Quick tripping system of circuit breaker

Abstract

The utility model relates to a circuit breaker, in particular to a quick tripping system of a circuit breaker, which comprises a power supply device, the power supply device comprises a silicon controlled rectifier, a capacitor and a power supply, the capacitor and the power supply are arranged in parallel, and the silicon controlled rectifier is arranged on the capacitor and is connected with the anode of the power supply; the driving device is arranged on the circuit breaker and is connected with the silicon controlled rectifier and the negative electrode of the capacitor; and the opening device is arranged on the circuit breaker and is opposite to the driving device, and the driving device is used for driving the opening device to open. According to the circuit breaker rapid tripping system provided by the utility model, the voltage of a driving power supply can be accurately improved by using capacitor energy storage, so that the tripping force is larger, and the electrical opening and tripping speed of the circuit breaker is higher.

Description

Technical Field

[0001] The utility model relates to a circuit breaker, in particular to a circuit breaker quick tripping system. Background Art

[0002] Power transmission and distribution typically use circuit breakers for electrical tripping operations. Currently, relays are primarily used to control the operation of electromagnets based on the principle of controlling AC and DC low-power electromagnetic coil circuits. This spring-energy-storage circuit breaker tripping release has drawbacks such as long relay response time and slow electromagnetic coil operation, resulting in a long circuit breaker tripping time, typically 20-40ms. Utility Model Content

[0003] In order to solve the problem of long relay response time, the utility model provides a circuit breaker fast tripping system, the specific technical solution is as follows:

[0004] A circuit breaker rapid tripping system comprises: a power supply device, the power supply device comprising a thyristor, a capacitor arranged in parallel, and a power supply, the thyristor being arranged to be connected to the positive electrode of the capacitor and the power supply; a drive device, provided on the circuit breaker and connected to the thyristor and the negative electrode of the capacitor; and an opening device, provided on the circuit breaker and arranged opposite to the drive device, the drive device being used to drive the opening device to open.

[0005] Preferably, the driving device comprises an eddy current device or an electromagnet.

[0006] Preferably, the eddy current device includes: an eddy current striker, which is arranged opposite to the tripping device; an eddy current metal disk, which is arranged on the eddy current striker; an eddy current seat, which is arranged on the circuit breaker; an eddy current coil, which is arranged on the eddy current seat and opposite to the eddy current metal disk, and the eddy current striker is movably inserted into the eddy current coil and the eddy current seat, and the eddy current coil is respectively connected to the negative pole of the thyristor and the capacitor.

[0007] Preferably, the electromagnet includes: an electromagnetic striker, which is arranged opposite to the tripping device; an electromagnetic seat, which is provided on the circuit breaker and movably connected to the electromagnetic striker; an electromagnetic coil, which is provided on the electromagnetic seat and movably inserted into the electromagnetic striker, and the electromagnetic coil is respectively connected to the negative pole of the thyristor and the capacitor; and an electromagnetic spring, which is movably provided on the electromagnetic striker and respectively connected to the electromagnetic striker and the electromagnetic seat.

[0008] Furthermore, the tripping device includes: a limit shaft, rotatably provided on the circuit breaker; a strike plate, provided on the limit shaft; a stop block, rotatably provided on the circuit breaker and arranged opposite to the release groove on the limit shaft; a limit plate, rotatably provided on the stop block; a positioning shaft, rotatably provided on the circuit breaker; a limit crank arm, one end of which is provided on the positioning shaft; a limit rod, provided on the other end of the limit crank arm and movably rests against the limit plate; a connecting crank arm, one end of which is provided on the other end of the limit crank arm; an upper connecting shaft, provided on the other end of the connecting crank arm; a connecting plate, one end of which is rotatably provided on the upper connecting shaft; a lower connecting shaft, provided on the other end of the connecting plate; a main crank arm, rotatably provided on the circuit breaker, one end of which is rotatably connected to the lower connecting shaft, and the other end of which is rotatably connected to the insulating pull rod; and a tripping spring, both ends of which are respectively connected to the main crank arm and the circuit breaker.

[0009] Furthermore, a blocking arm is provided on the blocking block, and the blocking arm is movably pressed against the limiting shaft and is arranged opposite to the release slot.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The utility model provides a circuit breaker rapid tripping system which uses capacitor energy storage to accurately increase the driving power supply voltage, thereby making the tripping force greater and further making the circuit breaker electrical opening and tripping speed faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of embodiment 1;

[0013] Figure 2 It is a structural diagram of embodiment 2. DETAILED DESCRIPTION

[0014] The present invention will now be further described with reference to the accompanying drawings.

