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

Abstract

The utility model provides a redundant mechanism case for a high-voltage isolating switch of an extra-high-voltage direct-current converter station, 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 utility model relates to high voltage isolator technical field, concretely relates to a kind of redundancy mechanism box of high voltage isolator of extra-high voltage direct current converter station. BACKGROUND

[0002] In the world, for AC transmission system, usually 35~220kV transmission voltage level is called high voltage, 330~750 (765) kV transmission voltage level is called super high voltage, and 1000kV and above transmission voltage level is commonly called as extra-high voltage. In addition, generally ±500kV voltage level DC transmission system is called high voltage DC transmission system.

[0003] At present, the extra-high voltage AC and DC high voltage isolator operated in power system is 1 high voltage isolator corresponding to 1 electric operating mechanism box, when isolator is operated, due to electric operating mechanism box internal electric element failure or mechanical transmission component jam, leading to high voltage isolator cannot be operated, electric element needs to be checked and replaced or whole electric operating mechanism box is replaced, causing power grid long time, large area power failure and other accidents, causing great economic loss and bad consequences.

[0004] In summary, extra-high voltage DC converter station high voltage isolator redundancy mechanism box is urgently needed to solve or at least partially solve the problems in the prior art. INVENTION CONTENTS

[0005] The utility model aims at providing a kind of extra-high voltage DC converter station high voltage isolator redundancy mechanism box, to solve the problem that the whole operating box cannot be realized when electric operating mechanism box exists jam in prior art, and the specific technical scheme is as follows:

[0006] A kind of extra-high voltage DC converter station high voltage isolator redundancy mechanism box, including frame body, first drive component, second drive component and transmission component, first drive component and second drive component are detachably connected in frame body, transmission component includes transmission, first input shaft, first clutch, second input shaft, second clutch and output shaft, transmission is fixedly connected in frame body, first input shaft is connected on transmission, first input shaft is connected with the output end of first drive component by first clutch, second input shaft is connected on transmission, second input shaft is connected with the output end of second drive component by second clutch, output shaft is connected on transmission, and the end of output shaft away from transmission extends from frame body.

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

[0008] Further, the main stroke switch further comprises a third signal switch and a third dial block, the third dial block is detachably connected to the output shaft, and the third signal switch is arranged in two, both of which are fixedly connected to the transmission device and are located on both sides of the third dial block.

[0009] Further, the main stroke switch further comprises a third signal switch and a third dial block, the third dial block is detachably connected to the output shaft, and the third signal switch is arranged in two, both of which are fixedly connected to the transmission device and are located on both sides of the third dial block.

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

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

[0012] Preferably, the transmission device comprises a housing, a first driving gear, a second driving gear and a driven gear, the housing is fixedly connected in 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 engaged with the driven gear, the second driving gear is engaged with the driven gear, the first driving gear is coaxially fixedly connected with the first input shaft, the second driving gear is coaxially fixedly connected with the second input shaft, and the driven gear is coaxially fixedly connected with the output shaft.

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

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

[0015] The technical scheme of the utility model has the following beneficial effects:

[0016] Through the arrangement of the redundancy mechanism box, in normal use, the first clutch is in the engaged state, and the second clutch is in the disconnected state, in operation, power is transmitted from the first driving assembly to the first input shaft of the transmission assembly through the first clutch, and is transmitted to the output shaft through the transmission device to output, and drives the external operating rod to act, so that the closing or opening operation of the disconnecting switch is realized. When the first driving assembly fails, the first clutch is disconnected, and the second clutch is connected, power is transmitted from the second driving assembly to the second input shaft of the transmission assembly through the second clutch, and is transmitted to the output shaft through the transmission device to output, thereby realizing the closing or opening operation of the disconnecting switch. Therefore, when the first driving assembly fails, the second driving assembly can be controlled in time, so that the power grid can be restored to operation in a short time, compared with the mode that the operating personnel need to operate on site, the processing time is greatly saved, and the failure rate of the power grid is reduced.

