Circuit breaker automatic reset operation mechanism
By using the combination of connecting rods, reset rods, reset springs, locks and solenoids in the circuit breaker operating mechanism, fast response and accurate action are achieved, and the traditional circuit breaker operating mechanism is solved. The slow response speed and locking of fault tripping in traditional circuit breaker operating mechanisms are solved. The problem of insufficient tripping action improves the safety of the circuit and the service life of the equipment.
Patent Information
- Application Number
- CN202422786421.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-11-15
AI Technical Summary
The traditional circuit breaker operating mechanism responds slowly to fault trips, which may cause damage to electrical equipment or cause fires, and the locking and tripping actions are not reliable enough, which affects the effective performance of circuit safety and protection functions.
An automatic reset operation mechanism for circuit breakers is designed, using the coordination of connecting rods, reset rods, reset springs, locks, solenoids and armatures to achieve rapid tripping and accurate reset, through cam, spindle, push rod, slider The coordinated work of other components ensures the accuracy and stability of mechanical transmission, and provides protection and limiting functions through baffles.
It realizes rapid tripping in case of circuit failure, avoids equipment damage and fire accidents, improves circuit safety, ensures accurate operation of circuit breakers in normal and faulty situations, extends equipment service life and reduces maintenance costs.
Smart Images
Figure CN222233552U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of circuit breakers, in particular to an automatic resetting operating mechanism for circuit breakers. Background Art
[0002] Traditional circuit breaker operating mechanisms often require manual reset operations after tripping due to a fault, which not only increases the workload of operators, but also causes untimely or inaccurate resets due to human factors, affecting the normal operation of the circuit. In addition, the locking and tripping mechanisms of some operating mechanisms are not reliable enough, which can easily lead to malfunctions or failure to trip in time when a fault occurs, thereby reducing the safety of the circuit.
[0003] The operating mechanism proposed in Chinese utility model patent application number: CN202022570554.9 includes a casing, a closing transmission mechanism and an opening transmission mechanism; the closing transmission mechanism includes a closing half-shaft and a closing lever; the opening transmission mechanism includes an opening half-shaft and an opening lever, which reduces the parts of the closing transmission mechanism and the opening transmission mechanism and reduces the cost.
[0004] However, the existing operating mechanism has some shortcomings during use and still needs to be improved. The tripping response speed of the traditional circuit breaker operating mechanism may be slow, and it cannot trip quickly at the moment of circuit fault, which may cause damage to electrical equipment and even cause safety accidents such as fire, affecting the safety of the circuit.
[0005] In terms of the implementation of locking and tripping actions, there may be problems with the reliability of traditional operating mechanisms. The coordination between components is not precise enough, which can easily lead to inaccurate operation of the circuit breaker under normal operation and fault conditions, affecting the effective performance of its protection function.
[0006] For the mechanical transmission part, the coordinated electronic control elements of the components in the traditional operating mechanism cannot achieve precise mechanical transmission, thus affecting the accuracy and stability of the circuit breaker's operation.
[0007] In addition, the structural design and component coordination of the traditional operating mechanism may not be reasonable, which may easily lead to greater wear and impact between components, shorten the service life of the operating mechanism, and increase the maintenance cost of the equipment. Therefore, we make improvements to this and propose an automatic reset operating mechanism for circuit breaker. Utility Model Content
[0008] The purpose of the utility model is to address the problems raised by the existing background technology. In order to achieve the above-mentioned purpose of the utility model, the utility model provides the following technical solutions: an automatic reset operating mechanism for a circuit breaker, comprising an operating mechanism main frame, a connecting rod is arranged on the operating mechanism main frame, the connecting rod is connected to a reset rod, the reset rod is connected to a reset spring, the reset spring cooperates with a lock, the lock is connected to a trip plate, an electromagnet is arranged on the operating mechanism main frame, the electromagnet is magnetically connected to an armature, and the armature cooperates with a trip half shaft.
[0009] As a preferred technical solution of the utility model, one end of the opening spring is connected to the main frame of the operating mechanism, and the other end is connected to the moving contact of the circuit breaker.
[0010] As a preferred technical solution of the utility model, the lock is matched with the reset rod and the lock spring.
