A special operating mechanism for GIS disconnector

Abstract

The present invention relates to the technical field of GIS disconnectors, and more specifically, to a dedicated operating mechanism for GIS disconnectors. The dedicated operating mechanism for a GIS disconnector comprises an output shaft, characterized in that one end of the output shaft is connected to one end of a spring drive device, the other end of the spring drive device is connected to a sliding groove via a connecting shaft, and a transmission structure is connected to the shaft on the other side of the output shaft. A shift fork is sleeved on the shaft, and the other end of the shift fork is provided with a groove. The groove contains one end of a connecting rod, and the other end of the connecting rod is connected to an electric drive device. Compared with existing technologies, this mechanism has high reliability, combining the advantages of both electric and spring mechanisms while avoiding their respective disadvantages. Furthermore, it has a compact structure and small size, which reduces the overall cost of the GIS.

Description

Technical Field

[0001] The present invention relates to the technical field of GIS disconnect switches, in particular to a special operating mechanism for GIS disconnect switches. Background Art

[0002] Although disconnectors are not capable of switching load or short-circuit currents, they are required in some special situations to switch currents with extremely low voltage differences, such as busbar transfer currents. This voltage difference can cause arcing between the switch contacts. When an electric operating mechanism is used to open the switch contacts, arcing occurs. Due to the low speed and slow operation of the contacts, the arcing time is long, which can cause unacceptable damage to the contacts. In practice, to overcome this problem, spring mechanisms are often used to operate the disconnector contacts. Spring mechanisms offer high speed and fast operation, resulting in a shorter arcing time and minimal burn damage to the contacts. However, spring mechanisms are subject to significant vibration, impact, and noise during operation, which can lead to adverse effects. Vibration can cause malfunction of electrical components, requiring higher mechanical strength for the entire transmission circuit. Some components are easily damaged by impact, resulting in lower operating reliability than electric mechanisms. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, the present invention provides a dedicated operating mechanism for GIS disconnectors. During the entire contact closing and opening travel of the switch, only the short distance immediately after contact separation is driven by a spring mechanism, achieving a higher speed to extinguish the arc quickly. The remaining travel is driven by a motor-driven mechanism, minimizing the side effects of the spring mechanism. This mechanism combines the advantages of both motor-driven and spring mechanisms while avoiding their respective disadvantages.

[0004] To achieve the above purpose, a special operating mechanism for a GIS disconnector is designed, comprising an output shaft, characterized in that one side of the output shaft is connected to one end of a spring drive device, the other end of the spring drive device is connected to a sliding groove via a connecting shaft, a transmission structure is connected to the shaft on the other side of the output shaft, one end of a shift fork is sleeved on the shaft, the other end of the shift fork is provided with a groove, one end of a connecting rod is provided in the groove, and the other end of the connecting rod is connected to the electric drive device.

[0005] The width of the groove is greater than the diameter of the connecting rod.

[0006] The spring driving device includes a spring, a first rod seat, a guide rod, and a second rod seat. One end of a crank arm is sleeved on the front side of the output shaft, the other end of the crank arm is connected to one end of the first rod seat, the other end of the first rod seat is connected to one end of the guide rod, the other end of the guide rod is connected to one end of the second rod seat, and the other end of the second rod seat is connected to the sliding groove through a connecting shaft. A spring is provided on the outside of the guide rod.

[0007] One end of the spring is connected to the first rod seat, and the other end of the spring is connected to the second rod seat.

[0008] The sliding groove is located on the fixing member in the operating mechanism.

[0009] The transmission structure includes a first gear and a second gear. The first gear is sleeved on the rear side of the output shaft, a second gear meshing with the first gear is arranged above the first gear, and a shaft is arranged at the center of the second gear.

[0010] The electric drive device includes a motor, a gear set, a screw rod, and a nut. The other end of the connecting rod is connected to the nut, and the nut is sleeved on one end of the screw rod. The other end of the screw rod is connected to the motor through the gear set. One end of the screw rod is provided with a thread, and the structure of the thread matches the structure of the nut.