[0017] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. Below, the utility model will be described in detail with reference to the drawings Figure 1 The utility model will be described further in detail. ACCOUT OF DRAWINGS

[0018] The drawings that form a part of this application are used to provide further understanding of the utility model, the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute undue limitation on the utility model. In the drawings:

[0019] Figure 1 It is the whole structure schematic diagram of high voltage disconnecting switch redundancy mechanism box of the utility model a kind of extra-high voltage direct current converter station.

[0020] Wherein, 1, frame body;2, first driving assembly;21, first power source;22, first speed reducer;3, second driving assembly;31, second power source;32, second speed reducer;4, transmission assembly;41, transmission device;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 stroke switch;51, third signal switch;52, third shift block;6, first stroke switch;61, first signal switch;62, first shift block;7, second stroke switch;71, second signal switch;72, second shift block;8, clamping. DETAILED DESCRIPTION

[0021] For the purpose of facilitating the understanding of the present application, a more comprehensive description of the present application will be given below, and a preferred embodiment of the present application is given. However, the present application can be realized 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 disclosure of the present application more thorough and comprehensive.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the specification of the present application herein is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0023] Embodiment:

[0024] Referring to Figure 1 The present embodiment provides a high-voltage disconnecting switch redundancy mechanism box for an extra-high voltage direct current converter station, comprising a frame body 1, a first driving assembly 2, a second driving assembly 3 and a transmission assembly 4, the first driving assembly 2 and the second driving assembly 3 are detachably connected in the frame body 1, the transmission assembly 4 comprises a transmission device 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 device 41 is fixedly connected in the frame body 1, the first input shaft 42 is connected on the transmission device 41, the first input shaft 42 is connected with the output end of the first driving assembly 2 through the first clutch 43, the second input shaft 44 is connected on the transmission device 41, the second input shaft 44 is connected with the output end of the second driving assembly 3 through the second clutch 45, the output shaft 46 is connected on the transmission device 41, and the end of the output shaft 46 away from the transmission device 41 extends out of the frame body 1.

[0025] It should be noted that the existing conventional arrangement is to directly drive the knife switch operating rod that needs to be operated by the driving assembly to act, and generally the driving assembly adopts the structure mode of motor plus speed reducer. When the motor or speed reducer fails, the motor or speed reducer needs to be replaced in time, and during the replacement process, the motor or speed reducer cannot be remotely controlled to close or open the switch, and the operator needs to rush to the scene to manually operate, which delays the normal operation of the power grid.

[0026] Specifically, the output shaft 46 is connected with the operating rod of the external disconnecting switch, and the operating rod is driven to rotate by the rotation of the output shaft 46, and then the knife switch of the disconnecting switch is driven to close or open.

[0027] It can be understood that, through the arrangement of the redundant mechanism box, in normal use, the first clutch 43 is in the engaged state, and the second clutch 45 is in the disconnected state. In operation, 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 41, and drives the external operating rod to move, so as to realize the closing or opening operation of the disconnecting switch. When the first drive assembly 2 fails, the first clutch 43 is disconnected, and the second clutch 45 is connected, and 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 41, and then the closing or opening operation of the disconnecting switch is realized. Thus, when the first drive assembly 2 fails, the second drive assembly 3 can be controlled in time, so that the power grid can be restored to operation in a short time. Compared with the mode of operating personnel going to the scene to operate, the processing time is greatly saved, and the failure rate of the power grid is reduced.

[0028] It should be noted that the first clutch 43 and the second clutch 45 are controlled by electricity, that is, a control circuit (not shown in the figure) is arranged in the frame 1, the first clutch 43 and the second clutch 45 are electrically connected with the control circuit (the electrical connection can be connected by wires; or the electrical connection can be connected by electromagnetic wave signal transmission and reception, that is, the first clutch 43 and the second clutch 45 transmit electromagnetic wave signals through electromagnetic transmitters, the control circuit receives the electromagnetic wave signals through electromagnetic receivers, and the control circuit also transmits electromagnetic wave signals through another electromagnetic transmitter, and the first clutch 43 and the second clutch 45 receive the electromagnetic wave signals through another electromagnetic receiver), and 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 assembly 2 and the second drive assembly 3 are electrically connected with the control circuit.

