High-voltage isolation switch redundant mechanism box of extra-high-voltage direct-current converter station

Abstract

The invention provides an extra-high voltage direct current converter station high-voltage isolation switch redundant mechanism case, which comprises a frame body, a first driving assembly, a second driving assembly and a transmission assembly, and is characterized in that the first driving assembly and the second driving assembly are detachably connected in the frame body; the transmission assembly comprises a driver, a first input shaft, a first clutch, a second input shaft, a second clutch and an output shaft, the driver is fixedly connected into the frame body, the first input shaft is connected to the driver and connected with the output end of the first driving assembly through the first clutch, and the second input shaft is connected to the driver and connected with the output end of the second driving assembly through the second clutch. The second input shaft is connected with the output end of the second driving assembly through the second clutch, the output shaft is connected to the driver, and the end, away from the driver, of the output shaft extends out of the frame body. When the first driving assembly is stuck, the second driving assembly timely replaces the first driving assembly to work, and it is guaranteed that the disconnecting switch can be smoothly switched on and switched off.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage isolating switches, and in particular to a redundant mechanism box for a high-voltage isolating switch in an ultra-high voltage direct current converter station. Background Art

[0002] Internationally, for AC transmission systems, the transmission voltage level of 35 to 220 kV is usually called high voltage, the transmission voltage level of 330 to 750 (765) kV is called extra-high voltage, and the transmission voltage level of 1000 kV and above is generally called ultra-high voltage. In addition, DC transmission systems with a voltage level of ±500 kV are generally called high voltage DC transmission systems.

[0003] At present, the UHV AC and DC high-voltage disconnectors operating in the power system are all equipped with one electric operating mechanism box for each disconnector. When the disconnector is opening or closing, the high-voltage disconnector cannot be operated due to failure of electrical components in the electric operating mechanism box or jamming of mechanical transmission components. It is necessary to check and replace the electrical components or replace the entire electric operating mechanism box, causing long-term and large-scale power outages in the power grid, resulting in large economic losses and adverse consequences.

[0004] In summary, there is an urgent need for a redundant mechanism box for high-voltage disconnectors in an ultra-high voltage direct current converter station to solve or at least partially solve the problems existing in the prior art. Summary of the invention

[0005] The present invention aims to provide a redundant mechanism box for high-voltage disconnectors in ultra-high voltage direct current converter stations, aiming to solve the problem in the prior art that the entire operating box cannot be opened or closed when the electric operating mechanism box is stuck. The specific technical solution is as follows:

[0006] A redundant mechanism box for a high-voltage disconnector of an ultra-high voltage direct current converter station comprises a frame, a first drive assembly, a second drive assembly and a transmission assembly. The first drive assembly and the second drive assembly are both detachably connected in the frame. The transmission assembly comprises a transmission, a first input shaft, a first clutch, a second input shaft, a second clutch and an output shaft. The transmission is fixedly connected in the frame. The first input shaft is connected to the transmission. The first input shaft is connected to the output end of the first drive assembly through a first clutch. The second input shaft is connected to the transmission. The second input shaft is connected to the output end of the second drive assembly through a second clutch. The output shaft is connected to the transmission, and one end of the output shaft away from the transmission extends out of the frame.

[0007] Preferably, the first clutch and the second clutch are both electromagnetic couplings.

[0008] Furthermore, it also includes a main control travel switch, which includes a third signal switch and a third shift block. The third shift block is detachably connected to the output shaft. Two third signal switches are arranged. The two third signal switches are fixedly connected to the transmission, and the two third signal switches are respectively located on both sides of the third shift block.

[0009] Furthermore, it also includes a first travel switch and a second travel switch, the first travel switch includes a first signal switch and a first shift block, the first shift block is detachably connected to the output end of the first drive component, two first signal switches are arranged, the two first signal switches are fixedly connected to the frame, and the two first signal switches are respectively located on both sides of the first shift block; the second travel switch includes a second signal switch and a second shift block, the second shift block is detachably connected to the output end of the second drive component, two second signal switches are arranged, the two second signal switches are fixedly connected to the frame, and the two second signal switches are respectively located on both sides of the second shift block.

