Electromagnetic protection mechanism for digital circuit breaker

Abstract

The utility model discloses an electromagnetic protection mechanism for a digital circuit breaker, which comprises a circuit breaker shell, an electromagnetic protection mechanism, an operating mechanism and an arc extinguishing mechanism are arranged in the middle of the inner side of the circuit breaker shell, and incoming and outgoing line structures are arranged at two ends of the inner side of the circuit breaker shell. According to the digital circuit breaker, the first connecting piece and the second connecting piece are connected with the internal circuit of the circuit breaker, so that the coil is connected with the internal circuit of the circuit breaker, and when the circuit breaker has a short-circuit fault, the current of the internal circuit of the circuit breaker is instantly increased, so that the current flowing through the coil is instantly increased, and the coil generates a relatively large electromagnetic force; therefore, the movable iron core can be driven to slide towards the static iron core, the push rod is driven to move, the push rod penetrates through the second through groove to drive the operation mechanism to act, then the movable contact and the static contact are driven to be timely disconnected, and the circuit breaker can be effectively prevented from being damaged due to open circuit.

Description

Technical Field

[0001] The utility model relates to the field of digital circuit breakers, in particular to an electromagnetic protection mechanism for digital circuit breakers. Background Art

[0002] A circuit breaker is a switching device that can close, carry and interrupt current under normal circuit conditions and can close, carry and interrupt current under abnormal circuit conditions within a specified time. Circuit breakers can also be used to distribute electrical energy, start asynchronous motors infrequently, and protect power lines and motors. However, when a short circuit occurs in the internal circuit of a circuit breaker, it is not easy to drive the moving and static contacts to disconnect in time, making the circuit breaker vulnerable to damage.

[0003] In order to solve the above problems, an electromagnetic protection mechanism for a digital circuit breaker is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide an electromagnetic protection mechanism for a digital circuit breaker to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electromagnetic protection mechanism for a digital circuit breaker, comprising a circuit breaker housing, an electromagnetic protection mechanism, an operating mechanism and an arc extinguishing mechanism are arranged in the middle of the inner side of the circuit breaker housing, both ends of the inner side of the circuit breaker housing are provided with input and output line structures, the electromagnetic protection mechanism comprises a mounting seat, a coil is arranged on the surface of the mounting seat, a shell and a static iron core are respectively arranged at both ends of the inner side of the mounting seat, the shell is engaged with the static iron core, a moving iron core is slidably arranged at one end of the inner side of the shell, a push rod is fixedly arranged at one end of the moving iron core, a first through slot is opened at one end of the push rod, a second through slot is opened on the inner side of the first through slot, a reset spring is sleeved on the surface of the push rod, and the reset spring is arranged corresponding to the first through slot.

[0006] The digital circuit breaker is connected to the internal circuit of the circuit breaker through the first connecting member and the second connecting member, so that the coil is connected to the internal circuit of the circuit breaker. When a short circuit occurs in the circuit breaker, the current in the internal circuit of the circuit breaker will increase instantaneously, so that the current flowing through the coil will increase instantaneously, and the coil will generate a large electromagnetic force, which can drive the moving iron core to slide in the direction of the static iron core, thereby driving the push rod to move, so that the push rod passes through the second through slot and drives the operating mechanism to move, and then drives the moving and static contacts to disconnect in time, which can effectively prevent the circuit breaker from being damaged due to the circuit breaker breaking. The setting of the reset spring facilitates the resetting of the moving iron core.

[0007] Preferably, one end of the coil is fixedly connected to a first conductive member, an end of the first conductive member away from the coil is fixedly connected to a mounting plate, and the top of the mounting plate is fixedly connected to a first connecting member, and the first connecting member is arranged to facilitate connection with the internal circuit of the circuit breaker.

[0008] Preferably, a connection block is fixedly provided at the connection between the mounting plate and the first conductive member, and the strength of the connection between the mounting plate and the first conductive member can be improved by providing the connection block.

[0009] Preferably, one end of the coil away from the first conductive member is fixedly connected to a second conductive member, and a second connecting member is fixedly provided at the bottom end of the second conductive member, so that the second connecting member is conveniently connected to the internal circuit of the circuit breaker.

[0010] Preferably, a reinforcement block is fixedly provided at the connection between the second conductive member and the second connecting member, and the strength of the connection between the second conductive member and the second connecting member can be improved by providing the reinforcement block.

