A small electric leakage protection circuit breaker

Abstract

The utility model discloses a small -size electric leakage protection circuit breaker, including shell and apron, the surface of shell is established with the clamping hole, the outer surface of apron is fixedly connected with the clamping plate, the clamping plate and the clamping hole of shell surface establishment are adapted, the inner wall department of shell is provided with wiring mechanism, the quantity of this wiring mechanism is two, and two wiring mechanism respectively set up in the both sides of shell inner wall, the middle part of shell inner wall is provided with the circuit breaking mechanism, the circuit breaking mechanism includes first limit rod, first limit rod fixedly connected in the middle part of shell inner wall, the outer surface sliding connection of first limit rod has the metal pipe, the outer surface of metal pipe is equipped with helical coil, through setting wiring mechanism, can together with circuit with small -size electric leakage protection circuit breaker is connected. The utility model discloses small -size electric leakage protection circuit breaker has the effect that the circuit is rapidly broken in the state of abnormality.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a miniature residual current circuit breaker. Background Technology

[0002] A residual current circuit breaker (RCCB) is a critical protective device used in low-voltage power distribution systems to prevent electric shock and electrical fires. Its core function is to detect residual current (leakage current) in the circuit. When the leakage current exceeds a set threshold (typically 30mA or 100mA), it can quickly disconnect the faulty circuit within 0.1 seconds. This device monitors the vector sum of the phase and neutral currents in real time using a zero-sequence current transformer. When the difference reaches the operating value, the tripping mechanism triggers the circuit breaker to ensure the safety of personnel and equipment.

[0003] If a residual current circuit breaker (RCCB) fails to trip quickly, it can lead to serious electrical safety hazards. When a leakage current fault occurs in a line or equipment, if the protective device operates with a delay or fails, the fault current will persist, potentially causing electric shock to personnel handling live equipment or even leading to fatal accidents. If the leakage current is not cut off in time, the fault point may generate continuous heat, potentially causing an electrical fire, especially in humid or flammable environments. Furthermore, prolonged leakage can further deteriorate the insulation performance of the line, expanding the fault area and affecting the stability of the entire power distribution system. Utility Model Content

[0004] This utility model discloses a small residual current circuit breaker, which aims to solve the technical problem of not being able to quickly disconnect the circuit.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A miniature residual current circuit breaker includes a housing and a cover. The housing has locking holes on its surface, and a locking plate is fixedly connected to the outer surface of the cover. The locking plate is adapted to the locking holes on the housing surface. Two wiring mechanisms are provided on the inner wall of the housing, respectively located on opposite sides of the inner wall. A circuit breaker mechanism is located in the middle of the inner wall, including a first limiting rod fixedly connected to the middle of the inner wall. A metal tube is slidably connected to the outer surface of the first limiting rod, and a spiral coil is sleeved on the outer surface of the metal tube. By providing the wiring mechanisms, the miniature residual current circuit breaker can be connected to a circuit, preventing loosening during connection and protecting the circuit. The circuit breaker mechanism also prevents electric shock and electrical fires, while providing overload and short-circuit protection. Its core principle is to detect the leakage current in the circuit. When the leakage current exceeds the set value, it can automatically cut off the power supply in a very short time. By setting the first limit rod, the metal tube can be limited, so that the metal tube can move laterally on its outer surface. By setting the spiral coil, the inner metal tube can move when an overload current is generated.

[0006] In a preferred embodiment, the outer shell surface has a plurality of locking holes, which are respectively located at the corners of the outer shell surface. The outer shell surface also has a plurality of locking plates, which are respectively located at the corners of the outer surface of the cover plate, and are aligned with the locking holes. The wiring mechanism includes a wiring frame fixedly connected to the inner wall of the outer shell. A positioning screw is threaded onto the upper surface of the wiring frame. A conductive frame is located at the bottom of the inner wall of the wiring frame. A first wire is located on the upper surface of the conductive frame, passing through the wiring frame. The end of the first wire is fixedly connected to the end of a spiral coil. The wiring mechanism also includes a connection port, which passes through the outer surface of the outer shell. A circular hole is located on the side of the wiring frame near the connection port, and the connection port is aligned with the circular hole on the outer surface of the wiring frame. A wrapping plate is fixedly connected to the outer surface of the connection port. A soft pad is fixedly connected to the inner surface of the wrapping plate, and a threaded ring is threaded onto the outer surface of the wrapping plate.