[0011] The nut and the connecting rod are an integrated structure.

[0012] The number of the shift forks, connecting rods and electric drive devices is two, and the two shift forks, connecting rods and electric drive devices are all arranged symmetrically on the left and right.

[0013] The method of using the spring drive device and the electric drive device to drive the output shaft to close or open the switch specifically includes the following steps:

[0014] S1, closing: The motor rotates, driving the connecting rod to move linearly along the thread. The connecting rod pushes the shift fork to rotate, which drives the output shaft to rotate. The output shaft drives the contacts to complete the closing. At the same time, the spring is compressed to complete energy storage and remains compressed after passing the dead point.

[0015] S2, opening: the motor rotates in the opposite direction, the connecting rod moves in the opposite direction to push the shift fork, driving the output shaft to rotate in the opposite direction, thereby driving the spring to release after passing the dead point. The released spring pushes the output shaft to rotate rapidly, thereby driving the contacts to open quickly. After the spring is released, the motor continues to rotate in the opposite direction, driving the connecting rod to move in the opposite direction along the thread. The connecting rod pushes the shift fork to rotate, and the shift fork drives the output shaft to rotate in the opposite direction, thereby driving the contacts to complete the remaining opening stroke.

[0016] Compared with the existing technology, the present invention has high reliability, combines the advantages of the electric mechanism and the spring mechanism while avoiding their respective disadvantages. It also has a compact structure and small size, which reduces the overall cost of GIS. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of embodiment 1 of the present invention.

[0018] Figure 2 This is a structural diagram of embodiment 2 of the present invention.

[0019] See also Figures 1 to 2, where 1 is the output shaft, 2 is the spring, 3 is the first rod seat, 4 is the guide rod, 5 is the second rod seat, 6 is the connecting shaft, 7 is the sliding groove, 8 is the motor, 9 is the gear set, 10 is the screw rod, 11 is the nut, 12 is the connecting rod, 13 is the shift fork, 14 is the first gear, 15 is the second gear, 16 is the shaft, 17 is the groove, and 18 is the thread. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Example 1:

[0022] like Figure 1 As shown, one side of the output shaft 1 is connected to one end of the spring driving device, and the other end of the spring driving device is connected to the sliding groove 7 through the connecting shaft 6. The other side of the output shaft 1 is connected to the shaft 16 through the transmission structure. One end of the fork 13 is sleeved on the shaft 16, and the other end of the fork 13 is provided with a groove 17. One end of the connecting rod 12 is provided in the groove 17, and the other end of the connecting rod 12 is connected to the electric driving device.

[0023] The width of the groove 17 is greater than the diameter of the connecting rod 12 .

[0024] The spring drive device includes a spring 2, a first rod seat 3, a guide rod 4, and a second rod seat 5. The front side of the output shaft 1 is sleeved with one end of a crank arm 19, the other end of the crank arm 19 is connected to one end of the first rod seat 3, the other end of the first rod seat 3 is connected to one end of the guide rod 4, the other end of the guide rod 4 is connected to one end of the second rod seat 5, and the other end of the second rod seat 5 is connected to the sliding groove 7 through the connecting shaft 6. A spring 2 is provided on the outside of the guide rod 4.

[0025] One end of the spring 2 is connected to the first rod seat 3 , and the other end of the spring 2 is connected to the second rod seat 5 .

[0026] The sliding groove 7 is located on a fixed part in the operating mechanism.

[0027] The transmission structure includes a first gear 14 and a second gear 15 . The first gear 14 is sleeved on the rear side of the output shaft 1 . A second gear 15 meshing with the first gear 14 is provided above the first gear 14 . A shaft 16 is provided at the center of the second gear 15 .

[0028] The electric drive device includes a motor 8, a gear set 9, a screw rod 10, and a nut 11. The other end of the connecting rod 12 is connected to the nut 11. The nut 11 is sleeved on one end of the screw rod 10. The other end of the screw rod 10 is connected to the motor 8 through the gear set 9. One end of the screw rod 10 is provided with a thread 18, and the structure of the thread 18 matches the structure of the nut 11.

