Opening eddy current repulsion tripping system for spring energy storage type circuit breaker

Abstract

The utility model relates to an opening system of a circuit breaker in electric power transmission and distribution, in particular to an opening eddy current repulsion tripping system for a spring energy storage type circuit breaker, which comprises a limiting shaft, an eddy current repulsion tripping device and a spring energy storage type circuit breaker, the collision plate is arranged on the limiting shaft; the collision rod is movably arranged below the collision plate; the vortex metal disc is arranged on the sinker bar; the eddy current seat is arranged on the circuit breaker; the eddy current coil is arranged on the eddy current seat and is opposite to the eddy current metal disc, and the sinker bar is movably inserted on the eddy current coil and the eddy current seat; the eddy current control device is connected with the eddy current coil; and the tripping device is arranged on the circuit breaker and is respectively connected with the limiting shaft and the insulating pull rod. According to the spring energy storage type circuit breaker opening eddy current repulsive force tripping system, tripping is carried out through an eddy current repulsive force structure, the eddy current metal disc drives the sinker bar to carry out quick tripping and opening, the response speed is high, and the tripping force is large and stable.

Description

Technical Field

[0001] The utility model relates to a circuit breaker opening system in power transmission and distribution, in particular to an eddy current repulsion tripping system for spring energy storage type circuit breaker opening. Background Art

[0002] Electric power transmission and distribution usually use circuit breakers for electrical tripping operations. Currently, the principle of controlling AC and DC low-power electromagnetic coil circuits by relays is mainly used to control the action of electromagnets. As a spring energy storage circuit breaker tripping release, there are defects such as long relay response time and slow electromagnetic coil action, which leads to a long circuit breaker tripping time, usually 20-40ms. Utility Model Content

[0003] In order to solve the problem of long response time of the above-mentioned relay, the utility model provides an eddy current repulsion tripping system for spring energy storage type circuit breaker opening, and the specific technical solution is as follows:

[0004] A spring energy storage type circuit breaker opening eddy current repulsion tripping system comprises: a limit shaft, rotatably arranged on the circuit breaker; a striker plate, arranged on the limit shaft; a striker rod, movably arranged below the striker plate; an eddy current metal disk, arranged on the striker rod; an eddy current seat, arranged on the circuit breaker; an eddy current coil, arranged on the eddy current seat and arranged opposite to the eddy current metal disk, the striker rod movably inserted into the eddy current coil and the eddy current seat; an eddy current control device, connected to the eddy current coil; and a tripping device, arranged on the circuit breaker and respectively connected to the limit shaft and the insulating pull rod.

[0005] Preferably, a limiting ring is provided at the bottom of the striker rod.

[0006] Preferably, the eddy current control device includes: a power supply, whose positive and negative poles are respectively connected to the eddy current coil; a capacitor, which is connected in parallel with the eddy current coil between the positive and negative poles of the power supply; and a thyristor, which is arranged between the positive pole and the eddy current coil.

[0007] Preferably, the tripping device includes: a block rotatably disposed on the circuit breaker and arranged opposite to the release groove on the limit shaft; a limit plate rotatably disposed on the block; a positioning shaft rotatably disposed on the circuit breaker; a limit crank arm, one end of which is disposed on the positioning shaft; a limit rod, which is disposed at the other end of the limit crank arm and movably abuts against the limit plate; a connecting crank arm, one end of which is disposed on the other end of the limit crank arm; an upper connecting shaft, which is disposed at the other end of the connecting crank arm; a connecting plate, one end of which is rotatably disposed on the upper connecting shaft; a lower connecting shaft, which is disposed at the other end of the connecting plate; a main crank arm rotatably disposed 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 trip spring, whose two ends are respectively connected to the main crank arm and the circuit breaker.

[0008] Preferably, a blocking arm is provided on the blocking block, and the blocking plate movably abuts against the limiting shaft and is arranged opposite to the releasing groove.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] The utility model provides an eddy current repulsion tripping system for spring energy storage type circuit breaker opening, which is tripped by an eddy current repulsion structure, and the eddy current metal disk drives the striker to quickly trip and open the circuit, with fast response speed, large and stable tripping force. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the utility model. DETAILED DESCRIPTION

[0012] The utility model is now further described with reference to the accompanying drawings.

[0013] like Figure 1 As shown, a spring energy storage type circuit breaker opening eddy current repulsion tripping system includes a limit shaft 31, a striker plate 312, a striker rod 11, an eddy current metal disc 12, an eddy current seat 14, an eddy current coil 13, an eddy current control device and a tripping device. The limit shaft 31 is rotatably mounted on the circuit breaker, and a release groove 311 is provided on the limit shaft 31, and the release groove 311 is arranged opposite to the tripping device. The limit shaft 31 is provided with a striker plate 312, which is located above the striker rod 11. The striker rod 11 is installed on the eddy current metal disk 12, which is arranged opposite to the eddy current coil 13, which is fixed on the eddy current seat 14, which is fixed on the circuit breaker and arranged horizontally; the striker rod 11 is movably inserted into the eddy current coil 13 and the eddy current seat 14, and is arranged vertically, and a limit ring 111 is provided at the bottom of the striker rod 11, which is stuck at the bottom of the eddy current seat 14 to limit the position where the striker rod 11 extends. The eddy current control device is connected to the eddy current coil 13; the tripping device is installed on the circuit breaker, and is respectively connected to the limit shaft 31 and the insulating pull rod 51. The eddy current control device includes a power supply 21, a capacitor 22 and a thyristor 23. The capacitor 22 and the eddy current coil 13 are connected in parallel to the positive and negative poles of the power supply 21. The thyristor 23 is arranged between the positive pole and the eddy current coil 13, which can improve the opening time of the circuit breaker and shorten the opening time to 5-10ms.