[0010] Preferably, the first driving assembly includes a first power source and a first reducer, the first reducer is detachably connected to the frame, the input end of the first reducer is connected to the output end of the first power source, and the output end of the first reducer is connected to the first clutch.

[0011] Preferably, the second drive assembly includes a second power source and a second reducer, the second reducer is detachably connected to the frame, the input end of the second reducer is connected to the output end of the second power source, and the output end of the second reducer is connected to the second clutch.

[0012] Preferably, the transmission includes a housing, a first driving gear, a second driving gear and a driven gear, the housing is fixedly connected to the frame, the first driving gear, the second driving gear and the driven gear are all rotatably connected in the housing, the first driving gear is meshed with the driven gear, the second driving gear is meshed with the driven gear, the first driving gear is coaxially fixedly connected to the first input shaft, the second driving gear is coaxially fixedly connected to the second input shaft, and the driven gear is coaxially fixedly connected to the output shaft.

[0013] Preferably, the diameters of the first driving gear and the second driving gear are equal, and the diameter of the first driving gear is smaller than the diameter of the driven gear.

[0014] Preferably, a clamp is provided at one end of the output shaft away from the transmission, and the clamp is detachably connected to the output shaft.

[0015] The application of the technical solution of the present invention has the following beneficial effects:

[0016] Through the arrangement of the redundant mechanism box, under normal use, the first clutch is in the engaged state and the second clutch is in the disengaged state. When working, the power is transmitted from the first drive component to the first input shaft of the transmission component through the first clutch, and is transmitted to the output shaft through the transmission device, and drives the external joystick to operate, thereby realizing the closing or opening operation of the disconnector. When the first drive component fails, the first clutch is disconnected and the second clutch is connected. The power is transmitted from the second drive component to the second input shaft of the transmission component through the second clutch, and is transmitted to the output shaft through the transmission device, thereby realizing the closing or opening operation of the disconnector. This ensures that when the first drive component fails, timely control can be performed through the second drive component, so that the power grid can resume operation in a short time. Compared with the method that requires operators to go to the site for operation, it greatly saves processing time and reduces the failure rate of the power grid.

[0017] In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. Figure 1 , the present invention is further described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 The present invention is a schematic diagram of the overall structure of a redundant mechanism box of a high-voltage disconnector in an ultra-high voltage direct current converter station.

[0020] Among them, 1. frame; 2. first drive component; 21. first power source; 22. first reducer; 3. second drive component; 31. second power source; 32. second reducer; 4. transmission component; 41. transmission; 411. housing; 412. first driving gear; 413. second driving gear; 414. driven gear; 42. first input shaft; 43. first clutch; 44. second input shaft; 45. second clutch; 46. output shaft; 5. main control travel switch; 51. third signal switch; 52. third shift block; 6. first travel switch; 61. first signal switch; 62. first shift block; 7. second travel switch; 71. second signal switch; 72. second shift block; 8. clamp. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more fully below, and preferred embodiments of the present invention are provided. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0023] Example:

[0024] See also Figure 1 The present embodiment provides a redundant mechanism box of a high-voltage disconnector of an ultra-high voltage direct current converter station, comprising a frame 1, a first drive assembly 2, a second drive assembly 3 and a transmission assembly 4, wherein the first drive assembly 2 and the second drive assembly 3 are both detachably connected to the frame 1, and the transmission assembly 4 comprises a transmission 41, a first input shaft 42, a first clutch 43, a second input shaft 44, a second clutch 45 and an output shaft 46, wherein the transmission 41 is fixedly connected to the frame 1, the first input shaft 42 is connected to the transmission 41, the first input shaft 42 is connected to the output end of the first drive assembly 2 through the first clutch 43, the second input shaft 44 is connected to the transmission 41, the second input shaft 44 is connected to the output end of the second drive assembly 3 through the second clutch 45, the output shaft 46 is connected to the transmission 41, and the end of the output shaft 46 away from the transmission 41 extends out of the frame 1.

