Circuit breaker with high safety

Abstract

The utility model relates to the field of electric power, and discloses a high-safety circuit breaker, which comprises a circuit breaker shell, an arc extinguish chamber is fixedly arranged at the inner bottom end of the circuit breaker shell, the arc extinguish chamber comprises two arc extinguish chambers, a first arc extinguish plate is fixedly arranged on one side of one opposite end of each arc extinguish chamber, and a second arc extinguish plate is fixedly arranged on one side of the other opposite end of each arc extinguish chamber. A second arc extinguishing plate is fixedly arranged at the position, close to the first arc extinguishing plate, of the opposite ends of the two arc extinguishing covers, an electromagnetic component is fixedly arranged at the bottom end in the circuit breaker shell, the electromagnetic component comprises a trigger rod shell, the outer end of the trigger rod shell is sleeved with a coil, a hydraulic rod is fixedly arranged at the top end in the trigger rod shell, and the hydraulic rod is fixedly connected with the electromagnetic component. A trigger rod body is fixedly arranged at the lower end of the hydraulic rod, and a trigger block is fixedly arranged at the lower end of the trigger rod body. In the utility model, the electromagnetic component adopts the hydraulic rod, and the speed can be controlled by controlling the flowing of liquid, so that the speed control of the spring is relatively limited.

Description

Technical Field

[0001] The utility model relates to the field of electric power, in particular to a circuit breaker with high safety. Background Technique

[0002] A circuit breaker is an electrical device used to control the flow of current in a circuit. Its main function is to disconnect the current in the circuit to protect electrical equipment and personnel from electrical faults such as overload and short circuit. The conventional structure includes: a circuit breaker housing, a trigger device, a handle, a thermal overload protection device, an incoming line chamber, and an outgoing line chamber.

[0003] However, the arc extinguishing grooves of the arc extinguishing device of the conventional circuit breaker have the same height and depth. If all the arc extinguishing grooves have the same height and depth, it may limit the arc extinguishing efficiency when dealing with different types or scales of arcs.

[0004] Therefore, the utility model provides a circuit breaker with high safety to solve the problems raised in the above background technique. Content of the Utility Model

[0005] The purpose of the utility model is to solve the deficiencies existing in the prior art, and a circuit breaker with high safety is proposed. The novel uses arc extinguishing grooves with different heights and depths to adapt to different types and scales of electrical equipment. Some equipment may require deeper arc extinguishing grooves to accommodate a larger amount of arc energy, while some may require shallower grooves.

[0006] To achieve the above object, the present utility model provides the following technical solution: A circuit breaker with high safety, including a circuit breaker housing. A handle is rotatably arranged on one side of the circuit breaker housing. A linkage spring is arranged at the inner bottom end of the handle. The other side of the linkage spring is movably provided with a three-axis main beam. The other end of the three-axis main beam is fixedly provided with a moving contact rod. An arc extinguishing electrode is fixedly arranged on the other side of the circuit breaker housing. A static contact piece is fixedly arranged at the lower end of the arc extinguishing electrode. A static contact is fixedly arranged at the upper end of the static contact piece. A lower wiring terminal is fixedly arranged at the lower end of the static contact piece. An arc extinguishing chamber is fixedly arranged at the inner bottom end of the circuit breaker housing near one side of the arc extinguishing electrode. A yoke iron is fixedly arranged at the inner bottom end of the circuit breaker housing near the other side of the arc extinguishing chamber. An electromagnetic tripping trigger point is fixedly arranged at the upper end of the yoke iron. A tripping device is rotatably arranged at the inner bottom end of the circuit breaker housing near one side of the three-axis main beam. An electromagnetic component is fixedly arranged at the inner bottom end of the circuit breaker housing near one side of the yoke iron. An upper wiring terminal is fixedly arranged at the upper end of the circuit breaker housing. The electromagnetic component includes a trigger rod housing. A coil is sleeved on the outer end of the trigger rod housing. A hydraulic rod is fixedly arranged at the inner top end of the trigger rod housing. A trigger rod body is fixedly arranged at the lower end of the hydraulic rod. A trigger block is fixedly arranged at the lower end of the trigger rod body. The arc extinguishing chamber includes two arc extinguishing covers. A first arc extinguishing plate is fixedly arranged at one side of the opposite ends of the two arc extinguishing covers. A second arc extinguishing plate is fixedly arranged at a position near the first arc extinguishing plate at the opposite ends of the two arc extinguishing covers;