[0011] As a preferred technical solution of the utility model, one end of the reset spring is connected to the main frame of the operating mechanism, and the other end is connected to the reset rod.
[0012] As a preferred technical solution of the utility model, a trip spring and an opening spring are arranged in the main frame of the operating mechanism, and the trip spring is linked to the opening spring.
[0013] As a preferred technical solution of the utility model, a cam is arranged inside the main frame of the operating mechanism, the cam is connected to the main shaft, the cam cooperates with the push rod, the main shaft is connected to the ratchet, and the ratchet cooperates with the pawl.
[0014] As a preferred technical solution of the utility model, one end of the push rod is in contact with the cam, and the other end of the push rod is connected to the slider.
[0015] As a preferred technical solution of the utility model, the sliding block is slidably mounted on a guide rail.
[0016] As a preferred technical solution of the utility model, the reset button is activatably connected to the reset rod.
[0017] As a preferred technical solution of the present utility model, a baffle is provided on the main frame of the operating mechanism.
[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: in the scheme of the utility model: the operating mechanism can quickly trip when a circuit fault occurs, realize circuit breaker protection, effectively avoid damage to electrical equipment and fire safety accidents, and improve the safety of the circuit.
[0019] Through the cooperation of the lock, reset rod, reset spring, and trip plate components, as well as the magnetic connection between the electromagnet and the armature, reliable locking and tripping actions are achieved, ensuring accurate operation of the circuit breaker in normal operation and fault conditions.
[0020] The coordinated work of the cam, main shaft, push rod, slider, ratchet and pawl components in the main frame of the operating mechanism realizes precise mechanical transmission and ensures the accuracy and stability of the circuit breaker's operation.
[0021] Reasonable structural design and component coordination reduce wear and impact between components, extend the service life of the operating mechanism, and reduce equipment maintenance costs.
[0022] The quick response and accurate action of the operating mechanism help maintain the stability of the circuit system and reduce system fluctuations and power outages caused by faults.
[0023] The setting of the reset button makes the reset operation easier and the operator can easily complete the reset of the circuit breaker.
[0024] The baffle on the main frame of the operating mechanism plays a protective and limiting role, protecting the internal components from external interference and damage, while ensuring that the components move within the specified range, thereby improving the reliability of the operating mechanism. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 A schematic diagram of the structure provided by the utility model;
[0026] Figure 2 A schematic diagram of the tripping half-shaft structure provided by the utility model;
[0027] Figure 3 A schematic diagram of the structure of the trip plate provided by the utility model;
[0028] Figure 4 A schematic diagram of the main shaft structure provided by the utility model;
[0029] Figure 5 A schematic diagram of the structure of the opening spring provided by the utility model;
[0030] Figure 6 This is a schematic diagram of the main frame structure of the operating mechanism provided by the utility model.
[0031] Indicated in the figure:
[0032] 1. Main frame of operating mechanism; 2. Connecting rod; 3. Reset rod; 4. Opening spring; 401. Moving contact; 5. Lock; 6. Tripping plate; 7. Electromagnet; 8. Reset spring; 9. Tripping spring; 10. Armature; 11. Cam; 12. Ratchet; 13. Pawl; 14. Slider; 15. Guide rail; 16. Main shaft; 17. Reset button; 18. Tripping half shaft; 19. Lock spring; 20. Push rod; 21. Baffle. DETAILED DESCRIPTION
[0033] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.
[0034] Therefore, the following detailed description of the embodiments of the utility model is not intended to limit the scope of the utility model for which protection is sought, but merely represents some embodiments of the utility model. Based on the embodiments of 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. It should be noted that the embodiments of the utility model and the features and technical solutions in the embodiments can be combined with each other without conflict. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0035] Example 1: Please refer to Figure 1-Figure 6 A circuit breaker automatic reset operating mechanism includes an operating mechanism main frame 1, a connecting rod 2 is arranged on the operating mechanism main frame 1, the connecting rod 2 is connected to the reset rod 3, the reset rod 3 is connected to the reset spring 8, the reset spring 8 and the lock 5 cooperate with each other, the lock 5 is connected to the trip plate 6, and an electromagnet 7 is arranged on the operating mechanism main frame 1, the electromagnet 7 is magnetically connected to the armature 10, and the armature 10 cooperates with the trip half shaft 18.