[0007] By setting a locking plate and locking holes, the cover plate can be easily connected to the outer shell to form a closed space. By setting a wiring frame and positioning screws, after the wire is inserted into the wiring frame and the positioning screws are rotated, the positioning screws will compress the wire in the inner cavity of the wiring frame, thereby completing the positioning of the wire. By setting a first conductor, the current of the conductive frame can be conducted. By setting a connection port and a round hole, the wire can be guided so that the wire can be inserted into the inner cavity of the wiring frame. By setting a wrapping plate and a soft pad, it can cooperate with the wire to position and wrap the wire. By setting a threaded ring, after the outer surface of the wrapping plate is rotated, the threaded ring and the soft pad can wrap the wire.

[0008] In a preferred embodiment, the circuit breaker further includes a rapid arc extinguishing system, which is fixedly connected to the bottom surface of the inner cavity of the housing. A second conductor is fixedly connected to the upper surface of the rapid arc extinguishing system. The end of the second conductor away from the rapid arc extinguishing system is fixedly connected to the end of the spiral coil. A third conductor is fixedly connected to the output end of the rapid arc extinguishing system away from the second conductor. The third conductor is fixedly connected to a wiring mechanism located at the output end. A fourth conductor is connected to the outer surface of the third conductor. A connector is fixedly connected to the top end of the fourth conductor. The connector is pressed and fitted against the outer surface of the second conductor. A track frame extends through the upper surface of the housing. A handle is slidably connected to the inner cavity of the track frame. A sliding ring is fixedly connected to the bottom end of the handle. A second limiting rod is provided on the inner ring of the sliding ring. The second limiting rod is fixedly connected to the inner wall of the housing. The connector is fixedly connected to the lower surface of the sliding ring. A support rod is fixedly connected to the outer surface of the sliding ring. A pressing plate is fixedly connected to the end of the support rod. The pressing plate is pressed and fitted against the end of the metal tube.

[0009] By setting up a rapid arc extinguishing system, when a circuit fault occurs, an arc fault may lead to switch cabinet explosion, equipment meltdown, or even fire. Through active arc extinguishing technology, the arc is extinguished immediately when it occurs, preventing the accident from escalating. By setting up a connector, current cannot pass through the rapid arc extinguishing system when the connector contacts the outer surface of the second conductor. By setting up a track frame, the handle can be limited to move within the inner cavity of the track frame. By setting up a second limit rod, the sliding ring can be limited to move laterally on its outer surface. By setting up a squeezing plate, the squeezing plate and the sliding ring can be squeezed when the metal tube moves.

[0010] As can be seen from the above, a small residual current circuit breaker has the following improvements and advantages compared with the existing technology; Firstly, by setting up a wiring mechanism, a small residual current circuit breaker can be connected to the circuit, and the connection can be made less prone to loosening, thus protecting the circuit.

[0011] Secondly, by setting a circuit breaker mechanism, it is used to prevent electric shock and electrical fires, and also has overload and short circuit protection functions. Its core principle is to detect the leakage current in the circuit. When the leakage current exceeds the set value, it can automatically cut off the power supply in a very short time. By setting a first limit rod, the metal tube can be limited, so that the metal tube can move stably laterally on its outer surface. By setting a spiral coil, the inner metal tube can move when an overload current is generated. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a small residual current circuit breaker proposed in this utility model.

[0013] Figure 2 This is a schematic diagram showing the structure of a small residual current circuit breaker proposed in this utility model.

[0014] Figure 3 This is a schematic diagram of the internal structure of a small residual current circuit breaker proposed in this utility model.