[0007] Through the above technical solution, in a normal circuit, in the closed state, the current first enters the electromagnetic component from the static contact through the moving contact rod, then enters the bimetallic strip, and then exits from the lower wiring terminal. In the case of a short circuit, the current in the circuit will increase sharply, usually reaching ten to twelve times the normal current. This large current will cause the electromagnetic component to generate a strong magnetic field. When the magnetic field force is strong enough, it will act on the hydraulic rod, generating enough force to push the tripping device to act, thereby pulling the handle and quickly tripping the circuit breaker to cut off the circuit. As the current continues to flow, it will pass through the arc extinguishing chamber. The function of the arc extinguishing chamber is to quickly extinguish the generated arc when the circuit breaker breaks the circuit, preventing the arc from damaging the equipment and personnel. In the case of overload, although the current is not as large as in the short circuit, the long-term overload will cause the heat generated by the current to increase, causing the bimetallic strip inside the circuit breaker to deform. When the bimetallic strip deforms to a certain extent, it will push the tripping device to act, tripping the circuit breaker to cut off the power. The design of the hydraulic rod can provide a more stable and controllable action, and has higher bearing capacity and longer service life.

[0008] Further, a bimetallic strip is fixedly arranged at the inner bottom end of the circuit breaker housing near the electromagnetic component. A buckle is fixedly arranged on the other side of the outer end of the circuit breaker housing;

[0009] Through the above technical solution, during overload, the current is not as large as that during a short circuit. However, long-term overload will cause the heat generated by the current to increase, causing the bimetallic strip inside the circuit breaker to deform, pushing the release to act, tripping the circuit breaker, and thus protecting the safety of equipment and personnel. The buckle can make the present invention firmly stuck on the wall, preventing the circuit breaker housing from loosening or shaking, and ensuring the stability and reliability of the circuit breaker during use.

[0010] Further, the bimetallic strip is fixedly arranged at the lower end of the lower terminal, and the release is fixedly arranged at the lower end of the bimetallic strip;

[0011] Through the above technical solution, the position of the bimetallic strip can ensure that when the current reaches a certain level, it can accurately touch the release, thereby acting on the handle, disconnecting the circuit, and protecting the safety of the circuit and equipment.

[0012] Further, the electromagnetic component is fixedly arranged at the lower end of the release, and the trigger block penetrates through the moving contact rod and is fixedly arranged at the lower end of the moving contact rod;

[0013] Through the above technical solution, during a short circuit, the electromagnetic component generates a strong magnetic field. When the magnetic force is strong enough, it acts on the hydraulic rod, causing it to generate enough force to push the release to act, thereby pulling the handle and tripping the circuit breaker quickly to cut off the circuit. The trigger block is at the lower end of the moving contact rod. After the handle is toggled, when the moving contact rod descends, it can drive the trigger block to descend together, thus forming a closed circuit.

[0014] Further, the bimetallic strip is electrically connected to the electromagnetic component, and the electromagnetic component is electrically connected to the moving contact rod;

[0015] Through the above technical solution, the electrical connection between the bimetallic strip and the electromagnetic component and the electrical connection between the electromagnetic component and the moving contact rod can realize the normal operation of the circuit breaker, ensuring that it can be triggered in time when the circuit is overloaded or short-circuited, and protecting the safety of the circuit and equipment.

[0016] Further, a double buckle beam is rotatably arranged at a position on one side of the inner bottom end of the circuit breaker housing close to the handle, and the three-axis main beam is at the lower end of the double buckle beam;

[0017] Through the above technical solution, when the circuit breaker detects overload or short circuit in the circuit, the electromagnetic component will generate a magnetic field. Through the transmission of the three-axis main beam, the force is transmitted to the contact system, causing the contacts to close quickly, thereby achieving the purpose of disconnecting the circuit. When the circuit breaker operates, the double buckle beam will be affected by the release, causing the handle to close quickly, thereby disconnecting the connection of the contacts and realizing the function of disconnecting the circuit.

[0018] Further, the moving contact rod is above the static contact;

[0019] Through the above technical solution, it is ensured that when the circuit breaker operates, the moving contact rod can accurately align with the static contact, thus ensuring the closure of the circuit.

[0020] The utility model has the following beneficial effects:

[0021] 1. A circuit breaker with high safety proposed by the utility model. Different heights and depths of arc extinguishing grooves are adopted in the new model. The arc extinguishing grooves with different depths and heights can better control the energy release and heat dispersion of the arc, reducing the impact on the surrounding environment. This helps to reduce the fire risk around the equipment and protect the safety of personnel and equipment.

