Spring energy storage type circuit breaker eddy current repulsion opening device

Abstract

The utility model relates to a spring energy storage type circuit breaker eddy current repulsion opening device comprising a closing cam arranged on a closing driving device; one end of the closing crank arm is rotationally arranged on the circuit breaker and is opposite to the closing cam; the rotating shaft is rotationally arranged at the other end of the closing crank arm; one end of the large crank arm is arranged on the rotating shaft; the connecting shaft is arranged at the other end of the large crank arm; one end of the connecting sheet is rotationally arranged on the connecting shaft; one end of the main crank arm is rotationally connected with the other end of the connecting sheet, and the other end of the main crank arm is connected with the insulating pull rod; the opening tension spring is arranged on the circuit breaker and is connected with one end of the main crank arm; one end of the connecting rod is rotationally arranged on the connecting shaft; the eddy current coil is arranged on the circuit breaker, and the connecting rod is movably inserted into the eddy current coil; the eddy current disc is arranged opposite to the eddy current coil and is connected with the eddy current coil; and the eddy current control device is connected with the eddy current coil and is used for controlling the eddy current coil to push the eddy current disc to drive the connecting rod to release the main connecting lever, and the opening tension spring drives the main connecting lever to pull the insulating pull rod for opening. According to the opening device, the opening time and the opening speed of the high-voltage circuit breaker are improved, and the opening time is shortened to 5-10 ms.

Description

Technical Field

[0001] The utility model relates to a high-voltage spring-operated vacuum circuit breaker opening device, in particular to a high-voltage spring-operated vacuum circuit breaker opening device. Background Art

[0002] The opening of high-voltage electrical equipment is entirely dependent on the opening spring force to pull the opening switch. This structure results in the opening speed being not fast enough and the opening time being long. Usually the opening time is 20-40ms, which cannot meet the requirements of fast opening. Utility Model Content

[0003] In order to solve the above problem of long opening time, the utility model provides a spring energy storage type circuit breaker eddy current repulsion opening device, and the specific technical solution is as follows:

[0004] A spring energy storage type circuit breaker eddy current repulsion tripping device, comprising: a closing cam, arranged on a closing drive device; a closing crank arm, one end of which is rotatably arranged on the circuit breaker and arranged opposite to the closing cam; a rotating shaft, rotatably arranged on the other end of the closing crank arm; a large crank arm, one end of which is arranged on the rotating shaft; a connecting shaft, arranged on the other end of the large crank arm; a connecting piece, one end of which is rotatably arranged on the connecting shaft; a main crank arm, rotatably arranged on the circuit breaker, one end of which is rotatably connected to the other end of the connecting piece, and the other end of which is connected to an insulating pull rod; a closing cam ... A gate tension spring is provided on the circuit breaker and connected to one end of the main crank arm; a connecting rod, one end of which is rotatably provided on the connecting shaft; an eddy current coil is provided on the circuit breaker, and the connecting rod is movably inserted into the eddy current coil; an eddy current disk is arranged opposite to the eddy current coil and connected to the eddy current coil; and an eddy current control device is connected to the eddy current coil and is used to control the eddy current coil to push the eddy current disk to drive the connecting rod to release the main crank arm, and the opening gate tension spring drives the main crank arm to pull the insulating pull rod to open the gate.

[0005] 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 arranged 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.

[0006] Compared with the prior art, the utility model has the following beneficial effects:

[0007] The utility model provides a spring energy storage type circuit breaker eddy current repulsion tripping device that improves the tripping time and the tripping speed of the high voltage circuit breaker, and shortens the tripping time to 5-10ms.

[0008] The faster the opening speed, the stronger the breaking capacity of the circuit breaker. The shorter the opening time, the smaller the short-circuit heat collection of the circuit breaker and the better the breaking capacity. At the same time, the shorter the time to cut off the fault short circuit, the smaller the short-circuit current impact on the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of this application. DETAILED DESCRIPTION

[0010] The utility model is now further described with reference to the accompanying drawings.