[0015] Figure 4 This is a schematic diagram of the wiring mechanism of a small residual current circuit breaker proposed in this utility model.

[0016] Figure 5 This is a schematic diagram of the circuit breaking mechanism of a small residual current circuit breaker proposed in this utility model.

[0017] Figure 6 This is a partial schematic diagram of the circuit breaking mechanism of a small residual current circuit breaker proposed in this utility model.

[0018] In the attached diagram: 1. Outer shell; 2. Locking hole; 3. Cover plate; 4. Locking plate; 5. Wiring mechanism; 6. Circuit breaking mechanism; 51. Wiring frame; 52. Positioning screw; 53. Conductive frame; 54. First conductor; 55. Connection port; 56. Wrapping plate; 57. Soft pad; 58. Threaded ring; 61. Rapid arc extinguishing system; 62. Second conductor; 63. Helical coil; 64. First limiting rod; 65. Metal tube; 66. Third conductor; 67. Fourth conductor; 68. Connector; 69. Track frame; 610. Handle; 611. Sliding ring; 612. Second limiting rod; 613. Support rod; 614. Extrusion plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] The small residual current circuit breaker disclosed in this utility model is mainly used in scenarios where the circuit cannot be quickly disconnected when there is an abnormality.

[0022] Reference Figures 1-6 A miniature residual current circuit breaker includes a housing 1 and a cover plate 3. The surface of the housing 1 has a locking hole 2. A locking plate 4 is fixedly connected to the outer surface of the cover plate 3, and the locking plate 4 is adapted to the locking hole 2 on the surface of the housing 1. Two wiring mechanisms 5 are provided on the inner wall of the housing 1, respectively located on opposite sides of the inner wall. A circuit breaker mechanism 6 is provided in the middle of the inner wall of the housing 1. The circuit breaker mechanism 6 includes a first limiting rod 64, which is fixedly connected to the middle of the inner wall of the housing 1. A metal tube 65 is slidably connected to the outer surface of the first limiting rod 64, and a spiral coil 63 is sleeved on the outer surface of the metal tube 65. By providing the wiring mechanism 5, the miniature residual current circuit breaker can be connected to the circuit, preventing loosening during connection and protecting the circuit. The circuit breaker mechanism 6 is used to prevent electric shock and electrical fires, and also provides overload and short-circuit protection. Its core principle is to detect the leakage current in the circuit, that is, the current imbalance between the phase line and the neutral line. When the leakage current exceeds the set value, such as 10mA-30mA for electric shock prevention and above 300mA for fire prevention, it can automatically cut off the power supply in a very short time, usually within 0.1 seconds. By setting the first limit rod 64, the metal tube 65 can be limited, so that the metal tube 65 can move laterally on its outer surface. By setting the spiral coil 63, the inner metal tube 65 can move when an overload current is generated.

[0023] The outer shell 1 has a number of locking holes 2, which are respectively located at the corners of the outer shell 1. The outer shell 1 has a number of locking plates 4, which are respectively located at the corners of the outer surface of the cover plate 3. The locking plates 4 are aligned with the locking holes 2. By setting the locking plates 4 and the locking holes 2, the cover plate 3 and the outer shell 1 can be easily connected together to form a closed space.