[0025] It should be noted that the existing conventional arrangement is to directly drive the knife switch operating lever that needs to be operated to move through the drive component. Generally, the drive component adopts the structure of a motor acceleration and deceleration device. In such a structure, when the motor or the deceleration device fails, the motor or the deceleration device needs to be replaced in time. During the replacement process, the motor or the deceleration device cannot be remotely controlled to close or open the switch, and the operator needs to rush to the site to perform manual operation, which delays the normal operation of the power grid.

[0026] Specifically, the output shaft 46 is connected to the operating lever of the external disconnector, and the operating lever is driven to rotate by the rotation of the output shaft 46, thereby driving the knife switch of the disconnector to perform closing or opening operations.

[0027] It can be understood that, through the arrangement of the redundant mechanism box, under normal use, the first clutch 43 is in an engaged state, and the second clutch 45 is in a disconnected state. When working, the power is transmitted from the first drive assembly 2 to the first input shaft 42 of the transmission assembly 4 through the first clutch 43, and is transmitted to the output shaft 46 through the transmission device 41 for output, and drives the external joystick to act, thereby realizing the closing or opening operation of the disconnector. When the first drive assembly 2 fails, the first clutch 43 is disconnected, and the second clutch 45 is connected. The power is transmitted from the second drive assembly 3 to the second input shaft 44 of the transmission assembly 4 through the second clutch 45, and is transmitted to the output shaft 46 through the transmission device 41 for output, thereby realizing the closing or opening operation of the disconnector. Thereby, it is ensured that when the first drive assembly 2 fails, timely control can be performed through the second drive assembly 3, so that the power grid can be restored to operation in a short time. Compared with the method that requires operators to go to the site for operation, it greatly saves processing time and reduces the failure rate of the power grid.

[0028] It should be noted that the first clutch 43 and the second clutch 45 are both electrically controlled, that is, a control circuit is arranged in the frame 1 (not shown in the drawings), and the first clutch 43 and the second clutch 45 are electrically connected to the control circuit (the electrical connection can be through a wire; it can also be connected through the transmission and reception of electromagnetic wave signals, that is, the first clutch 43 and the second clutch 45 transmit electromagnetic wave signals through an electromagnetic transmitter, and the control circuit receives the electromagnetic wave signals through an electromagnetic receiver. In addition, the control circuit also transmits electromagnetic wave signals through another electromagnetic transmitter, and the first clutch 43 and the second clutch 45 receive electromagnetic wave signals through another electromagnetic receiver). The connection or disconnection of the first clutch 43 and the second clutch 45 can be automatically controlled by the control circuit; the first drive component 2 and the second drive component 3 are both electrically connected to the control circuit.

[0029] Preferably, the first clutch 43 and the second clutch 45 are both electromagnetic couplings.

[0030] It can be understood that the on / off of the first clutch 43 or the on / off of the second clutch 45 can be conveniently controlled by using an electromagnetic coupling. When the first clutch 43 needs to be connected, it is only necessary to energize and engage the first clutch 43, which is convenient for control.

[0031] Furthermore, it also includes a main control travel switch 5, which includes a third signal switch 51 and a third shift block 52. The third shift block 52 is detachably connected to the output shaft 46. Two third signal switches 51 are arranged. The two third signal switches 51 are fixedly connected to the transmission 41 by bolts, and the two third signal switches 51 are respectively located on both sides of the third shift block 52.