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

[0030] It can be understood that, by adopting the electromagnetic coupling, the on-off of the first clutch 43 or the on-off of the second clutch 45 can be conveniently controlled. When the first clutch 43 needs to be connected, the first clutch 43 only needs to be powered to be connected, which is convenient to control.

[0031] Further, a main operating travel switch 5 is further included, the main operating travel switch 5 includes a third signal switch 51 and a third dial block 52, the third dial block 52 is detachably connected to the output shaft 46, and the third signal switch 51 is arranged in two, and the two third signal switches 51 are fixedly connected to the transmission 41 by bolts, and the two third signal switches 51 are located on the two sides of the third dial block 52 respectively.

[0032] Specifically, the third dial 52 is detachably connected to the output shaft 46 by bolts, and rotates with the output shaft 46 when the output shaft 46 rotates, and the third dial 52 can drive two third signal switches 51 to act respectively when the third dial 52 rotates, wherein one of the third signal switches 51 corresponds to the closing of the external disconnecting switch, and the other of the third signal switches 51 corresponds to the shutter of the external disconnecting switch. It can be understood that when it is necessary to control the external disconnecting switch to perform the closing operation, the third dial 52 is rotated by the output shaft 46 to contact the third signal switch 51 corresponding to the closing, and the third signal switch 51 is driven to act, the third signal switch 51 sends a control signal to the control circuit, and the control circuit cuts off the power of the first driving assembly 2 in response to the signal sent by the third signal switch 51, and the closing operation is completed; when it is necessary to control the external disconnecting switch to perform the opening operation, the third dial 52 is reversely rotated by the output shaft 46 to contact the third signal switch 51 corresponding to the opening, and the third signal switch 51 is driven to act, the third signal switch 51 sends a control signal to the control circuit, and the control circuit cuts off the power of the first driving assembly 2 in response to the signal sent by the third signal switch 51, and the opening operation is completed. It should be noted that the third signal switch 51 is a micro-motion press switch, and in some other embodiments, the third signal switch 51 can also be a proximity switch.

[0033] Further, the first stroke switch 6 and the second stroke switch 7 are further included, the first stroke switch 6 includes the first signal switch 61 and the first dial 62, the first dial 62 is detachably connected to the output end of the first driving assembly 2, and the first signal switch 61 is arranged in two, both of the first signal switches 61 are fixedly connected to the frame 1, and both of the first signal switches 61 are located on both sides of the first dial 62 respectively; the second stroke switch 7 includes the second signal switch 71 and the second dial 72, the second dial 72 is detachably connected to the output end of the second driving assembly 3, and the second signal switch 71 is arranged in two, both of the second signal switches 71 are fixedly connected to the frame 1, and both of the second signal switches 71 are located on both sides of the second dial 72 respectively.

[0034] Specifically, the first travel switch 6 and the second travel switch 7 are electrically connected with the control circuit, and the structures of the first travel switch 6 and the second travel switch 7 are basically the same as that of the main travel switch 5, but the functions are different. The first travel switch 6 and the second travel switch 7 have a redundant control function. When the main travel switch 5 is damaged, the first travel switch 6 participates in the control, so that the first driving assembly 2 can be started and stopped smoothly, and the first driving assembly 2 is prevented from being damaged due to the excessive rotation angle of the output shaft 46 caused by the misoperation when the main travel switch 5 is lost. In addition, a fault signal is transmitted to the control circuit to prompt the operator to repair as soon as possible. In addition, the first travel switch 6 also has a monitoring function for the first driving assembly 2. When the first travel switch 6 cannot reach the predetermined position, it can be determined through the control circuit that the first driving assembly 2 is stuck or damaged. At this time, the control circuit controls the first clutch 43 to be disconnected, controls the second clutch 45 to be connected, and controls the second driving assembly 3 to work, so as to ensure the smooth operation of the opening or closing action, and a fault signal is transmitted to the control circuit. The structure of the first signal switch 61 and the second signal switch 71 is the same as that of the third signal switch 51, and will not be described here.

