Intelligent circuit breaker

Abstract

The utility model relates to the technical field of intelligent electrical equipment, in particular to an intelligent circuit breaker, which comprises a plurality of shells with the same structure, each shell is internally provided with a wire outlet terminal, a current transformer, a zero sequence transformer, an opening and closing conducting rod, an opening and closing wrench, a magnetic attraction structure, a wire inlet terminal and an arc extinguishing cover, the wire outlet terminal penetrates through the current transformer through a wire to be connected with the opening and closing conducting rod, the middle of the opening and closing conducting rod is clamped in the switch wrench, and the bottom of the opening and closing conducting rod is movably connected with the wire inlet terminal. According to the intelligent circuit breaker, manual control and automatic control are integrated, and opening and closing of the circuit breaker are achieved by pushing the switching wrench manually; the magnetic latching structure is automatically utilized to be linked with the switch wrench, so that the switch wrench realizes the opening and closing operation of the switch wrench according to different magnetic fields generated by the magnetic latching structure.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent electrical equipment, and in particular to an intelligent circuit breaker. Background Art

[0002] The rise of smart grids has put forward higher requirements for supporting power equipment technology. As an indispensable and important support in the construction of ubiquitous power systems, smart circuit breakers are developing closer to the level of intelligence to meet more needs. Smart circuit breakers integrate control and multiple protection functions. In addition to completing contact and disconnection of circuits, they can also protect against short circuits, severe overloads and undervoltages caused by circuits or electrical equipment.

[0003] At present, the intelligent circuit breakers on the market have complex structures, which are not convenient for people to operate during use and for subsequent inspection and maintenance. Utility Model Content

[0004] The utility model overcomes the shortcomings of the prior art and provides an intelligent circuit breaker.

[0005] The utility model is realized by the following technical scheme: an intelligent circuit breaker, comprising a plurality of housings with the same structure, characterized in that each housing is provided with an outlet terminal, a current transformer, a zero-sequence transformer, an opening and closing conductive rod, an opening and closing wrench, a magnetic attraction structure, an inlet terminal and an arc extinguishing cover,

[0006] The outlet terminal is connected to the opening and closing conductive rod through a wire passing through the current transformer. A zero-sequence transformer is arranged outside the current transformer. The middle part of the opening and closing conductive rod is stuck in the switch wrench. A torsion spring is also arranged between the opening and closing conductive rod and the switch wrench. The bottom of the opening and closing conductive rod is movably connected to the incoming terminal. An arc extinguishing cover is arranged at the connection between the incoming terminal and the opening and closing conductive rod.

[0007] A magnetic holding structure is provided at the rear end of the opening and closing wrench, and the magnetic holding structure includes two attraction parts, a permanent magnet, a magnetic holding bracket, two L-shaped frames and an iron core, wherein the two attraction parts are parallel to each other, and the permanent magnet is arranged between the two attraction parts, wherein a blocking plate is provided at the rear end of the rear attraction part, and the two ends of the blocking plate are connected to the switch wrench, and the magnetic holding bracket is arranged at the rear side of the blocking plate, and an iron core is provided inside the magnetic holding bracket, and a plurality of turns of coils are wound outside, and L-shaped frames are respectively provided at the upper and lower ends of the magnetic holding bracket, one end of the L-shaped frame is fixed on the magnetic holding bracket, and the other end is clamped between the two attraction parts.

[0008] Preferably, it further comprises a power module, a communication module and a control module, wherein the power module is connected to the communication module and the control module in sequence via a pin connector, wherein the power module adopts a capacitor with charging and discharging functions.

[0009] Preferably, the shell is provided with fixing holes, and all the shells are fixedly connected by rivets passing through the fixing holes in sequence.

[0010] Preferably, a pin hole is provided at the front end of each opening and closing wrench, and all the opening and closing wrenches are connected by rivets passing through the pin holes.

[0011] The beneficial effects of the utility model are:

[0012] 1. The intelligent circuit breaker of the utility model has the advantages of simple structure, strong load capacity, good breaking effect, long life, high action frequency and low failure rate.

[0013] 2. The intelligent circuit breaker of the utility model integrates manual and automatic control. The circuit breaker is opened and closed manually by pushing the switch wrench; the magnetic holding structure is automatically used to link the switch wrench, so that the switch wrench can realize the opening and closing operation according to the different magnetic fields generated by the magnetic holding structure.