[0032] Specifically, the third shift block 52 is detachably connected to the output shaft 46 by bolts. When the output shaft 46 rotates, the third shift block 52 is driven to rotate together. When the third shift block 52 rotates, it can respectively drive two third signal switches 51 to operate, one of which corresponds to the closing of the external isolating switch, and the other third signal switch 51 corresponds to the wind gate of the external isolating switch. It can be understood that when it is necessary to control the external isolating switch to perform a closing operation, the output shaft 46 drives the third shift block 52 to rotate to contact the third signal switch 51 corresponding to the closing operation, and drives the third signal switch 51 to operate, and the third signal switch 51 sends a control signal to the control circuit, and the control circuit cuts off the power of the first drive component 2 in response to the signal sent by the third signal switch 51, and completes the closing operation; when it is necessary to control the external isolating switch to perform an opening operation, the output shaft 46 drives the third shift block 52 to rotate in the opposite direction to contact the third signal switch 51 corresponding to the opening operation, and drives the third signal switch 51 to operate, and the third signal switch 51 sends a control signal to the control circuit, and the control circuit cuts off the power of the first drive component 2 in response to the signal sent by the third signal switch 51, and completes the opening operation. It should be noted that the third signal switch 51 is a micro-press switch, and in some other embodiments, the third signal switch 51 can also be a proximity switch.

[0033] Furthermore, it also includes a first travel switch 6 and a second travel switch 7. The first travel switch 6 includes a first signal switch 61 and a first selector block 62. The first selector block 62 is detachably connected to the output end of the first drive component 2. Two first signal switches 61 are arranged. The two first signal switches 61 are fixedly connected to the frame 1, and the two first signal switches 61 are respectively located on both sides of the first selector block 62; the second travel switch 7 includes a second signal switch 71 and a second selector block 72. The second selector block 72 is detachably connected to the output end of the second drive component 3. Two second signal switches 71 are arranged. The two second signal switches 71 are fixedly connected to the frame 1, and the two second signal switches 71 are respectively located on both sides of the second selector block 72.

[0034] Specifically, the first travel switch 6 and the second travel switch 7 are both electrically connected to the control circuit, and the structures of the first travel switch 6 and the second travel switch 7 are basically the same as the structure of the main control travel switch 5, but the functions are different. The first travel switch 6 and the second travel switch 7 play a redundant control role. When the main control travel switch 5 is damaged, the first travel switch 6 participates in the control to enable the first drive assembly 2 to start and stop smoothly, and prevents the first drive assembly 2 from malfunctioning when losing the control function of the main control travel switch 5, causing the output shaft 46 to rotate too much and damage the external disconnector. In addition, a fault signal is sent to the control circuit to prompt the operator to repair it as soon as possible. In addition, the first travel switch 6 also monitors the first drive assembly 2. When the first travel switch 6 cannot reach the predetermined position, the control circuit can be used to determine that the first drive assembly 2 is stuck or damaged. At this time, the control circuit controls the first clutch 43 to be disconnected, and the second clutch 45 is controlled to be connected and the second drive assembly 3 to work, ensuring the smooth opening or closing action, and sending a fault signal to the control circuit. The structural form of the first signal switch 61 and the second signal switch 71 is the same as the structural form of the third signal switch 51, which will not be repeated here.

[0035] Preferably, the first drive assembly 2 includes a first power source 21 and a first reducer 22, the first reducer 22 is detachably connected to the frame 1, the input end of the first reducer 22 is connected to the output end of the first power source 21, and the output end of the first reducer 22 is connected to the first clutch 43. The second drive assembly 3 includes a second power source 31 and a second reducer 32, the second reducer 32 is detachably connected to the frame 1, the input end of the second reducer 32 is connected to the output end of the second power source 31, and the output end of the second reducer 32 is connected to the second clutch 45.

[0036] Specifically, the first power source 21 is a motor, the first reducer 22 is arranged horizontally in the frame 1, the first power source 21 is connected to the input end of the first reducer 22 through a bevel gear, so that the first power source 21 and the first reducer 22 are arranged vertically, the second power source 31 is also a motor, the second reducer 32 is arranged horizontally in the frame 1, and the second reducer 32 is arranged symmetrically with the first reducer 22, the second power source 31 is connected to the input end of the second reducer 32 through a bevel gear, so that the second power source 31 and the second reducer 32 are arranged vertically. It should be noted that if the first power source 21 and the first reducer 22 are arranged in series in a horizontal direction, it will cause a large position to be occupied horizontally, making the entire device into a long strip. After the position of the first power source 21 relative to the first reducer 22 is changed by the bevel gear, the horizontal and vertical positions are occupied partially, making the entire mechanism more compact, and the frame 1 can be made smaller, which is convenient for application in some places with smaller spaces. Secondly, when the frame 1 is smaller, more production materials can be saved, which is conducive to reducing production costs.

