preferred embodiment of the present invention, the linkage assembly includes a driven tie rod, an active tie rod, and an electric push rod. The driven tie rod is fixedly connected to the circumferential surface of the movable toothed ring, the electric push rod is fixedly connected to the inner wall of the support column, and the active tie rod is disposed between the inner walls of the support column. One end of the active tie rod is rotatably connected to the driven tie rod, and the other end of the active tie rod is rotatably connected to the output end of the electric push rod.

[0012] In a preferred embodiment of the present invention, a conductive carbon brush is elastically fixed on the inner wall of the extension column, and the conductive carbon brush is in contact with the energized collar.

[0013] As a preferred embodiment of the present invention, a running indicator light is fixedly connected to the top of the extension column, a magnetic sensor is installed at the bottom of the extension column, the magnetic sensor corresponds to the contact, and a running terminal is fixedly installed at the side end of the support column.

[0014] In a preferred embodiment of the present invention, a mounting plate is fixedly connected to the bottom of the support column.

[0015] In a preferred embodiment of the present invention, the support column, mounting plate, extension column and fixing plate are all made of insulating ceramic.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In this solution, when the movable gear ring deflects around the positioning column as its rotation axis, the movable gear ring and the fixed gear ring are misaligned, causing the fixed gear ring to shift. The fixed gear ring then pushes the fixed plate to move, which in turn pushes the conductive column to move, allowing the conductive column to push the contact out of the extension column. This enables rapid docking of the contact with the contact box within the switch cabinet. When the movable gear ring resets, the misalignment between the movable and fixed gear rings is eliminated. Under the push of the spring, the contact retracts into the extension column, allowing the contact to be pulled out of the contact box. This avoids relying on voltage monitoring elements installed inside the circuit breaker to monitor the current, achieving an autonomous power-off function, preventing contact burnout and scrapping, and avoiding economic losses and fire safety hazards.

[0017] 2. In this design, the two limiting grooves are designed to accommodate the sliding of the two limiting rods. The two limiting rods slide within the two limiting grooves, and the two limiting grooves, through their sliding engagement with the two limiting rods, limit and guide the movement of the energized collar, thereby limiting and guiding the conductive post, and ultimately limiting and guiding the contact. This ensures the smooth movement of the contact, prevents contact displacement, eliminates misalignment friction during contact mating, and prevents the generation of electric arcs. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a first-view perspective perspective view of a contact arm of an intelligent circuit breaker according to the present invention; Figure 2 This is a second-view perspective perspective view of a smart circuit breaker contact arm according to the present invention; Figure 3 This is a first half-sectional view of a contact arm of an intelligent circuit breaker according to the present invention; Figure 4 This is a second half cross-sectional view of a contact arm of an intelligent circuit breaker according to the present invention; Figure 5This is a third half-sectional view of a contact arm of an intelligent circuit breaker according to the present invention; Figure 6 This is a first exploded view of a smart circuit breaker contact arm according to the present invention; Figure 7 This is a second exploded view of a smart circuit breaker contact arm according to the present invention.

[0019] In the diagram: 1. Support column; 2. Mounting plate; 3. Extension column; 4. Limiting ring; 5. Conductive column; 6. Energizing collar; 7. Contact; 8. Limiting rod; 9. Limiting groove; 10. Fixing plate; 11. Spring; 12. Fixing toothed ring; 13. Positioning column; 14. Movable toothed ring; 15. Driven pull rod; 16. Active pull rod; 17. Electric push rod; 18. Conductive carbon brush; 19. Limiting sleeve; 20. Running indicator light; 21. Magnetic sensor; 22. Running terminal. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0021] Reference Figure 1 - Figure 7 A smart circuit breaker contact arm, comprising: Support column 1; Extension column 3 is fixedly connected to the side end of support column 1. Extension column 3 is connected to support column 1. Conductive column 5 is inserted between the inner walls of extension column 3. Contact 7 is disposed between the inner walls of the extension post 3, and contact 7 is fixedly connected to one end of the conductive post 5; and The linkage mechanism is located between the inner walls of the support column 1 and the extension column 3. The linkage mechanism is connected to the conductive column 5 and is used to move the conductive column 5.

[0022] In this invention, the support column 1 is used to support and fix the extension column 3. The extension column 3 is used to accommodate the limiting ring 4, the conductive column 5, the energized collar 6 and the contact 7. The conductive column 5 is used to support and fix the contact 7 and the fixing plate 10. The contact 7 is used to dock with the contact box on the switch cabinet. The linkage mechanism is connected to the conductive column 5 and is used to move the conductive column 5.