[0022] 2. A circuit breaker with high safety proposed by the utility model. The electromagnetic component of the new model adopts a hydraulic rod. The hydraulic rod can control the speed by controlling the flow of liquid, so that more precise operating speed and operation control can be achieved. In contrast, the speed control of the spring is relatively limited. Description of the Drawings

[0023] Figure 1 Isometric view of the utility model;

[0024] Figure 2 Top view of the utility model;

[0025] Figure 3 Isometric view of the electromagnetic component of the utility model;

[0026] Figure 4 Sectional view of the electromagnetic component of the utility model;

[0027] Figure 5 Isometric view of the arc extinguishing chamber of the utility model;

[0028] Figure 6 Top view of the first arc extinguishing plate and the second arc extinguishing plate of the utility model.

[0029] Legend:

[0030] 1. Handle; 2. Linkage spring; 3. Three-axis main beam; 4. Double-buckle beam; 5. Release; 6. Electromagnetic component; 601. Hydraulic rod; 602. Trigger rod body; 603. Coil; 604. Trigger rod housing; 605. Trigger block; 7. Electromagnetic release trigger point; 8. Moving contact rod; 9. Static contact; 10. Static contact piece; 11. Arc extinguishing electrode; 12. Arc extinguishing chamber; 1201. Arc extinguishing cover; 1202. Second arc extinguishing plate; 1203. First arc extinguishing plate; 13. Upper terminal; 14. Lower terminal; 15. Buckle; 16. Circuit breaker housing; 17. Bimetallic strip; 18. Yoke iron. Detailed implementation

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0032] Embodiment

[0033] Refer to Figure 1-6, An embodiment provided by the present utility model: A circuit breaker with high safety, including a circuit breaker housing 16. A handle 1 is rotatably arranged on one side of the circuit breaker housing 16. A linkage spring 2 is arranged at the inner bottom end of the handle 1. A three-axis main beam 3 is movably arranged on the other side of the linkage spring 2. A moving contact rod 8 is fixedly arranged at the other end of the three-axis main beam 3. An arc extinguishing electrode 11 is fixedly arranged on the other side of the circuit breaker housing 16. A static contact piece 10 is fixedly arranged at the lower end of the arc extinguishing electrode 11. A static contact 9 is fixedly arranged at the upper end of the static contact piece 10. A lower wiring terminal 14 is fixedly arranged at the lower end of the static contact piece 10. An arc extinguishing chamber 12 is fixedly arranged on the inner bottom end of the circuit breaker housing 16 near one side of the arc extinguishing electrode 11. An armature 18 is fixedly arranged on the inner bottom end of the circuit breaker housing 16 near the other side of the arc extinguishing chamber 12. An electromagnetic tripping trigger point 7 is fixedly arranged at the upper end of the armature 18. A release 5 is rotatably arranged on the inner bottom end of the circuit breaker housing 16 near one side of the three-axis main beam 3. An electromagnetic component 6 is fixedly arranged on the inner bottom end of the circuit breaker housing 16 near the armature 18. An upper wiring terminal 13 is fixedly arranged at the upper end of the circuit breaker housing 16. The electromagnetic component 6 includes a trigger rod housing 604. A coil 603 is sleeved on the outer end of the trigger rod housing 604. A hydraulic rod 601 is fixedly arranged at the inner top end of the trigger rod housing 604. A trigger rod body 602 is fixedly arranged at the lower end of the hydraulic rod 601. A trigger block 605 is fixedly arranged at the lower end of the trigger rod body 602. The arc extinguishing chamber 12 includes two arc extinguishing covers 1201. A first arc extinguishing plate 1203 is fixedly arranged on one side of the opposite ends of the two arc extinguishing covers 1201. A second arc extinguishing plate 1202 is fixedly arranged at a position near the first arc extinguishing plate 1203 of the opposite ends of the two arc extinguishing covers 1201. In a normal circuit, in the closed state, the current first enters the electromagnetic component 6 from the static contact 9 through the moving contact rod 8, then enters the bimetal 17, and then goes out from the lower wiring terminal 14. In the case of a short circuit, the current in the circuit will increase sharply, usually reaching ten to twelve times the normal current. This large current will cause the electromagnetic component 6 to generate a strong magnetic field. When the magnetic force is strong enough, it will act on the hydraulic rod 601, generating enough force to push the release 5 to act, thereby pulling the handle 1 and causing the circuit breaker to quickly trip and cut off the circuit. As the current continues to flow, it will pass through the arc extinguishing chamber 12. The function of the arc extinguishing chamber 12 is to quickly extinguish the generated arc when the circuit breaker breaks the circuit, preventing the arc from damaging the equipment and personnel. In the case of overload, although the current is not as large as that in a short circuit, long-term overload will cause the heat generated by the current to increase, causing the bimetal 17 inside the circuit breaker to deform. When the bimetal 17 deforms to a certain extent, it will push the release 5 to act, causing the circuit breaker to trip and cut off the power. The design of the hydraulic rod 601 can provide a more stable and controllable action, and has higher bearing capacity and longer service life.