[0037] Preferably, the transmission device 41 includes a housing 411, a first driving gear 412, a second driving gear 413 and a driven gear 414. The housing 411 is fixedly connected to the frame 1 by bolts. Of course, in some other embodiments, the housing 411 can also be fixed to the frame 1 by welding or riveting. Bearings are installed at both ends of the first driving gear 412 and the second driving gear 413. The first driving gear 412, the second driving gear 413 and the driven gear 414 are rotatably connected to the housing 411 through multiple bearings. The first driving gear 412 is meshed with the driven gear 414, the second driving gear 413 is meshed with the driven gear 414, the first driving gear 412 is coaxially fixedly connected to the first input shaft 42, the second driving gear 413 is coaxially fixedly connected to the second input shaft 44, and the driven gear 414 is coaxially fixedly connected to the output shaft 46. The third signal switch 51 is fixedly connected to the housing 411.

[0038] It can be understood that when power is input from the first input shaft 42, the first driving gear 412 drives the driven gear 414 to rotate, and then drives the output shaft 46 to rotate, so that the power is smoothly output from the output shaft 46; when power is input from the second input shaft 44, the second driving gear 413 drives the driven gear 414 to rotate, and then drives the output shaft 46 to rotate, so that the power is smoothly output from the output shaft 46. Through such an arrangement, when power is input from either the first input shaft 42 or the second input shaft 44, the driven gear 414 can be driven to rotate, so that the power is output from the output shaft 46.

[0039] Preferably, the diameters of the first driving gear 412 and the second driving gear 413 are equal, and the diameter of the first driving gear 412 is smaller than the diameter of the driven gear 414 .

[0040] It can be understood that when the small gear drives the large gear to rotate, the speed slows down and the torque increases, so that when the power is transmitted from the first driving gear 412 to the driven gear 414 or the power is transmitted from the second driving gear 413 to the driven gear 414, the rotational torque increases and the speed slows down, so that the torque output from the output shaft 46 is larger and smoother, so that the opening or closing of the switch can be carried out smoothly.

[0041] Preferably, a clamp 8 is provided at one end of the output shaft 46 away from the transmission device 41 , and the clamp 8 is detachably connected to the output shaft 46 .

[0042] Specifically, the output shaft 46 is arranged in a hexagonal column shape at one end close to the clamp 8. The clamp 8 includes a first clamp, a second clamp and a fastening bolt. A hexagonal column-shaped through hole is enclosed between the first clamp and the second clamp. The first clamp and the second clamp are clamped on the output shaft 46 by the fastening bolt, so that the output shaft 46 is limited in the hexagonal column-shaped through hole. In addition, the output shaft 46 is connected to the operating rod of the external knife switch through the hexagonal column-shaped through hole. When the output shaft 46 rotates, the torque is transmitted to the operating rod of the external knife switch through the clamp 8, thereby driving the knife switch to open or close the switch. During the manufacturing and installation process, there will be an error in the spacing between the mechanism box and the knife switch operating rod, and the clamp 8 can be adjusted relative to the axial direction of the output shaft 46. When the spacing between the output shaft 46 and the knife switch operating rod is far, the clamp 8 can be moved toward the knife switch operating rod, thereby compensating for the error caused during the manufacturing and installation process, so that the output shaft 46 can be smoothly docked with the knife switch operating rod through the clamp 8.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A redundant mechanism box for high-voltage disconnectors in an ultra-high voltage direct current converter station, characterized in that: include A frame (1), a first drive assembly (2), a second drive assembly (3) and a transmission assembly (4), The first drive assembly (2) and the second drive assembly (3) are both detachably connected to the frame (1). The transmission assembly (4) comprises a transmission (41), a first input shaft (42), a first clutch (43), a second input shaft (44), a second clutch (45) and an output shaft (46); the transmission (41) is fixedly connected in the frame (1). The first input shaft (42) is connected to the transmission (41), and the first input shaft (42) is connected to the output end of the first drive component (2) through a first clutch (43). The second input shaft (44) is connected to the transmission (41), and the second input shaft (44) is connected to the output end of the second drive assembly (3) through a second clutch (45). The output shaft (46) is connected to the transmission device (41), and one end of the output shaft (46) away from the transmission device (41) protrudes from the frame body (1).