[0015] Example 1

[0016] like Figure 1 As shown, a circuit breaker quick tripping system includes a power supply device, a drive device and a tripping device. The power supply device includes a thyristor 23, a capacitor 22 and a power supply 21 arranged in parallel. The thyristor 23 is arranged to be connected to the positive pole of the capacitor 22 and the power supply 21; the drive device is installed on the circuit breaker and is connected to the negative pole of the thyristor 23 and the capacitor 22; the tripping device is installed on the circuit breaker and is arranged opposite to the drive device. The drive device is used to drive the tripping device to open.

[0017] The eddy current device includes an eddy current striker 11, an eddy current metal disc 12, an eddy current seat 14 and an eddy current coil 13. The eddy current striker 11 is installed on the eddy current metal disc 12. The eddy current metal disc 12 and the eddy current coil 13 are arranged opposite each other. The eddy current coil 13 is fixed on the eddy current seat 14. The eddy current seat 14 is fixed on the circuit breaker and arranged horizontally. The eddy current striker 11 is movably inserted into the eddy current coil 13 and the eddy current seat 14 and arranged vertically. A limiting ring is provided at the bottom of the eddy current striker 11. The limiting ring is stuck at the bottom of the eddy current seat 14 to limit the position where the eddy current striker 11 extends. The eddy current coil 13 is connected to the negative pole of the thyristor 23 and the capacitor 22 respectively.

[0018] The thyristor 23 is arranged between the positive electrode and the eddy current coil 13, which can improve the opening time of the circuit breaker and shorten the opening time to 5-10ms.

[0019] The tripping device includes a limit shaft 31, a striker plate 312, a stopper 32, a positioning shaft 36, a limit crank arm 34, a limit rod 35, a connecting crank arm 37, an upper connecting shaft 391, a connecting piece 38, a lower connecting shaft 392, a main crank arm 4, and a tripping spring 30. The limit shaft 31 is rotatably mounted on the circuit breaker and is provided with a release slot 311. The limit shaft 31 is equipped with a striker plate 312, which is located above the eddy current striker. The stopper 32 is rotatably mounted on the circuit breaker and has a stopper arm 321 at one end and a stopper arm 321 at the other end, which is rotatably connected to the limit plate 33. The stopper arm 321 is movably supported against the limit shaft 31 and is arranged opposite to the release slot 311 on the limit shaft 31. When the limit shaft 31 rotates, the stopper arm 321 enters the release slot 311, allowing the stopper 32 to rotate freely. The positioning shaft 36 is rotatably mounted on the circuit breaker and is respectively connected to one end of the limiting crank arm 34 and the connecting crank arm 37. The other end of the limiting crank arm 34 is equipped with a limiting rod 35, which movably abuts against the limiting plate 33. The other end of the connecting crank arm 37 is connected to the upper connecting shaft 391, which is rotatably connected to one end of the connecting plate 38. The other end of the connecting plate 38 is rotatably connected to one end of the main crank arm 4 via the lower connecting shaft 392. The main crank arm 4 is rotatably mounted on the circuit breaker via the crank arm shaft 41. The other end of the main crank arm 4 is rotatably connected to the insulating pull rod 51, which is connected to the vacuum switch 5. The two ends of the trip spring 30 are respectively connected to the main crank arm 4 and the circuit breaker, and are located between the crank arm shaft 41 and the lower connecting shaft 392.

[0020] When the switch is closed, the opening spring 30 is in a stretched state, the connecting piece 38 is pushed upward, the connecting piece 38, the connecting arm 37, the limiting arm 34, the limiting plate 33, the block 32 and the limiting shaft 31 are in a balanced state and are all subjected to an upward force.

[0021] When the thyristor 23 is in the non-conducting state, no current flows through the eddy current coil 13, and the eddy current metal disk 12 is pressed downward on the eddy current coil 13 by gravity; when the thyristor 23 is opened, the capacitor 22, the thyristor 23 and the eddy current coil 13 form a discharge circuit, and the pulse current flowing through the eddy current coil 13 generates a repulsive force on the eddy current metal disk 12, which pushes the eddy current metal disk 12. The eddy current metal disk 12 drives the eddy current striker 11 to strike the striker plate 312 upward, and the striker plate 312 The limit shaft 31 is driven to rotate. When the release slot 311 rotates to be opposite to the stop arm 321, the limit plate 33 pushes the stop block 32 to rotate, and the stop arm 321 enters the release slot 311. The limit plate 33 moves upward, and the limit crank arm 34, the connecting crank arm 37 and the connecting piece 38 all rotate upward. There is no resistance above the main crank arm 4. The main crank arm 4 rotates around the crank arm shaft 41 under the action of the opening spring 30, driving the insulating pull rod 51 to move downward, thereby realizing the opening of the vacuum switch 5.