[0023] The linkage mechanism includes a linkage assembly, a misalignment assembly, a guide assembly, and an elastic assembly. The elastic assembly is located on the inner wall of the extension column 3 and is connected to the conductive column 5. The misalignment assembly is located between the inner walls of the support column 1 and is connected to the conductive column 5. The linkage assembly is located between the inner walls of the support column 1 and is connected to the misalignment assembly. The guide assembly is located between the inner walls of the extension column 3 and is connected to the elastic assembly.

[0024] In this invention, the elastic component is used to push the contact 7 to reset, the misalignment component is used to push the contact 7 out, the linkage component is used to provide power for the movement of the contact 7, and the guide component is used to limit and guide the movement of the contact 7.

[0025] The elastic component includes a limiting ring 4, an energized collar 6, and a spring 11. The limiting ring 4 is sleeved on the circumferential surface of the conductive post 5 and is fixedly connected to the inner wall of the extension post 3. The energized collar 6 is fixedly connected to the circumferential surface of the conductive post 5. The spring 11 is disposed between the conductive post 5 and the energized collar 6. One end of the spring 11 is connected to the energized collar 6, and the other end of the spring 11 is connected to the limiting ring 4.

[0026] In this invention, the limiting ring 4 is used to support and fix the conductive post 5. At the same time, the limiting ring 4 slides with the contact 7 to limit the movement of the contact 7. The energizing sleeve 6 is used to support and fix the two limiting rods 8. At the same time, the energizing sleeve 6 cooperates with the conductive post 5 to limit the spring 11. The spring 11 pushes the conductive post 5 to move horizontally, and then pulls the contact 7 to retract into the extension post 3, releasing the contact 7 from the contact box in the switch cabinet, so as to facilitate rapid power disconnection.

[0027] The guide assembly includes a limiting rod 8 and a limiting groove 9. There are two limiting grooves 9, which are formed between the inner walls of the extension column 3. There are two limiting rods 8, which are fixedly connected to the circumferential surface of the energized collar 6. The two limiting rods 8 slide between the inner walls of the two limiting grooves 9.

[0028] In this invention, the two limiting grooves 9 are provided to accommodate the sliding of the two limiting rods 8. The two limiting rods 8 slide within the two limiting grooves 9. Through the sliding cooperation between the two limiting grooves 9 and the two limiting rods 8, the movement of the energized collar 6 is limited and guided, thereby limiting and guiding the conductive post 5, and finally limiting and guiding the contact 7. This ensures the smooth movement of the contact 7, prevents the contact 7 from shifting, eliminates the misalignment friction generated when the contact 7 is connected, and prevents the generation of electric arc.

[0029] The misalignment assembly includes a fixed toothed ring 12, a positioning post 13, a fixed disk 10, a limiting sleeve 19, and a movable toothed ring 14. The positioning post 13 is fixedly connected to the inner wall of the support post 1. The fixed toothed ring 12 and the movable toothed ring 14 are both sleeved on the circumferential surface of the positioning post 13. The movable toothed ring 14 is rotatably connected to the inner wall of the support post 1. The fixed toothed ring 12 and the movable toothed ring 14 mesh with each other. The fixed disk 10 is fixedly connected to the other end of the conductive post 5. The fixed disk 10 is fixedly connected to the fixed toothed ring 12. The limiting sleeve 19 is sleeved on the surface of the fixed toothed ring 12 and the movable toothed ring 14. The limiting sleeve 19 is fixedly connected between the inner wall of the support post 1.

[0030] In this invention, the positioning post 13 is used to position the fixed gear ring 12 and the movable gear ring 14, ensuring that the fixed gear ring 12 and the movable gear ring 14 are on the same axis. The fixed disk 10 is used to support the fixed gear ring 12, and the limiting sleeve 19 is used to guide and limit the fixed gear ring 12 and the movable gear ring 14, preventing the fixed gear ring 12 from shifting and falling off. When the movable gear ring 14 deflects about the positioning post 13 as the rotation axis, the movable gear ring 14 and the fixed gear ring 12 are misaligned, pushing the fixed gear ring 12 to shift. The fixed gear ring 12 then pushes the fixed disk 10 to move. The fixed plate 10 pushes the conductive post 5 to move, causing the conductive post 5 to push the contact 7 out of the extension post 3, realizing the quick docking of the contact 7 with the contact box in the switch cabinet. When the movable toothed ring 14 is reset, the misalignment between the movable toothed ring 14 and the fixed toothed ring 12 is eliminated. Under the push of the spring 11, the contact 7 is retracted into the extension post 3, realizing the removal of the contact 7 from the contact box. This avoids relying on the voltage element set in the circuit breaker to monitor the current voltage, realizes the autonomous power-off function, prevents the contact from burning out and being scrapped, and avoids economic losses and fire safety hazards.