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

[0036] Specifically, the first power source 21 is an electric motor, the first speed reducer 22 is arranged transversely in the frame 1, the first power source 21 is connected to the input end of the first speed reducer 22 through bevel gears, so that the first power source 21 and the first speed reducer 22 are arranged vertically, the second power source 31 is also an electric motor, the second speed reducer 32 is arranged transversely in the frame 1, and the second speed reducer 32 is arranged symmetrically with the first speed reducer 22, the second power source 31 is connected to the input end of the second speed reducer 32 through bevel gears, so that the second power source 31 and the second speed reducer 32 are arranged vertically. It should be noted that if the first power source 21 and the first speed reducer 22 are arranged in a transverse straight-line butt joint, it will occupy a large position in the transverse direction, and the entire device will become a long strip. By changing the position of the first power source 21 relative to the first speed reducer 22 through bevel gears, the first power source 21 and the first speed reducer 22 occupy part of the position in the transverse and longitudinal directions, so that the entire mechanism is more compact, the frame 1 can be made smaller, and the application in some small space is facilitated. In addition, the smaller frame 1 can save more production materials, which is conducive to reducing the production cost.

[0037] Preferably, 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 in the frame 1 by bolts, of course, in other embodiments, the housing 411 can also be fixed in the frame 1 by welding or riveting; both ends of the first driving gear 412 and the second driving gear 413 are provided with bearings, the first driving gear 412, the second driving gear 413 and the driven gear 414 are rotatably connected in the housing 411 by a plurality of bearings, the first driving gear 412 is engaged with the driven gear 414, the second driving gear 413 is engaged with the driven gear 414, the first driving gear 412 is coaxially fixedly connected with the first input shaft 42, the second driving gear 413 is coaxially fixedly connected with the second input shaft 44, and the driven gear 414 is coaxially fixedly connected with the output shaft 46. The third signal switch 51 is fixedly connected on the housing 411.

[0038] It can be understood that when power is input from the first input shaft 42, the driven gear 414 is driven to rotate by the first driving gear 412, and then the output shaft 46 is driven 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 driven gear 414 is driven to rotate by the second driving gear 413, and then the output shaft 46 is driven to rotate, so that the power is smoothly output from the output shaft 46. Through such an arrangement, when power is input from any one of 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 first driving gear 412 and the second driving gear 413 have equal diameters, and the diameter of the first driving gear 412 is smaller than that of the driven gear 414.

[0040] It can be understood that when the small gear drives the large gear to rotate, the speed is slower and the torque is larger, 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 torque of rotation is larger and the speed is slower, so that the torque output from the output shaft 46 is larger and more stable, and the opening or closing of the switch can be smoothly performed.

[0041] Preferably, the output shaft 46 is provided with a clamp 8 at an end away from the transmission 41, and the clamp 8 is detachably connected on the output shaft 46.

[0042] Specifically, the output shaft 46 is arranged in a hexagonal prism shape near one end of the clamp 8, the clamp 8 comprises a first clamp piece, a second clamp piece and a fastening bolt, a hexagonal prism-shaped through hole is enclosed between the first clamp piece and the second clamp piece, the first clamp piece and the second clamp piece are clamped on the output shaft 46 through the fastening bolt, so that the output shaft 46 is limited in the hexagonal prism-shaped through hole, and in addition, the hexagonal prism-shaped through hole is connected with the operating rod of the external knife switch, when the output shaft 46 rotates, the torque is transmitted to the operating rod of the external knife switch through the clamp 8, so that the knife switch is driven to operate the opening or closing operation. During the production and installation process, there will be errors 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 distance between the output shaft 46 and the knife switch operating rod is far, the clamp 8 can be moved towards the knife switch operating rod, so as to compensate for the errors caused during the production and installation process, so that the output shaft 46 can be smoothly connected with the knife switch operating rod through the clamp 8.