[0034] The hydraulic rod 601 can control the speed by controlling the flow of liquid, thereby enabling more precise movement speed and movement control. Conventional circuit breakers using springs have relatively limited speed control.

[0035] A bimetallic strip 17 is fixedly arranged at the inner bottom end of the circuit breaker housing 16 near the electromagnetic component 6, and a buckle 15 is fixedly arranged on the other side of the outer end of the circuit breaker housing 16. During overload, the current is not as large as in the case of a short circuit, but long-term overload will cause the heat generated by the current to increase, causing the bimetallic strip 17 inside the circuit breaker to deform, pushing the release 5 to act, tripping the circuit breaker, and thus protecting the safety of equipment and personnel. The buckle 15 enables the present novelty to be firmly clamped on the wall, preventing the circuit breaker housing 16 from loosening or shaking, and ensuring the stability and reliability of the circuit breaker during use. The bimetallic strip 17 is fixedly arranged at the lower end of the lower terminal 14, and the release 5 is fixedly arranged at the lower end of the bimetallic strip 17. The position of the bimetallic strip 17 can ensure that when the current reaches a certain level, it can accurately touch the release 5, thereby acting on the handle 1 and disconnecting the circuit to protect the safety of the circuit and equipment. The electromagnetic component 6 is fixedly arranged at the lower end of the release 5, and the trigger block 605 penetrates through the moving contact rod 8 and is fixedly arranged at the lower end of the moving contact rod 8. During a short circuit, the electromagnetic component 6 generates a strong magnetic field. When the magnetic force is strong enough, it acts on the hydraulic rod 601, causing it to generate sufficient force to push the release 5 to act, thereby pulling the handle 1 and quickly tripping the circuit breaker to cut off the circuit. The trigger block 605 is at the lower end of the moving contact rod 8. After the handle 1 is toggled, the moving contact rod 8 can drive the trigger block 605 to descend together when it descends, thus forming a closed circuit. The bimetallic strip 17 is electrically connected to the electromagnetic component 6, and the electromagnetic component 6 is electrically connected to the moving contact rod 8. The electrical connection between the bimetallic strip 17 and the electromagnetic component 6 and the electrical connection between the electromagnetic component 6 and the moving contact rod 8 can enable the normal operation of the circuit breaker, ensuring that it can trigger an action in a timely manner when the circuit is overloaded or short-circuited, and protecting the safety of the circuit and equipment. A double buckle beam 4 is rotatably arranged at one side of the inner bottom end of the circuit breaker housing 16 near the handle 1, and the three-axis main beam 3 is at the lower end of the double buckle beam 4. When the circuit breaker detects an overload or short circuit in the circuit, the electromagnetic component 6 will generate a magnetic field. Through the transmission action of the three-axis main beam 3, the force is transmitted to the contact system, causing the contacts to quickly close, thereby achieving the purpose of disconnecting the circuit. When the circuit breaker operates, the double buckle beam 4 will be affected by the release 5, causing the handle 1 to quickly close, thereby disconnecting the connection of the contacts and realizing the function of disconnecting the circuit. The moving contact rod 8 is above the static contact 9 to ensure that when the circuit breaker operates, the moving contact rod 8 can accurately align with the static contact 9, thus ensuring the closure of the circuit.

[0036] The arc extinguishing groove depths and heights of the first arc extinguishing plate 1203 and the second arc extinguishing plate 1202 of this new type are different, which can better control the energy release and heat dispersion of the electric arc, reduce the impact on the surrounding environment, help prevent the fire risk around the equipment, and protect the safety of personnel and equipment.