[0029] The nut 11 and the connecting rod 12 are an integrated structure.

[0030] The connecting rod 12 has a cylindrical structure.

[0031] The guide rod 4 is a telescopic rod with a telescopic function to ensure that the spring 2 can be compressed and released.

[0032] The sliding groove 7 is located on any fixed component in the housing of the operating mechanism of the present invention.

[0033] The output shaft 1 is rigidly connected to the first rod seat 3 via the crank arm 19 to ensure that the spring 2 can push the output shaft 1 to rotate.

[0034] The second rod seat 5 slides up and down along a straight line through the sliding slot 7 to ensure that the spring 2 can follow in a free state within the pushing stroke section of the motor 8 without generating additional torque.

[0035] In this embodiment, the number of the electric drive device is one.

[0036] The method of driving the output shaft 1 to close or open by the spring drive device and the electric drive device specifically includes the following steps:

[0037] S1, closing: Motor 8 rotates, and through gear set 9 drives screw 10 to rotate, thereby driving nut 11 and connecting rod 12 to move linearly along thread 18. Connecting rod 12 pushes shift fork 13 to rotate about axis 16. Shift fork 13 drives output shaft 1 to rotate through second gear 15 and first gear 14. Output shaft 1 drives contacts to close the circuit breaker. At the same time, spring 2 is compressed to store energy and remains compressed after passing dead center.

[0038] S2, opening: the motor 8 rotates in the opposite direction, the connecting rod 12 moves in the opposite direction to push the shift fork 13, and drives the output shaft 1 to rotate in the opposite direction, thereby driving the spring 2 to release after passing the dead point. The released spring 2 pushes the output shaft 1 to rotate rapidly, thereby driving the contacts to open quickly. After the spring 2 is released, the motor 8 continues to rotate in the opposite direction, and drives the nut 11 and the connecting rod 12 to move linearly along the thread 18 through the gear set 9 and the screw rod 10. The connecting rod 12 pushes the shift fork 13 to rotate in the opposite direction around the shaft 16, driving the output shaft 1 to rotate in the opposite direction, thereby driving the contacts to complete the remaining opening stroke.

[0039] During the rapid opening process in step S2, when spring 2 drives output shaft 1 to rotate rapidly, the speed of spring 2 is faster than the pulling speed of motor 8. Therefore, in the same direction of movement, the rotation speed of shift fork 13 will temporarily be faster than the speed of nut 11 and connecting rod 12. At this time, the width of groove 17, which is larger than the diameter of connecting rod 12, acts as a clearance, preventing the rapid rotation of shift fork 13 from interfering with nut 11 and connecting rod 12.

[0040] Example 2:

[0041] This example only describes the differences from Example 1, and the same parts as Example 1 will not be repeated.

[0042] like Figure 2 As shown, two shift forks 13, connecting rods 12 and electric drive devices are respectively provided on the left and right sides above the output shaft 1, and the two shift forks 13, connecting rods 12 and electric drive devices are all arranged symmetrically on the left and right.

[0043] When both an isolating switch and an earthing switch are installed within a GIS, the two shift forks 13, connecting rod 12, and electric drive mechanism of this embodiment can be used to operate the isolating switch and the earthing switch, respectively. To close or open the isolating switch or the earthing switch, the shift fork 13, connecting rod 12, electric drive mechanism, and spring drive mechanism on one side can be actuated to complete the closing or opening operation using the method described in Example 1.

[0044] The present invention features a compact structure and small size, reducing the overall cost of GIS. During the entire contact closing and opening stroke, only the short distance immediately after contact separation is driven by the spring drive, achieving a high speed to extinguish the arc quickly. The remaining travel is driven by the electric drive, minimizing the side effects of the spring drive. This combines the advantages of both electric and spring drives while avoiding their respective disadvantages, resulting in high reliability.