[0011] Preferably, a first mounting groove is provided at the connection between the mounting seat and the static iron core, and a second mounting groove is provided at the connection between the mounting seat and the shell. The provision of the first mounting groove and the second mounting groove facilitates fixed installation of the shell and the static iron core.

[0012] Preferably, the push rod and the second through slot are interlaced with each other, and the provision of the second through slot can facilitate the telescopic movement of the push rod.

[0013] Compared with the previous technology, the beneficial effect of the utility model is that the digital circuit breaker is connected to the internal circuit of the circuit breaker through the first connecting piece and the second connecting piece, so that the coil is connected to the internal circuit of the circuit breaker. When a short circuit occurs in the circuit breaker, the current in the internal circuit of the circuit breaker will increase instantaneously, so that the current flowing through the coil will increase instantaneously, and the coil will generate a large electromagnetic force, which can drive the moving iron core to slide in the direction of the static iron core, thereby driving the push rod to move, so that the push rod passes through the second through slot and drives the operating mechanism to move, and then drives the moving and static contacts to disconnect in time, which can effectively prevent the circuit breaker from being damaged due to the circuit breaker. The setting of the reset spring facilitates the resetting of the moving iron core. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the circuit breaker of the utility model;

[0015] Figure 2 This is a first stereoscopic diagram of the electromagnetic protection mechanism of the utility model;

[0016] Figure 3 This is a second stereoscopic diagram of the electromagnetic protection mechanism of the utility model;

[0017] Figure 4It is a partial cross-sectional view of the electromagnetic protection mechanism of the utility model;

[0018] Figure 5 It is a front sectional view of the electromagnetic protection mechanism of the utility model.

[0019] In the figure: 1. circuit breaker housing; 2. electromagnetic protection mechanism; 21. mounting seat; 22. housing; 23. coil; 24. static iron core; 25. first mounting groove; 26. first conductive member; 27. connecting block; 28. mounting plate; 29. ​​first connecting member; 210. second conductive member; 211. second connecting member; 212. reinforcement block; 213. moving iron core; 214. reset spring; 215. push rod; 216. first through groove; 217. second through groove; 218. second mounting groove; 3. operating mechanism; 4. arc extinguishing mechanism; 5. incoming and outgoing line structure. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] See also Figure 1-5 The utility model provides an electromagnetic protection mechanism for a digital circuit breaker, comprising a circuit breaker housing 1, an electromagnetic protection mechanism 2, an operating mechanism 3 and an arc extinguishing mechanism 4 are arranged in the middle of the inner side of the circuit breaker housing 1, both ends of the inner side of the circuit breaker housing 1 are provided with an inlet and outlet line structure 5, the electromagnetic protection mechanism 2 comprises a mounting seat 21, a coil 23 is arranged on the surface of the mounting seat 21, a shell 22 and a static iron core 24 are arranged at both ends of the inner side of the mounting seat 21, the shell 22 is connected with the static iron core 24 by snapping, a moving iron core 213 is slidably arranged at one end of the inner side of the shell 22, a push rod 215 is fixedly arranged at one end of the moving iron core 213, a first through slot 216 is opened at one end of the push rod 215, a second through slot 217 is opened on the inner side of the first through slot 216, and a reset spring 2 is sleeved on the surface of the push rod 215 14. The reset spring 214 is arranged corresponding to the first through slot 216. The digital circuit breaker is connected to the internal circuit of the circuit breaker through the first connecting member 29 and the second connecting member 211, so that the coil 23 is connected to the internal circuit of the circuit breaker. When a short circuit occurs in the circuit breaker, the current in the internal circuit of the circuit breaker will increase instantaneously, so that the current flowing through the coil 23 will increase instantaneously, and the coil 23 will generate a large electromagnetic force, which can drive the moving iron core 213 to slide toward the static iron core 24, thereby driving the push rod 215 to move, so that the push rod 215 passes through the second through slot 217 and drives the operating mechanism 3 to move, and then drives the moving and static contacts to disconnect in time, which can effectively prevent the circuit breaker from being damaged due to the circuit breaker. The setting of the reset spring 214 facilitates the resetting of the moving iron core 213.