[0036] One end of the opening spring 4 is connected to the main frame 1 of the operating mechanism, and the other end is connected to the moving contact 401 of the circuit breaker. The lock 5 cooperates with the reset rod 3 and the lock spring 19.
[0037] One end of the reset spring 8 is connected to the operating mechanism main frame 1, and the other end is connected to the reset rod 3. A trip spring 9 and an opening spring 4 are arranged in the operating mechanism main frame 1, and the trip spring 9 is linked with the opening spring 4. A cam 11 is arranged inside the operating mechanism main frame 1, and the cam 11 is connected to the main shaft 16, and the cam 11 cooperates with the push rod 20, and the main shaft 16 is connected to the ratchet 12, and the ratchet 12 cooperates with the pawl 13.
[0038] One end of the push rod 20 contacts the cam 11, and the other end of the push rod 20 is connected to the slider 14. The slider 14 is slidably mounted on the guide rail 15. The reset button 17 is operatively connected to the reset rod 3. A baffle 21 is provided on the main frame 1 of the operating mechanism.
[0039] Working principle of automatic reset operating mechanism of circuit breaker:
[0040] When the circuit breaker is in the closed state, the opening spring 4 is in the energy storage state, the reset spring 8 is also in the normal state, the lock 5 and the reset rod 3 are locked by the lock spring 19, the armature 10 is magnetically connected to the electromagnet 7, and the tripping half shaft 18 and the armature 10 are in a stable state.
[0041] When a fault occurs and tripping is required, the electromagnet 7 is powered off and loses its magnetism, the armature 10 is separated from the electromagnet 7, and the tripping half shaft 18 is actuated under the action of the relevant structure, so that the lock 5 is connected to the tripping plate 6 and the reset rod 3 is unlocked. At this time, the tripping spring 9 releases energy, driving the opening spring 4 to act, so that the moving contact 401 of the circuit breaker is opened, and the circuit breaker protection is realized.
[0042] After the switch is opened, if a reset operation is required, the reset button 17 can be pressed. The reset button 17 is connected to the reset rod 3 to push the reset rod 3 to move. The movement of the reset rod 3 compresses the reset spring 8 and drives the lock catch 5 to move, so that the lock catch 5 cooperates with the lock catch spring 19 to reach the locked state again.
[0043] In the main frame 1 of the operating mechanism, the trip spring 9 is linked with the opening spring 4 to realize the corresponding opening and closing actions. The cam 11 arranged on the inside is connected to the main shaft 16, the main shaft 16 is connected to the ratchet 12, the ratchet 12 cooperates with the pawl 13, and when the cam 11 rotates, it will push the push rod 20 to move. One end of the push rod 20 contacts the cam 11, and the other end is connected to the slider 14. The movement of the push rod 20 drives the slider 14 to slide on the guide rail 15, thereby realizing the relevant mechanical action. The baffle 21 arranged on the main frame 1 of the operating mechanism plays a certain protective and limiting role.
[0044] Embodiment 2: A circuit breaker automatic reset operating mechanism. When the circuit breaker is in the closed state, the opening spring 4 is compressed to a length of 60 mm, storing 200 J of energy, the reset spring 8 is at a natural length of 50 mm, the lock 5 and the reset rod 3 are locked by the lock spring 19, the lock spring 19 is compressed to a length of 25 mm, the armature 10 is magnetically connected to the electromagnet 7, and the tripping half shaft 18 cooperates with the armature 10 in a stable state.
[0045] When a fault occurs and tripping is required, the electromagnet 7 is powered off and loses its magnetism, the armature 10 is separated from the electromagnet 7, and the tripping half shaft 18 is actuated under the action of the relevant structure, so that the lock 5 is connected to the tripping plate 6 and the reset rod 3 is unlocked. At this time, the tripping spring 9 is stretched from the natural length of 60mm to 70mm, and the energy released is 80J, which drives the opening spring 4 to recover from the compressed length of 60mm to the natural length of 80mm, and the energy released is 200J. Together, the moving contact 401 of the circuit breaker is opened to achieve circuit breaker protection.