[0011] like Figure 1 As shown, a spring energy storage type circuit breaker eddy current repulsion tripping device comprises a closing cam 11, a closing crank arm 12, a rotating shaft 13, a large crank arm 14, a connecting shaft 15, a connecting piece 16, a main crank arm 17, a tripping tension spring 18, a connecting rod 31, an eddy current coil 32, an eddy current disk 33 and an eddy current control device. The closing cam 11 is mounted on the closing drive device, one end of the closing crank arm 12 is rotatably mounted on the circuit breaker and is arranged opposite to the closing cam 11, and the closing cam 11 is used to drive the closing crank arm 12 to rotate. The rotating shaft 13 is rotatably mounted on the other end of the closing crank arm 12; one end of the large crank arm 14 is fixed on the rotating shaft 13, and the other end is fixed with a connecting shaft 15, and the connecting shaft 15 is rotatably connected to the connecting rod 31 and the connecting piece 16 respectively; the other end of the connecting piece 16 is also rotatably connected to one end of the main crank arm 17, and the main crank arm 17 is rotatably mounted on the circuit breaker through the crank arm shaft 19, and the other end of the main crank arm 17 is rotatably connected to the insulating pull rod 21, and the insulating pull rod 21 is connected to the vacuum tube 22. The crank arm shaft 19 is located between the connecting piece 16 and the insulating pull rod 21. One end of the opening tension spring 18 is fixed on the circuit breaker, and the other end is connected to the main crank arm 17 and is located between the crank arm shaft 19 and the connecting piece 16. The connecting rod 31 is movably inserted into the eddy current coil 32, the eddy current coil 32 is fixed on the circuit breaker, and is arranged opposite to the eddy current disk 33, and the eddy current disk 33 is connected to the connecting rod 31; the eddy current control device is connected to the eddy current coil 32, and is used to control the eddy current coil 32 to push the eddy current disk 33 to drive the connecting rod 31 to release the main crank arm 17, and the opening spring 18 drives the main crank arm 17 to pull the insulating pull rod 21 to open the switch. The eddy current control device includes a power supply 34, a capacitor 35 and a thyristor 36, and the capacitor 35 and the eddy current coil 32 are connected in parallel to the positive and negative poles of the power supply 34; the thyristor 36 is arranged between the positive pole and the eddy current coil 32, which can improve the opening time of the circuit breaker and shorten the opening time to 5-10ms.

[0012] Closing process: rotate the closing cam 11, the closing cam 11 pushes the closing crank arm 12 to rotate downward, the closing crank arm 12 drives the large crank arm 14 through the rotating shaft 13 to push the connecting piece 16 downward, the connecting piece 16 pushes the left end of the main crank arm 17, so that the left end of the main crank arm 17 rotates downward, and the right end of the main crank arm 17 rotates upward, the main crank arm 17 drives the insulating pull rod 21 to push the vacuum tube 22 upward, so that the moving contact moves upward, the moving and static contacts are closed, the vacuum circuit breaker is closed, and the opening tension spring 18 stores energy at the same time.

[0013] The opening process: the power supply 34 fully charges the capacitor 35, and then triggers the thyristor 36 to discharge the capacitor 35 to the eddy current coil 32. The eddy current generated by the eddy current coil 32 pushes the eddy current disk 33 to move backward, and the eddy current disk 33 drives the connecting rod 31 to move to the left. The large crank arm 14 and the connecting piece 16 both rotate to the left. The connecting rod 31 breaks the balance of the closing. The left end of the main crank arm 17 rotates upward under the pull of the opening spring 18, and then the right end of the main crank arm 17 moves downward. The main crank arm 17 drives the insulating pull rod 21 to move downward. The insulating pull rod 21 makes the moving contact of the vacuum tube 22 move downward quickly, and the moving and static contacts are separated, and the circuit breaker is opened.

[0014] The main crank arm 17 is quickly released by the eddy current coil 32 and the eddy current disk 33, thereby shortening the opening time.

[0015] 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. A spring energy storage circuit breaker eddy current repulsion tripping device, characterized in that: include: A closing cam (11) is arranged on the closing drive device; A closing crank arm (12), one end of which is rotatably mounted on the circuit breaker and is arranged opposite to the closing cam (11); A rotating shaft (13) rotatably disposed on the other end of the closing lever arm (12); A large crank arm (14), one end of which is disposed on the rotating shaft (13); A connecting shaft (15) is arranged at the other end of the large crank arm (14); A connecting piece (16), one end of which is rotatably mounted on the connecting shaft (15); A main crank arm (17) is rotatably mounted on the circuit breaker, one end of which is rotatably connected to the other end of the connecting piece (16), and the other end of which is connected to the insulating pull rod (21); A tripping tension spring (18), which is arranged on the circuit breaker and connected to one end of the main crank arm (17); A connecting rod (31), one end of which is rotatably mounted on the connecting shaft (15); An eddy current coil (32) is arranged on the circuit breaker, and the connecting rod (31) is movably inserted into the eddy current coil (32); An eddy current disk (33) is arranged opposite to the eddy current coil (32) and is connected to the eddy current coil (32); as well as An eddy current control device is connected to the eddy current coil (32) and is used to control the eddy current coil (32) to push the eddy current disk (33) to drive the connecting rod (31) to release the main crank arm (17), and the opening tension spring (18) drives the main crank arm (17) to pull the insulating pull rod (21) to open the switch.

2. A spring energy storage circuit breaker eddy current repulsion tripping device according to claim 1, characterized in that: The vortex control device comprises: A power source (34), the positive and negative electrodes of which are respectively connected to the eddy current coil (32); A capacitor (35) is disposed between the positive and negative electrodes of the power source (34); and The thyristor (36) is arranged between the positive electrode and the eddy current coil (32).

Images