2. A redundant mechanism box for high-voltage disconnectors in a UHV DC converter station according to claim 1, characterized in that: The first clutch (43) and the second clutch (45) are both electromagnetic couplings.

3. The redundant mechanism box of high-voltage disconnector of UHV DC converter station according to claim 1, characterized in that: The invention also comprises a main control travel switch (5), wherein the main control travel switch (5) comprises a third signal switch (51) and a third shift block (52), wherein the third shift block (52) is detachably connected to the output shaft (46), and two third signal switches (51) are arranged, and the two third signal switches (51) are both fixedly connected to the transmission (41), and the two third signal switches (51) are respectively located on both sides of the third shift block (52).

4. A redundant mechanism box for high-voltage disconnectors in a UHV DC converter station according to claim 3, characterized in that: It also includes a first travel switch (6) and a second travel switch (7), The first travel switch (6) comprises a first signal switch (61) and a first shift block (62); the first shift block (62) is detachably connected to the output end of the first drive assembly (2); two first signal switches (61) are arranged; the two first signal switches (61) are both fixedly connected to the frame (1), and the two first signal switches (61) are respectively located on both sides of the first shift block (62); The second travel switch (7) comprises a second signal switch (71) and a second shift block (72); the second shift block (72) is detachably connected to the output end of the second drive assembly (3); two second signal switches (71) are arranged; the two second signal switches (71) are both fixedly connected to the frame (1), and the two second signal switches (71) are respectively located on both sides of the second shift block (72).

5. The redundant mechanism box of high-voltage disconnector of UHV DC converter station according to claim 1, characterized in that: The first driving assembly (2) comprises a first power source (21) and a first reducer (22); the first reducer (22) is detachably connected to the frame (1); the input end of the first reducer (22) is connected to the output end of the first power source (21); and the output end of the first reducer (22) is connected to the first clutch (43).

6. A redundant mechanism box for high-voltage disconnectors in an ultra-high voltage direct current converter station according to claim 5, characterized in that: The second driving assembly (3) comprises a second power source (31) and a second reducer (32); the second reducer (32) is detachably connected to the frame (1); the input end of the second reducer (32) is connected to the output end of the second power source (31); and the output end of the second reducer (32) is connected to the second clutch (45).

7. A redundant mechanism box for high-voltage disconnectors in a UHV DC converter station according to any one of claims 1 to 6, characterized in that: The transmission (41) comprises a housing (411), a first driving gear (412), a second driving gear (413) and a driven gear (414); the housing (411) is fixedly connected to the frame (1); the first driving gear (412), the second driving gear (413) and the driven gear (414) are all rotatably connected to the housing (411); the first driving gear (412) is meshed with the driven gear (414); the second driving gear (413) is meshed with the driven gear (414); the first driving gear (412) is coaxially fixedly connected to the first input shaft (42); the second driving gear (413) is coaxially fixedly connected to the second input shaft (44); and the driven gear (414) is coaxially fixedly connected to the output shaft (46).

8. The redundant mechanism box of high-voltage disconnector of UHV DC converter station according to claim 7, characterized in that: The diameters of the first driving gear (412) and the second driving gear (413) are equal, and the diameter of the first driving gear (412) is smaller than the diameter of the driven gear (414).

9. A redundant mechanism box for high-voltage disconnectors in a UHV DC converter station according to any one of claims 1 to 6, characterized in that: A clamp (8) is provided at one end of the output shaft (46) away from the transmission device (41), and the clamp (8) is detachably connected to the output shaft (46).

Images