Claims

1. A special operating mechanism for a GIS disconnector, comprising an output shaft, characterized in that: One side of the output shaft (1) is connected to one end of the spring drive device, and the other end of the spring drive device is connected to the sliding groove (7) through the connecting shaft (6). The other side of the output shaft (1) is connected to the shaft (16) through the transmission structure. One end of the shift fork (13) is sleeved on the shaft (16), and the other end of the shift fork (13) is provided with a groove (17). One end of the connecting rod (12) is provided in the groove (17), and the other end of the connecting rod (12) is connected to the electric drive device; the spring drive device includes a spring (2), a first rod seat (3), a guide rod (4), and a second rod seat (5). The front side of the output shaft (1) is sleeved with a crank arm (19 ) one end, the other end of the crank arm (19) is connected to one end of the first rod seat (3), the other end of the first rod seat (3) is connected to one end of the guide rod (4), the other end of the guide rod (4) is connected to one end of the second rod seat (5), the other end of the second rod seat (5) is connected to the sliding groove (7) through the connecting shaft (6), and a spring (2) is provided on the outside of the guide rod (4); the transmission structure includes a first gear (14) and a second gear (15), the first gear (14) is sleeved on the rear side of the output shaft (1), a second gear (15) is provided above the first gear (14) and meshed with the first gear (15), and a shaft (16) is provided at the center of the second gear (15).

2. A special operating mechanism for a GIS disconnector according to claim 1, characterized in that: The width of the groove (17) is greater than the diameter of the connecting rod (12).

3. The special operating mechanism for GIS disconnector according to claim 1, characterized in that: One end of the spring (2) is connected to the first rod seat (3), and the other end of the spring (2) is connected to the second rod seat (5).

4. The special operating mechanism for GIS disconnector according to claim 1, characterized in that: The sliding groove (7) is located on a fixed part in the operating mechanism.

5. The special operating mechanism for GIS disconnector according to claim 1, characterized in that: The electric drive device comprises a motor (8), a gear set (9), a screw rod (10), and a nut (11). The other end of the connecting rod (12) is connected to the nut (11). The nut (11) is sleeved on one end of the screw rod (10). The other end of the screw rod (10) is connected to the motor (8) through the gear set (9). One end of the screw rod (10) is provided with a thread (18). The structure of the thread (18) matches the structure of the nut (11).

6. The special operating mechanism for GIS disconnector according to claim 5, characterized in that: The nut (11) and the connecting rod (12) are an integrated structure.

7. The special operating mechanism for GIS disconnector according to claim 1, characterized in that: The number of the shift fork (13), the connecting rod (12) and the electric drive device is two, and the two shift forks (13), the connecting rod (12) and the electric drive devices are arranged symmetrically on the left and right.

8. The special operating mechanism for GIS disconnector according to claim 1, characterized in that: The method of the spring drive device and the electric drive device driving the output shaft (1) to close and open the switch specifically comprises the following steps: S1, closing: the motor (8) rotates, driving the connecting rod (12) to move linearly along the thread (18), the connecting rod (12) pushes the shift fork (13) to rotate, the shift fork (13) drives the output shaft (1) to rotate, the output shaft (1) drives the contacts to complete the closing, and at the same time the spring (2) is compressed to complete the energy storage, and remains in a compressed state after passing the dead point; S2, opening: the motor (8) rotates in the reverse direction, the connecting rod (12) moves in the reverse direction to push the shift fork (13), driving the output shaft (1) to rotate in the reverse direction, thereby driving the spring (2) to release past the dead point, and the released spring (2) pushes the output shaft (1) to rotate rapidly, thereby driving the contacts to open quickly. After the spring (2) is released, the motor (8) continues to rotate in the reverse direction, driving the connecting rod (12) to move in the reverse direction along the thread (18), the connecting rod (12) pushes the shift fork (13) to rotate, and the shift fork (13) drives the output shaft (1) to rotate in the reverse direction, thereby driving the contacts to complete the remaining opening stroke.

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