[0014] 3. The intelligent circuit breaker of the utility model ensures the stability of the power supply of the equipment by setting a capacitor, that is, the charging and discharging function of the capacitor is used to ensure that the magnetic holding mechanism of the equipment can be disconnected when the external power supply is cut off. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a top view schematic diagram of the utility model;

[0017] Figure 3 yes Figure 2 The cross-section at A in the middle;

[0018] Figure 4 yes Figure 2 The cross-section at point B in the middle;

[0019] Figure 5 It is a side view schematic diagram of the utility model;

[0020] Figure 6 yes Figure 5 Sectional view at F in the middle;

[0021] Figure 7 It is a schematic diagram of the switch wrench structure of the utility model;

[0022] In the accompanying drawings, 1 is a shell, 2 is an outlet terminal, 3 is a current transformer, 4 is a zero-sequence transformer, 5 is a conductor, 6 is an opening and closing conductive rod, 7 is a torsion spring, 8 is an opening and closing wrench, 9 is a suction piece, 10 is a permanent magnet, 11 is a blocking plate, 12 is a magnetic holding bracket, 13 is an iron core, 14 is an L-shaped frame, 15 is an incoming terminal, 16 is an arc extinguishing cover, 17 is a capacitor, 18 is a pin connector, and 19 is a rivet. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and beneficial effects of the present invention more clearly understood, the technical solution of the present invention is further described below in conjunction with embodiments.

[0024] like Figures 1 to 7 As shown, an intelligent air switch includes several shells 1 with the same structure. For example, if they are arranged according to phase A, phase B, phase C and phase N, four shells are preferably used. Each shell 1 is respectively provided with an outlet terminal 2, a current transformer 3, a zero-sequence transformer 4, an opening and closing conductive rod 6, an opening and closing wrench 8, a magnetic attraction structure, an incoming terminal 15 and an arc extinguishing cover 16.

[0025] The outlet terminal 2 is connected to the opening and closing conductive rod 6 through the current transformer 3 through the wire 5. A zero-sequence transformer 4 is provided outside the current transformer 3. The current transformer 3 monitors whether the circuit is leaking, and the zero-sequence transformer 4 detects whether the circuit generates a zero-sequence grounding current, thereby realizing the protection of the circuit; the middle part of the opening and closing conductive rod 6 is stuck in the switch wrench, and a torsion spring 7 is also provided between the opening and closing conductive rod 6 and the switch wrench. The bottom of the opening and closing conductive rod 6 is movably connected to the incoming terminal 15. The function of the torsion spring 7 is to move the opening and closing conductive rod 6. The torsion spring 7 promotes the opening and closing conductive rod 6 to move over the stroke, thereby ensuring that the bottom of the opening and closing conductive rod 6 is tightly pressed on the incoming terminal 15. An arc extinguishing cover 16 is provided at the connection between the incoming terminal 15 and the opening and closing conductive rod 6, and the arc extinguishing method adopts magnetic blowing arc extinguishing.

[0026] A magnetic holding structure is provided at the rear end of the opening and closing wrench 8, and the magnetic holding structure includes two suction parts 9, a permanent magnet 10, a magnetic holding bracket 12, two L-shaped frames 14 and an iron core 13, wherein the two suction parts 9 are parallel to each other, and the permanent magnet 10 is arranged between the two suction parts 9, wherein a blocking plate 11 is provided at the rear end of the rear suction part 9, and both ends of the blocking plate 11 are connected to the switch wrench, that is, the blocking plate 11 fixes the suction part 9 on the opening and closing wrench 8, and the magnetic holding bracket 12 is arranged on the rear side of the blocking plate 11, and the magnetic holding bracket 12 is installed on the shell 1, and an iron core 13 is provided inside the magnetic holding bracket 12, and a plurality of turns of coils are wound outside, and L-shaped frames 14 are respectively provided at the upper and lower ends of the magnetic holding bracket 12, one end of the L-shaped frame 14 is fixed on the magnetic holding bracket 12, and the other end is stuck between the two suction parts 9. The coil is energized to generate a magnetic field, and the attraction or repulsion between the permanent magnet 10 and the magnetic field is used to realize the forward and backward swinging action of the suction member 9, and then the action of the opening and closing wrench 8 is driven by the action of the suction member 9 to realize the opening and closing of the entire circuit breaker.

[0027] The device also includes a power module, a communication module and a control module. The power module is connected to the communication module and the control module in sequence through a pin connector to supply power to them. In order to ensure power supply stability, a capacitor 17 with charging and discharging functions is provided on the power module.