[0031] The linkage assembly includes a driven tie rod 15, a driving tie rod 16, and an electric push rod 17. The driven tie rod 15 is fixedly connected to the circumferential surface of the movable toothed ring 14. The electric push rod 17 is fixedly connected to the inner wall of the support column 1. The driving tie rod 16 is disposed between the inner walls of the support column 1. One end of the driving tie rod 16 is rotatably connected to the driven tie rod 15, and the other end of the driving tie rod 16 is rotatably connected to the output end of the electric push rod 17.

[0032] In this invention, the driven pull rod 15 is used to pull the deflection of the movable toothed ring 14, and the electric push rod 17 is used to pull the active pull rod 16 to move. The active pull rod 16 is used to connect the driven pull rod 15 and the electric push rod 17. The output end of the electric push rod 17 pulls the active pull rod 16, which drives the deflection of the driven pull rod 15 and provides power for the movement of the contact 7.

[0033] A conductive carbon brush 18 is elastically fixed on the inner wall of the extension column 3, and the conductive carbon brush 18 is attached to the energized collar 6.

[0034] In this invention, the conductive carbon brush 18 is in contact with the energized collar 6 to smoothly guide the current into the circuit breaker.

[0035] An operating indicator light 20 is fixedly connected to the top of the extension column 3, a magnetic sensor 21 is installed at the bottom of the extension column 3, the magnetic sensor 21 corresponds to the contact 7, and an operating terminal 22 is fixedly installed on the side end of the support column 1.

[0036] In this invention, the operation indicator light 20, the magnetic sensor 21, the conductive carbon brush 18, and the operation terminal 22 are electrically connected. The operation indicator light 20 is used to display the connection status of the contact 7 with the contact box, and then to display whether the contact arm is energized. The magnetic sensor 21 senses whether the contact 7 extends out of the extension column 3 by detecting the change in the magnetic field when the contact 7 moves. At the same time, the magnetic sensor 21 monitors the induced current of the contact 7 and collects the operation data of the contact 7. The operation terminal 22 is used to store the operation data and displays the voltage and current operation data of the entire contact arm, realizing visualization and facilitating observation of the operation data. The operation terminal 22 is electrically connected to the circuit breaker. By sensing the movement status of the contact 7 through the magnetic sensor 21, when the contact 7 moves abnormally, the operation terminal 22 sends abnormal feedback to the circuit breaker, realizing the abnormal feedback function.

[0037] The bottom of the support column 1 is fixedly connected to the mounting plate 2.

[0038] In this invention, the bottom of the mounting plate 2 is provided with multiple mounting holes. By installing screws into the multiple mounting holes, the contact arm can be easily installed on the circuit breaker, achieving quick installation.

[0039] Support column 1, mounting plate 2, extension column 3 and fixing plate 10 are all made of insulating ceramic.

[0040] In this invention, the support column 1, mounting plate 2, extension column 3 and fixing plate 10 are all made of insulating ceramic to prevent current leakage and eliminate the risk of electric shock.

[0041] The working process of the intelligent circuit breaker contact arm provided by this invention is as follows: Install the contact arm on the circuit breaker and inside the switch cabinet. Activate the electric actuator 17. The output of the electric actuator 17 pulls the active actuator 16, which in turn pulls the driven actuator 15 to deflect. The driven actuator 15 pulls the movable gear ring 14 to rotate, causing the movable gear ring 14 to misalign with the fixed gear ring 12. This pushes the fixed gear ring 12 to shift, causing it to move the fixed disk 10. The fixed disk 10 then moves the conductive post 5, which in turn pushes the contact 7 out of the extension post 3, allowing the contact 7 to quickly engage with the contact box. The operation indicator light 20 is continuously illuminated when the operation data in the operation terminal 22 detects a magnetic sensor. When the current collected by 21 is abnormal, the electric push rod 17 is activated. The output end of the electric push rod 17 pulls the active pull rod 16, which in turn pulls the driven pull rod 15 to reset. The driven pull rod 15 drives the movable toothed ring 14 to reset, so that the movable toothed ring 14 meshes with the fixed toothed ring 12. Under the push of the spring 11, the conductive post 5 is reset under the guidance of the two limit rods 8 and the limit groove 9. The conductive post 5 pulls the contact 7 to reset and retract into the extension post 3, thereby pulling the contact 7 out of the contact box. This avoids relying on the voltage element set in the circuit breaker to monitor the current voltage, realizes the autonomous power-off function, prevents the contact from burning out and being scrapped, and avoids economic losses and fire safety hazards.