[0046] After the switch is opened, if a reset operation is required, the reset button 17 can be pressed. The reset button 17 is connected to the reset rod 3, pushing the reset rod 3 to move 10 mm. The movement of the reset rod 3 compresses the reset spring 8 to a length of 40 mm, and at the same time drives the lock buckle 5 to move, so that the lock buckle 5 cooperates with the lock buckle spring 19, and the lock buckle spring 19 is compressed to a length of 20 mm, and the locking state is reached again.
[0047] In the main frame 1 of the operating mechanism, the trip spring 9 is linked with the opening spring 4. The cam 11 arranged inside is connected with the main shaft 16, the main shaft 16 is connected with the ratchet 12, the ratchet 12 cooperates with the pawl 13, when the cam 11 rotates, it will push the push rod 20 to move. One end of the push rod 20 contacts the cam 11, and the other end is connected to the slider 14. The movement of the push rod 20 drives the slider 14 to slide on the guide rail 15. The baffle 21 arranged on the main frame 1 of the operating mechanism plays a certain role in protection and limiting.
[0048] Embodiment 3: A circuit breaker automatic reset operating mechanism. When the circuit breaker is in the closed state, the opening spring 4 is compressed to a length of 55 mm, storing 245 J of energy, the reset spring 8 is at a natural length of 45 mm, the lock 5 and the reset rod 3 are locked by the lock spring 19, the lock spring 19 is compressed to a length of 20 mm, the armature 10 is magnetically connected to the electromagnet 7, and the tripping half shaft 18 cooperates with the armature 10 in a stable state.
[0049] When a fault occurs and tripping is required, the electromagnet 7 is powered off and loses its magnetism, the armature 10 is separated from the electromagnet 7, and the tripping half shaft 18 is actuated under the action of the relevant structure, so that the lock 5 is connected to the tripping plate 6 and the reset rod 3 is unlocked. At this time, the tripping spring 9 is stretched from the natural length of 55mm to 65mm, and the energy released is 100J, which drives the opening spring 4 to recover from the compressed length of 55mm to the natural length of 70mm, and the energy released is 280J. Together, the moving contact 401 of the circuit breaker is opened to achieve circuit breaker protection.
[0050] After the switch is opened, if a reset operation is required, the reset button 17 can be pressed. The reset button 17 is connected to the reset rod 3, pushing the reset rod 3 to move 8 mm. The movement of the reset rod 3 compresses the reset spring 8 to a length of 37 mm, and at the same time drives the lock catch 5 to move, so that the lock catch 5 cooperates with the lock catch spring 19, and the lock catch spring 19 is compressed to a length of 18 mm, and the locking state is reached again.
[0051] In the main frame 1 of the operating mechanism, the trip spring 9 is linked to the opening spring 4. The cam 11 arranged on the inside is connected to the main shaft 16, the main shaft 16 is connected to the ratchet 12, the ratchet 12 cooperates with the pawl 13, when the cam 11 rotates, it will push the push rod 20 to move. One end of the push rod 20 contacts the cam 11, and the other end is connected to the slider 14. The movement of the push rod 20 drives the slider 14 to slide on the guide rail 15. The baffle 21 arranged on the main frame 1 of the operating mechanism plays a certain role in protection and limiting.
[0052] Specific working process of the circuit breaker automatic reset operating mechanism:
[0053] Circuit breaker closed state: the opening spring 4 is in the energy storage state, and the reset spring 8 is in the normal state. The lock 5 is locked with the reset rod 3 through the lock spring 19.
[0054] The electromagnet 7 is energized and magnetically connected to the armature 10, so that the armature 10 is kept in an adsorbed state, and the release half shaft 18 cooperates with the armature 10 and is in a stable state.