[0022] The response time of the thyristor 23 is extremely short, with almost no delay, which makes the circuit breaker trip faster. Using capacitor 22 to store energy can accurately increase the voltage of the drive power supply 21, thereby increasing the eddy current repulsion force and making the circuit breaker trip faster.

[0023] The above measures can reduce the opening time of conventional circuit breakers. The faster the opening, the faster the fault can be cleared when a short circuit fault occurs in the power system, which has high economic benefits.

[0024] Example 2

[0025] like Figure 2 As shown, the difference between this embodiment and the first embodiment is that the driving device includes an electromagnet, and the electromagnet includes an electromagnetic striker 72, an electromagnetic seat 71, an electromagnetic coil 73 and an electromagnetic spring 74. The electromagnetic seat 71 is fixed on the circuit breaker, and the electromagnetic striker 72 is movably inserted into the electromagnetic seat 71 and is arranged opposite to the tripping device; the electromagnetic coil 73 is installed on the electromagnetic seat 71, and the electromagnetic coil 73 is respectively connected to the negative pole of the thyristor 23 and the capacitor 22, and the electromagnetic striker 72 is also movably inserted into the electromagnetic coil 73; the electromagnetic spring 74 is movably inserted into the electromagnetic striker 72, and the two ends of the electromagnetic spring 74 are respectively against the electromagnetic striker 72 and the electromagnetic seat 71.

[0026] The response time of the thyristor 23 is extremely short, with almost no delay, which makes the circuit breaker trip faster. Using capacitor 22 to store energy can accurately increase the voltage of the drive power supply 21, making the electromagnetic repulsion greater, and thus making the circuit breaker trip faster.

[0027] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific embodiments of the present invention without inventive effort, and such embodiments will fall within the scope of protection of the claims of the present invention.

Claims

1. A circuit breaker quick tripping system, characterized in that: include: A power supply device, comprising a thyristor (23), a capacitor (22) and a power supply (21) connected in parallel, wherein the thyristor (23) is connected to the positive electrodes of the capacitor (22) and the power supply (21); A driving device is provided on the circuit breaker and is connected to the thyristor (23) and the negative electrode of the capacitor (22); as well as A tripping device is provided on the circuit breaker and is arranged opposite to the driving device, and the driving device is used to drive the tripping device to open; The driving device includes an electromagnet; The electromagnet comprises: An electromagnetic striker (72) is arranged opposite to the opening device; An electromagnetic seat (71) is provided on the circuit breaker and is movably connected to the electromagnetic striker (72); An electromagnetic coil (73) is provided on the electromagnetic seat (71) and is movably inserted into the electromagnetic striker (72), wherein the electromagnetic coil (73) is respectively connected to the negative electrode of the thyristor (23) and the capacitor (22); and An electromagnetic spring (74) is movably arranged on the electromagnetic striker (72) and is respectively connected to the electromagnetic striker (72) and the electromagnetic seat (71).

2. A circuit breaker quick trip system according to claim 1, characterized in that: The opening device comprises: A limit shaft (31) is rotatably mounted on the circuit breaker; A striker plate (312) is provided on the limiting shaft (31); A stopper (32) is rotatably mounted on the circuit breaker and is disposed opposite to the release groove (311) on the limiting shaft (31); A limiting plate (33) is rotatably mounted on the stopper (32); A positioning shaft (36) rotatably mounted on the circuit breaker; A limiting crank arm (34), one end of which is disposed on the positioning shaft (36); A limiting rod (35) is provided at the other end of the limiting arm (34) and is movably supported against the limiting plate (33); A connecting crank arm (37), one end of which is arranged at the other end of the limiting crank arm (34); An upper connecting shaft (391) is provided at the other end of the connecting arm (37); A connecting piece (38), one end of which is rotatably mounted on the upper connecting shaft (391); a lower connecting shaft (392) provided at the other end of the connecting piece (38); A main crank arm (4) is rotatably mounted on the circuit breaker, one end of the main crank arm being rotatably connected to the lower connecting shaft (392) and the other end of the main crank arm being rotatably connected to the insulating pull rod (51); and The opening spring (30) has two ends connected to the main crank arm (4) and the circuit breaker respectively.

3. A circuit breaker quick trip system according to claim 2, characterized in that: A blocking arm (321) is provided on the blocking block (32), and the blocking arm (321) is movably pressed against the limiting shaft (31) and is arranged opposite to the releasing groove (311).

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