[0024] The wiring mechanism 5 includes a wiring frame 51, which is fixedly connected to the inner wall of the outer casing 1. A positioning screw 52 is threaded onto the upper surface of the wiring frame 51. A conductive frame 53 is provided at the bottom of the inner wall of the wiring frame 51. A first wire 54 is provided on the upper surface of the conductive frame 53, passing through the wiring frame 51. The end of the first wire 54 is fixedly connected to the end of the spiral coil 63. By setting the wiring frame 51 and the positioning screw 52, ​​after the wire is inserted into the wiring frame 51 and the positioning screw 52 is rotated, the positioning screw 52 presses the wire inside the wiring frame 51, thereby completing the positioning of the wire. The first wire 54 can also conduct current through the conductive frame 53. The wiring mechanism 5 also... The device includes a connection port 55 that penetrates the outer surface of the housing 1. A circular hole is provided on the side of the wiring frame 51 near the connection port 55. The connection port 55 is aligned with the circular hole on the outer surface of the wiring frame 51. By providing the connection port 55 and the circular hole, the wire can be guided so that it can be inserted into the inner cavity of the wiring frame 51. A wrapping plate 56 is fixedly connected to the outer surface of the connection port 55. A soft pad 57 is fixedly connected to the inner surface of the wrapping plate 56. A threaded ring 58 is threadedly connected to the outer surface of the wrapping plate 56. By providing the wrapping plate 56 and the soft pad 57, they can cooperate with the wire to position and wrap the wire. By providing the threaded ring 58, the threaded ring 58 and the soft pad 57 can wrap the wire after the outer surface of the wrapping plate 56 is rotated.

[0025] The circuit breaker mechanism 6 also includes a rapid arc extinguishing system 61, which is fixedly connected to the bottom surface of the inner cavity of the housing 1. A second conductor 62 is fixedly connected to the upper surface of the rapid arc extinguishing system 61. The end of the second conductor 62 away from the rapid arc extinguishing system 61 is fixedly connected to the end of the spiral coil 63. By setting up the rapid arc extinguishing system 61, when a circuit fault occurs, an arc fault may lead to the explosion of the switch cabinet, the melting of equipment, or even a fire. Through active arc extinguishing technology, the arc is extinguished immediately when it occurs, preventing the accident from escalating. A third conductor 66 is fixedly connected to the output end of the rapid arc extinguishing system 61 away from the second conductor 62. The third conductor 66 is fixedly connected to the wiring mechanism 5 located at the output end. A fourth conductor 67 is connected to the outer surface of the third conductor 66. A connector 68 is fixedly connected to the top end of the fourth conductor 67. The connector 68 is pressed and fitted to the outer surface of the second conductor 62. By setting up the connector 68, when the connector 68 contacts the outer surface of the second conductor 62, To prevent current from passing through the rapid arc-extinguishing system 61, a track frame 69 extends through the upper surface of the outer casing 1. A handle 610 is slidably connected to the inner cavity of the track frame 69. A sliding ring 611 is fixedly connected to the bottom end of the handle 610. A second limiting rod 612 is provided on the inner ring of the sliding ring 611 and is fixedly connected to the inner wall of the outer casing 1. The contact head 68 is fixedly connected to the lower surface of the sliding ring 611, and a support rod 613 is fixedly connected to the outer surface of the sliding ring 611. An extrusion plate 614 is fixedly connected to the end of the support rod 613. The extrusion plate 614 is extruded and adapted to the end of the metal tube 65. By setting the track frame 69, the handle 610 can be limited, allowing the handle 610 to move in the inner cavity of the track frame 69. By setting the second limiting rod 612, the sliding ring 611 can be limited, allowing the sliding ring 611 to move laterally on its outer surface. By setting the extrusion plate 614, the extrusion plate 614 and the sliding ring 611 can be extruded when the metal tube 65 moves.

[0026] Working principle: When in use, the operator connects the wire to the wiring mechanism 5. When a circuit fault occurs, the abnormal current will cause the spiral coil 63 to generate a magnetic field, which will cause the metal tube 65 to move laterally on the outer surface of the first limit rod 64. This will cause the end of the metal tube 65 to press against the extrusion plate 614, and finally cause the sliding ring 611 to drive the contact head 68 to move to the right. At this time, the current will pass through the rapid arc extinguishing system 61, thereby protecting the circuit.