[0014] The tripping device includes a stopper 32, a positioning shaft 36, a limit arm 34, a limit rod 35, a connecting arm 37, an upper connecting shaft 391, a connecting piece 38, a lower connecting shaft 392, a main arm 4 and a trip spring 30. The stopper 32 is rotatably mounted on the circuit breaker, one end of the stopper 32 is provided with a stopper arm 321, and the other end is rotatably connected with the limit plate 33, forming an L-shape as a whole, the stopper arm 321 movably abuts against the limit shaft 31, and is arranged opposite to the release groove 311 on the limit shaft 31, when the limit shaft 31 rotates, the stopper arm 321 enters the release groove 311, and the stopper 32 can rotate freely. The positioning shaft 36 is rotatably mounted on the circuit breaker, and is respectively connected with one end of the limit arm 34 and the connecting arm 37, the other end of the limit arm 34 is provided with a limit rod 35, and the limit rod 35 movably abuts against the limit plate 33. The other end of the connecting crank arm 37 is connected to the upper connecting shaft 391, the upper connecting shaft 391 is rotatably connected to one end of the connecting piece 38, the other end of the connecting piece 38 is rotatably connected to one end of the main crank arm 4 through the lower connecting shaft 392, the main crank arm 4 is rotatably mounted on the circuit breaker through the crank arm shaft 41, the other end of the main crank arm 4 is rotatably connected to the insulating pull rod 51, and the insulating pull rod 51 is connected to the vacuum switch 5. The two ends of the opening 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.

[0015] When the switch is in the closed state, 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 stopper 32 and the limiting shaft 31 are in a balanced state and all receive an upward force.

[0016] 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 to push the eddy current metal disk 12, and the eddy current metal disk 12 drives the striker 11 to strike the striker plate 312 upward, and the striker plate 312 carries The movable limit shaft 31 rotates, and 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, the stop arm 321 enters the release slot 311, the limit plate 33 moves upward, the limit crank arm 34, the connecting crank arm 37 and the connecting plate 38 all rotate upward, and 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.

[0017] The response time of the thyristor 23 is extremely short, with almost no delay, which makes the circuit breaker electrical opening tripping faster. Using the capacitor 22 to store energy can accurately increase the voltage of the driving power supply 21, making the eddy current repulsion greater, which makes the circuit breaker electrical opening tripping faster.

[0018] 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 occurs in the power system, which has high economic benefits.

[0019] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the claims of the present invention.

Claims

1. An eddy current repulsion tripping system for spring energy storage circuit breaker opening, characterized in that: include: A limit shaft (31) is rotatably mounted on the circuit breaker; A striker plate (312) is arranged on the limiting shaft (31); A striker rod (11) movably disposed below the striker plate (312); An eddy current metal disk (12) is arranged on the striker rod (11); An eddy current seat (14) is arranged on the circuit breaker; An eddy current coil (13) is disposed on the eddy current seat (14) and is arranged opposite to the eddy current metal disk (12); the striker (11) is movably inserted into the eddy current coil (13) and the eddy current seat (14); an eddy current control device connected to the eddy current coil (13); and A tripping device is arranged on the circuit breaker and is respectively connected to the limit shaft (31) and the insulating pull rod (51).

2. The eddy current repulsion tripping system for opening of a spring energy storage circuit breaker according to claim 1, characterized in that: A limiting ring (111) is provided at the bottom of the striker rod (11).

3. The eddy current repulsion tripping system for opening of a spring energy storage type circuit breaker according to claim 1, characterized in that: The vortex control device comprises: A power source (21), the positive and negative electrodes of which are respectively connected to the eddy current coil (13); A capacitor (22) is connected in parallel with the eddy current coil (13) between the positive and negative electrodes of the power source (21); and The thyristor (23) is arranged between the positive electrode of the power source (21) and the eddy current coil (13).

4. The eddy current repulsion tripping system for opening of a spring energy storage type circuit breaker according to claim 1, characterized in that: The tripping device comprises: A stopper (32) is rotatably mounted on the circuit breaker and is arranged opposite to the release groove (311) on the limiting shaft (31); A limiting plate (33) rotatably disposed on the stopper (32); A positioning shaft (36) rotatably mounted on the circuit breaker; A limiting crank arm (34), one end of which is arranged on the positioning shaft (36); A limiting rod (35) is arranged at the other end of the limiting arm (34) and is movably pressed 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 arranged 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) is arranged at the other end of the connecting piece (38); A main crank arm (4) is rotatably mounted on the circuit breaker, one end of which is rotatably connected to the lower connecting shaft (392), and the other end of which is 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.

5. The eddy current repulsion tripping system for opening of a spring energy storage type circuit breaker according to claim 4, characterized in that: The stopper (32) is provided with a stop arm (321), the stop arm (321) movably abuts against the limit shaft (31) and is arranged opposite to the release groove (311).

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