[0037] Working principle: In a normal circuit, in the closed state, the current first enters from the static contact 9, through the moving contact rod 8 into the electromagnetic component 6, then into the bimetallic strip 17, and then exits from the lower terminal 14. In the case of a short circuit, the current in the circuit will increase sharply, usually reaching ten to twelve times the normal current. This large current will cause the electromagnetic component 6 to generate a strong magnetic field. When the magnetic force is strong enough, it will act on the hydraulic rod 601, generating enough force to push the release 5 to act, thereby pulling the handle 1 and quickly tripping the circuit breaker to cut off the circuit. As the current continues to flow, it will pass through the arc extinguishing chamber 12. The function of the arc extinguishing chamber 12 is to quickly extinguish the generated electric arc when the circuit breaker breaks the circuit, preventing the electric arc from damaging the equipment and personnel. In the case of overload, although the current is not as large as in the case of a short circuit, long-term overload will cause the heat generated by the current to increase, causing the bimetallic strip 17 inside the circuit breaker to deform. When the bimetallic strip 17 deforms to a certain extent, it will push the release 5 to act, tripping the circuit breaker to cut off the power.

[0038] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A circuit breaker with high safety, comprising a circuit breaker housing (16), characterized in that: A handle (1) is rotatably provided on one side of the circuit breaker housing (16); a linkage spring (2) is provided at the inner bottom end of the handle (1); a three-axis main beam (3) is movably provided on the other side of the linkage spring (2); a moving contact rod (8) is fixedly provided at the other end of the three-axis main beam (3); an arc extinguishing electrode (11) is fixedly provided on the other side of the circuit breaker housing (16); a static contact sheet (10) is fixedly provided at the lower end of the arc extinguishing electrode (11); a static contact (9) is fixedly provided at the upper end of the static contact sheet (10); a lower terminal (14) is fixedly provided at the lower end of the static contact sheet (10); An arc extinguishing chamber (12) is fixedly arranged on one side of the inner bottom end of the circuit breaker housing (16) close to the arc extinguishing electrode (11), a yoke (18) is fixedly arranged on the other side of the inner bottom end of the circuit breaker housing (16) close to the arc extinguishing chamber (12), an electromagnetic tripping trigger (7) is fixedly arranged on the upper end of the yoke (18), a release (5) is rotatably arranged on one side of the inner bottom end of the circuit breaker housing (16) close to the three-axis main beam (3), an electromagnetic component (6) is fixedly arranged on one side of the inner bottom end of the circuit breaker housing (16) close to the yoke (18), and an upper wiring terminal (13) is fixedly arranged on the upper end of the circuit breaker housing (16); The electromagnetic component (6) comprises a trigger rod housing (604), the outer end of the trigger rod housing (604) is sleeved with a coil (603), a hydraulic rod (601) is fixedly arranged at the top end of the trigger rod housing (604), a trigger rod body (602) is fixedly arranged at the lower end of the hydraulic rod (601), and a trigger block (605) is fixedly arranged at the lower end of the trigger rod body (602); The arc extinguishing chamber (12) comprises two arc extinguishing covers (1201), a first arc extinguishing plate (1203) being fixedly arranged on one side of opposite ends of the two arc extinguishing covers (1201), and a second arc extinguishing plate (1202) being fixedly arranged at a position close to the first arc extinguishing plate (1203) at opposite ends of the two arc extinguishing covers (1201).

2. A circuit breaker with high safety according to claim 1, characterized in that: A bimetallic strip (17) is fixedly provided at a position close to the electromagnetic component (6) at the inner bottom end of the circuit breaker housing (16), and a buckle (15) is fixedly provided at the other side of the outer end of the circuit breaker housing (16).

3. A circuit breaker with high safety according to claim 2, characterized in that: The bimetallic strip (17) is fixedly arranged at the lower end of the lower wiring terminal (14), and the releaser (5) is fixedly arranged at the lower end of the bimetallic strip (17).

4. A circuit breaker with high safety according to claim 1, characterized in that: The electromagnetic component (6) is fixedly arranged at the lower end of the release (5), and the trigger block (605) passes through the moving contact rod (8) and is connected to the lower end of the moving contact rod (8) and is fixedly arranged.

5. A circuit breaker with high safety according to claim 2, characterized in that: The bimetallic strip (17) is electrically connected to the electromagnetic component (6), and the electromagnetic component (6) is electrically connected to the moving contact rod (8).

6. A circuit breaker with high safety according to claim 1, characterized in that: A double buckle beam (4) is rotatably provided at a position close to the handle (1) on one side of the inner bottom end of the circuit breaker housing (16), and the three-axis main beam (3) is at the lower end of the double buckle beam (4).

7. A circuit breaker with high safety according to claim 1, characterized in that: The moving contact rod (8) is at the upper end of the stationary contact (9).

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