[0027] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A small residual current circuit breaker, comprising a housing (1) and a cover plate (3), wherein the surface of the housing (1) is provided with a locking hole (2), and a locking plate (4) is fixedly connected to the outer surface of the cover plate (3), the locking plate (4) being adapted to the locking hole (2) provided on the surface of the housing (1), characterized in that, The inner wall of the outer shell (1) is provided with a wiring mechanism (5), and there are two wiring mechanisms (5), which are respectively located on both sides of the inner wall of the outer shell (1). The middle part of the inner wall of the outer shell (1) is provided with a circuit breaker mechanism (6), which includes a first limiting rod (64). The first limiting rod (64) is fixedly connected to the middle part of the inner wall of the outer shell (1). The outer surface of the first limiting rod (64) is slidably connected with a metal tube (65), and a spiral coil (63) is sleeved on the outer surface of the metal tube (65).

2. The miniature residual current circuit breaker according to claim 1, characterized in that, The number of locking holes (2) opened on the surface of the outer shell (1) is several, and the several locking holes (2) are respectively opened at the corners of the surface of the outer shell (1).

3. A miniature residual current circuit breaker according to claim 2, characterized in that, The number of the carding plates (4) is several, and the several carding plates (4) are respectively set at the corners of the outer surface of the cover plate (3), and the several carding plates (4) are aligned with the several carding holes (2).

4. A miniature residual current circuit breaker according to claim 1, characterized in that, The wiring mechanism (5) includes a wiring frame (51), which is fixedly connected to the inner wall of the outer shell (1). A positioning screw (52) is threadedly connected to the upper surface of the wiring frame (51). A conductive frame (53) is provided at the bottom of the inner wall of the wiring frame (51). A first wire (54) is provided on the upper surface of the conductive frame (53). The first wire (54) passes through the wiring frame (51), and the end of the first wire (54) is fixedly connected to the end of the spiral coil (63).

5. A miniature residual current circuit breaker according to claim 4, characterized in that, The wiring mechanism (5) also includes a connection port (55), which penetrates the outer surface of the housing (1). A circular hole is provided on the side of the wiring frame (51) near the connection port (55), and the connection port (55) is aligned with the circular hole on the outer surface of the wiring frame (51).

6. A miniature residual current circuit breaker according to claim 5, characterized in that, A wrapping plate (56) is fixedly connected to the outer surface of the connection port (55), a soft pad (57) is fixedly connected to the inner surface of the wrapping plate (56), and a threaded ring (58) is threadedly connected to the outer surface of the wrapping plate (56).

7. A miniature residual current circuit breaker according to claim 6, characterized in that, The circuit breaking mechanism (6) also includes a rapid arc extinguishing system (61), which is fixedly connected to the bottom surface of the inner cavity of the outer shell (1). A second conductor (62) is fixedly connected to the upper surface of the rapid arc extinguishing system (61), and one end of the second conductor (62) away from the rapid arc extinguishing system (61) is fixedly connected to the end of the spiral coil (63).

8. A miniature residual current circuit breaker according to claim 7, characterized in that, The rapid arc extinguishing system (61) has a third wire (66) fixedly connected to its output end away from the second wire (62), and the third wire (66) is fixedly connected to the wiring mechanism (5) located at the output end.

9. A miniature residual current circuit breaker according to claim 8, characterized in that, The outer surface of the third conductor (66) is connected to the fourth conductor (67), and the top end of the fourth conductor (67) is fixedly connected to a connector (68), which is pressed and adapted to the outer surface of the second conductor (62).

10. A miniature residual current circuit breaker according to claim 9, characterized in that, The upper surface of the outer shell (1) is perforated by a track frame (69). A handle (610) is slidably connected to the inner cavity of the track frame (69). A sliding ring (611) is fixedly connected to the bottom end of the handle (610). A second limiting rod (612) is provided at the inner ring of the sliding ring (611). The second limiting rod (612) is fixedly connected to the inner wall of the outer shell (1). The electrical connector (68) is fixedly connected to the lower surface of the sliding ring (611). A support rod (613) is fixedly connected to the outer surface of the sliding ring (611). An extrusion plate (614) is fixedly connected to the end of the support rod (613). The extrusion plate (614) is extruded and adapted to the end of the metal tube (65).

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