[0028] In order to fix all the shells 1 in a row, fixing holes are provided on the shells 1, and all the shells 1 are fixedly connected by rivets 18 passing through the fixing holes in sequence; a pin hole is provided at the front end of each opening and closing wrench 8, and all the opening and closing wrenches 8 are connected by rivets 18 passing through the pin holes.

[0029] Manual opening and closing process: pull the opening and closing wrench 8 upward, the opening and closing conductive rod 6 is tightly connected with the incoming terminal 15 under the action of the opening and closing wrench 8, and the torsion spring 7 provides pressure for the over-travel of the opening and closing conductive rod 6, that is, the torsion spring 7 uses its elastic force to make the end moving contact of the opening and closing conductive rod 6 tightly squeezed on the static contact at the incoming terminal 15, so as to realize the closing of the circuit breaker; the opening and closing wrench 8 of this building is downward, and the opening and closing conductive rod 6 is separated from the incoming terminal 15 under the action of the opening and closing wrench 8, that is, it is in the disconnected state, at this time, the moving contact at the end of the opening and closing conductive rod 6 is in contact with the static contact of the incoming terminal 15.

[0030] Automatic opening and closing process: connect the external power supply to energize the coil on the magnetic holding bracket 12. After the coil is energized, a magnetic field is generated. The permanent magnet 10 moves under the action of the magnetic field, and then drives the opening and closing wrench 8 to move, thereby realizing opening and closing. Specifically, by changing the direction of the coil current, the N pole and S pole of the generated magnetic field are changed, so that the permanent magnet 10 drives the attraction piece 9 to swing back and forth, and then drives the opening and closing wrench 8 to move upward or downward, thereby realizing the opening and closing of the circuit breaker.

[0031] Except for the technical features described in the specification, the other technical features are known technologies to those skilled in the art.

Claims

1. An intelligent circuit breaker, comprising a plurality of housings (1) having the same structure, characterized in that: Each housing (1) is provided with an outlet terminal (2), a current transformer (3), a zero-sequence transformer (4), an opening and closing conductive rod (6), an opening and closing wrench (8), a magnetic attraction structure, an inlet terminal (15) and an arc extinguishing cover (16). The outlet terminal (2) is connected to the opening and closing conductive rod (6) through a wire (5) passing through the current transformer (3); a zero-sequence transformer (4) is provided outside the current transformer (3); the middle of the opening and closing conductive rod (6) is stuck in the switch wrench; a torsion spring (7) is provided between the opening and closing conductive rod (6) and the switch wrench; the bottom of the opening and closing conductive rod (6) is movably connected to the incoming terminal (15); and an arc extinguishing cover (16) is provided at the connection between the incoming terminal (15) and the opening and closing conductive rod (6); The rear end of the opening and closing wrench (8) is provided with a magnetic holding structure, which comprises two attracting parts (9), a permanent magnet (10), a magnetic holding bracket (12), two L-shaped frames (14) and an iron core (13), wherein the two attracting parts (9) are parallel to each other, and the permanent magnet (10) is arranged between the two attracting parts (9), wherein a blocking plate (11) is provided at the rear end of the rear attracting part (9), and the two ends of the blocking plate (11) are connected to the switch wrench, and the magnetic holding bracket (12) is arranged on the rear side of the blocking plate (11), and the iron core (13) is provided inside the magnetic holding bracket (12), and a plurality of turns of coil are wound outside, and L-shaped frames (14) are provided at the upper and lower ends of the magnetic holding bracket (12), respectively, and one end of the L-shaped frame (14) is fixed to the magnetic holding bracket (12), and the other end is clamped between the two attracting parts (9).

2. The intelligent circuit breaker according to claim 1, characterized in that: It also includes a power module, a communication module and a control module, wherein the power module is connected to the communication module and the control module in sequence via a pin connector, wherein a capacitor (17) with a charging and discharging function is used on the power module.

3. The intelligent circuit breaker according to claim 1, characterized in that: The shell (1) is provided with a fixing hole, and all the shells (1) are fixedly connected by rivets (18) passing through the fixing holes in sequence.

4. The intelligent circuit breaker according to claim 1, characterized in that: A pin hole is provided at the front end of each opening and closing wrench (8), and all the opening and closing wrenches (8) are connected by rivets (18) passing through the pin holes.

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