[0022] One end of the coil 23 is fixedly connected to a first conductive member 26, one end of the first conductive member 26 away from the coil 23 is fixedly connected to a mounting plate 28, a top end of the mounting plate 28 is fixedly connected to a first connecting member 29, a connecting block 27 is fixedly provided at the connection between the mounting plate 28 and the first conductive member 26, one end of the coil 23 away from the first conductive member 26 is fixedly connected to a second conductive member 210, a bottom end of the second conductive member 210 is fixedly provided with a second connecting member 211;

[0023] When in use, the first connector 29 is provided to facilitate connection with the internal circuit of the circuit breaker, the connection block 27 is provided to improve the strength of the connection between the mounting plate 28 and the first conductive member 26, and the second connector 211 is provided to facilitate connection with the internal circuit of the circuit breaker;

[0024] A reinforcing block 212 is fixedly provided at the connection between the second conductive member 210 and the second connecting member 211, a first mounting groove 25 is provided at the connection between the mounting seat 21 and the static iron core 24, a second mounting groove 218 is provided at the connection between the mounting seat 21 and the housing 22, and a push rod 215 and a second through groove 217 are interlaced.

[0025] When in use, the reinforcement block 212 can improve the strength of the connection between the second conductive member 210 and the second connecting member 211. The first mounting groove 25 and the second mounting groove 218 can facilitate the fixed installation of the shell 22 and the static iron core 24. The second through groove 217 can facilitate the telescopic movement of the push rod 215.

[0026] When the embodiment of the present application is in use: the digital circuit breaker is connected to the internal circuit of the circuit breaker through the first connecting member 29 and the second connecting member 211, so that the coil 23 is connected to the internal circuit of the circuit breaker. When a short circuit occurs in the circuit breaker, the current in the internal circuit of the circuit breaker will increase instantaneously, so that the current flowing through the coil 23 increases instantaneously, and the coil 23 will generate a large electromagnetic force, which can drive the moving iron core 213 to slide in the direction of the static iron core 24, thereby driving the push rod 215 to move, so that the push rod 215 passes through the second through groove 217 and drives the operating mechanism 3 to operate, and then drives the moving and static contacts to disconnect in time, which can effectively prevent the circuit breaker from being damaged due to the circuit breaker. The setting of the reset spring 214 facilitates the resetting of the moving iron core 213.

[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electromagnetic protection mechanism for a digital circuit breaker, comprising a circuit breaker housing (1), characterized in that: An electromagnetic protection mechanism (2), an operating mechanism (3) and an arc extinguishing mechanism (4) are arranged in the middle of the inner side of the circuit breaker housing (1); both ends of the inner side of the circuit breaker housing (1) are provided with an inlet and outlet wire structure (5); the electromagnetic protection mechanism (2) comprises a mounting seat (21); a coil (23) is arranged on the surface of the mounting seat (21); a housing (22) and a static iron core (24) are respectively arranged at both ends of the inner side of the mounting seat (21); the housing (22) and the static iron core (24) are connected to each other. 4) a snap-fit ​​connection, wherein a moving iron core (213) is slidably provided at one end of the inner side of the shell (22), a push rod (215) is fixedly provided at one end of the moving iron core (213), a first through slot (216) is provided at one end of the push rod (215), a second through slot (217) is provided on the inner side of the first through slot (216), a return spring (214) is sleeved on the surface of the push rod (215), and the return spring (214) is provided corresponding to the first through slot (216).

2. The electromagnetic protection mechanism for a digital circuit breaker according to claim 1, characterized in that: One end of the coil (23) is fixedly connected to a first conductive member (26), one end of the first conductive member (26) away from the coil (23) is fixedly connected to a mounting plate (28), and the top end of the mounting plate (28) is fixedly connected to a first connecting member (29).

3. The electromagnetic protection mechanism for a digital circuit breaker according to claim 2, characterized in that: A connecting block (27) is fixedly provided at the connection between the mounting plate (28) and the first conductive member (26).

4. The electromagnetic protection mechanism for a digital circuit breaker according to claim 2, characterized in that: One end of the coil (23) away from the first conductive member (26) is fixedly connected to a second conductive member (210), and a second connecting member (211) is fixedly provided at the bottom end of the second conductive member (210).

5. The electromagnetic protection mechanism for a digital circuit breaker according to claim 4, characterized in that: A reinforcement block (212) is fixedly provided at the connection between the second conductive member (210) and the second connecting member (211).

6. The electromagnetic protection mechanism for a digital circuit breaker according to claim 1, characterized in that: A first mounting groove (25) is provided at the connection between the mounting seat (21) and the static iron core (24), and a second mounting groove (218) is provided at the connection between the mounting seat (21) and the housing (22).

7. The electromagnetic protection mechanism for a digital circuit breaker according to claim 1, characterized in that: The push rod (215) and the second through groove (217) are interlaced.

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