[0055] Fault tripping process: When a fault occurs in the circuit, the electromagnet 7 is de-energized and loses its magnetism, and the armature 10 is separated from the electromagnet 7. The tripping half-shaft 18 moves under the action of the relevant structure, pushing the lock 5 to connect with the tripping plate 6, and the lock 5 releases the lock on the reset rod 3. The tripping spring 9 releases energy and drives the opening spring 4 to move. One end of the opening spring 4 is connected to the main frame 1 of the operating mechanism, and the other end is connected to the moving contact 401 of the circuit breaker. The action of the opening spring 4 causes the moving contact 401 of the circuit breaker to open, thereby realizing circuit breaker protection.
[0056] Reset operation process: Press the reset button 17, the reset button 17 and the reset rod 3 are connected to each other, pushing the reset rod 3 to move. The movement of the reset rod 3 compresses the reset spring 8. The reset rod 3 drives the lock 5 to move, so that the lock 5 is locked with the reset rod 3 again under the action of the lock spring 19.
[0057] Subsequent mechanical transmission process: The trip spring 9 in the main frame 1 of the operating mechanism is linked with the opening spring 4 to prepare for the next tripping and opening action. The cam 11 inside the main frame 1 of the operating mechanism is connected to the main shaft 16. When the main shaft 16 rotates, the cam 11 is driven to rotate. The rotation of the cam 11 pushes the push rod 20. One end of the push rod 20 contacts the cam 11, and the other end is connected to the slider 14. The movement of the push rod 20 drives the slider 14 to slide on the guide rail 15. The main shaft 16 is connected to the ratchet 12, and the ratchet 12 cooperates with the pawl 13 to realize the relevant mechanical action.
[0058] Protection and Limitation: The baffle 21 provided on the main frame 1 of the operating mechanism plays a role of protection and limitation, ensuring that each component moves within a normal working range.
[0059] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or replacement of the present invention; and all technical solutions and improvements that do not depart from the spirit and scope of the present invention are included in the scope of the claims of the present invention.
Claims
1. A circuit breaker automatic reset operating mechanism, comprising an operating mechanism main frame (1), characterized in that: A connecting rod (2) is arranged on the main frame (1) of the operating mechanism, the connecting rod (2) is connected to the reset rod (3), the reset rod (3) is connected to the reset spring (8), the reset spring (8) and the lock buckle (5) cooperate with each other, the lock buckle (5) is connected to the release plate (6), and an electromagnet (7) is arranged on the main frame (1) of the operating mechanism, the electromagnet (7) is magnetically connected to the armature (10), and the armature (10) cooperates with the release half shaft (18).
2. The circuit breaker automatic reset operating mechanism according to claim 1, characterized in that: A switch-off spring (4) is provided on the operating mechanism main frame (1), and the other end of the switch-off spring (4) is connected to the moving contact (401) of the circuit breaker.
3. The circuit breaker automatic reset operating mechanism according to claim 1, characterized in that: It also includes a lock spring (19), and the lock (5) cooperates with the reset rod (3) and the lock spring (19).
4. The circuit breaker automatic reset operating mechanism according to claim 1, characterized in that: One end of the reset spring (8) is connected to the operating mechanism main frame (1), and the other end is connected to the reset rod (3).
5. The circuit breaker automatic reset operating mechanism according to claim 1, characterized in that: A trip spring (9) and an opening spring (4) are arranged in the operating mechanism main frame (1), and the trip spring (9) and the opening spring (4) are linked and connected.
6. The circuit breaker automatic reset operating mechanism according to claim 1, characterized in that: A cam (11) is arranged inside the main frame (1) of the operating mechanism, the cam (11) is connected to the main shaft (16), the cam (11) cooperates with the push rod (20), the main shaft (16) is connected to the ratchet (12), and the ratchet (12) cooperates with the pawl (13).
7. The circuit breaker automatic reset operating mechanism according to claim 6, characterized in that: One end of the push rod (20) is in contact with the cam (11), and the other end of the push rod (20) is connected to the slider (14).
8. The circuit breaker automatic reset operating mechanism according to claim 7, characterized in that: The slider (14) is slidably mounted on the guide rail (15).
9. The circuit breaker automatic reset operating mechanism according to claim 1, characterized in that: The reset rod (3) is connected to the reset button (17) by actuation.
10. The circuit breaker automatic reset operating mechanism according to claim 1, characterized in that: A baffle (21) is provided on the operating mechanism main frame (1).