[0042] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A smart circuit breaker contact arm, characterized in that, include; Support column (1); An extension column (3) is fixedly connected to the side end of a support column (1). The extension column (3) is connected to the support column (1). A conductive column (5) is inserted between the inner walls of the extension column (3). Contact (7), said contact (7) being disposed between the inner walls of the extension post (3), said contact (7) being fixedly connected to one end of the conductive post (5); and The linkage mechanism is located between the inner walls of the support column (1) and the extension column (3), and is connected to the conductive column (5) to move the conductive column (5). The linkage mechanism includes a linkage assembly, a misalignment assembly, a guide assembly, and an elastic assembly. The elastic assembly is disposed on the inner wall of the extension column (3) and is connected to the conductive column (5). The misalignment assembly is disposed between the inner walls of the support column (1) and is connected to the conductive column (5). The linkage assembly is disposed between the inner walls of the support column (1) and is connected to the misalignment assembly. The guide assembly is disposed between the inner walls of the extension column (3) and is connected to the elastic assembly. The elastic component includes a limiting ring (4), an energized collar (6), and a spring (11). The limiting ring (4) is sleeved on the circumferential surface of the conductive post (5) and is fixedly connected to the inner wall of the extension post (3). The energized collar (6) is fixedly connected to the circumferential surface of the conductive post (5). The spring (11) is disposed between the conductive post (5) and the energized collar (6). One end of the spring (11) is connected to the energized collar (6), and the other end of the spring (11) is connected to the limiting ring (4).

2. The intelligent circuit breaker contact arm according to claim 1, characterized in that, The guide assembly includes a limiting rod (8) and a limiting groove (9). There are two limiting grooves (9), which are opened between the inner walls of the extension column (3). There are two limiting rods (8), which are fixedly connected to the circumferential surface of the energized collar (6). The two limiting rods (8) slide between the inner walls of the two limiting grooves (9).

3. The intelligent circuit breaker contact arm according to claim 2, characterized in that, The misalignment assembly includes a fixed toothed ring (12), a positioning post (13), a fixed disc (10), a limiting sleeve (19), and a movable toothed ring (14). The positioning post (13) is fixedly connected to the inner wall of the support post (1). The fixed toothed ring (12) and the movable toothed ring (14) are both sleeved on the circumferential surface of the positioning post (13). The movable toothed ring (14) is rotatably connected to the inner wall of the support post (1). The fixed toothed ring (12) meshes with the movable toothed ring (14). The fixed disc (10) is fixedly connected to the other end of the conductive post (5). The fixed disc (10) is fixedly connected to the fixed toothed ring (12). The limiting sleeve (19) is sleeved on the surface of the fixed toothed ring (12) and the movable toothed ring (14). The limiting sleeve (19) is fixedly connected between the inner walls of the support post (1).

4. The intelligent circuit breaker contact arm according to claim 3, characterized in that, The linkage assembly includes a driven pull rod (15), an active pull rod (16), and an electric push rod (17). The driven pull rod (15) is fixedly connected to the circumferential surface of the movable toothed ring (14). The electric push rod (17) is fixedly connected to the inner wall of the support column (1). The active pull rod (16) is disposed between the inner walls of the support column (1). One end of the active pull rod (16) is rotatably connected to the driven pull rod (15), and the other end of the active pull rod (16) is rotatably connected to the output end of the electric push rod (17).

5. The intelligent circuit breaker contact arm according to claim 4, characterized in that, A conductive carbon brush (18) is elastically fixed on the inner wall of the extension column (3), and the conductive carbon brush (18) is attached to the energized collar (6).

6. The intelligent circuit breaker contact arm according to claim 5, characterized in that, The top of the extension column (3) is fixedly connected to a running indicator light (20), and the bottom of the extension column (3) is equipped with a magnetic sensor (21). The magnetic sensor (21) corresponds to the contact (7), and the side end of the support column (1) is fixedly installed with a running terminal (22).

7. The intelligent circuit breaker contact arm according to claim 6, characterized in that, The bottom of the support column (1) is fixedly connected to the mounting plate (2).

8. The intelligent circuit breaker contact arm according to claim 6, characterized in that, The support column (1), mounting plate (2), extension column (3) and fixing plate (10) are all made of insulating ceramic.

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