[0043] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A redundant mechanism box of a high-voltage disconnecting switch of an extra-high voltage direct current converter station, characterized in that: The utility model relates to a kind of high-voltage disconnecting switch redundancy mechanism box of UHV DC converter station, including frame (1), first drive assembly (2), second drive assembly (3) and transmission assembly (4), The first drive assembly (2) and second drive assembly (3) are detachably connected in the frame (1), The transmission assembly (4) includes transmission (41), first input shaft (42), first clutch (43), second input shaft (44), second clutch (45) and output shaft (46), the transmission (41) is fixedly connected in the frame (1), The first input shaft (42) is connected on the transmission (41), and the first input shaft (42) is connected with the output end of the first drive assembly (2) by first clutch (43), The second input shaft (44) is connected on the transmission (41), and the second input shaft (44) is connected with the output end of the second drive assembly (3) by second clutch (45), The output shaft (46) is connected on the transmission (41), and the end of the output shaft (46) away from the transmission (41) is stretched out from the frame (1).

2. The high-voltage disconnecting switch redundancy mechanism box of UHV DC converter station according to claim 1, wherein: The first clutch (43) and the second clutch (45) are both electromagnetic couplings.

3. The high-voltage disconnecting switch redundancy mechanism box of UHV DC converter station according to claim 1, wherein: Further comprising a main stroke switch (5), the main stroke switch (5) comprises a third signal switch (51) and a third dial block (52), the third dial block (52) is detachably connected on the output shaft (46), the third signal switch (51) is arranged two, two third signal switches (51) are both fixedly connected on the transmission (41), and two third signal switches (51) are respectively located on both sides of the third dial block (52).

4. The high-voltage disconnecting switch redundancy mechanism box of UHV DC converter station according to claim 3, wherein: Further comprising a first stroke switch (6) and a second stroke switch (7), The first stroke switch (6) comprises a first signal switch (61) and a first dial block (62), the first dial block (62) is detachably connected on the output end of the first drive assembly (2), the first signal switch (61) is arranged two, two first signal switches (61) are both fixedly connected on the frame (1), and two first signal switches (61) are respectively located on both sides of the first dial block (62); The second stroke switch (7) comprises a second signal switch (71) and a second dial block (72), the second dial block (72) is detachably connected on the output end of the second drive assembly (3), the second signal switch (71) is arranged two, two second signal switches (71) are both fixedly connected on the frame (1), and two second signal switches (71) are respectively located on both sides of the second dial block (72). ​ 5. The high-voltage disconnecting switch redundancy mechanism box of an extra-high voltage direct current converter station according to claim 1, characterized in that: the first drive assembly (2) comprises a first power source (21) and a first speed reducer (22), the first speed reducer (22) is detachably connected to the frame body (1), an input end of the first speed reducer (22) is connected to an output end of the first power source (21), and an output end of the first speed reducer (22) is connected to the first clutch (43).

6. The high-voltage disconnecting switch redundancy mechanism box of an extra-high voltage direct current converter station according to claim 5, characterized in that: the second drive assembly (3) comprises a second power source (31) and a second speed reducer (32), the second speed reducer (32) is detachably connected to the frame body (1), an input end of the second speed reducer (32) is connected to an output end of the second power source (31), and an output end of the second speed reducer (32) is connected to the second clutch (45).

7. The high-voltage disconnecting switch redundancy mechanism box of an extra-high voltage direct current converter station according to any one of claims 1-6, characterized in that: the transmission device (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 in the frame body (1), the first driving gear (412), the second driving gear (413) and the driven gear (414) are all rotationally connected in 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 with the first input shaft (42), the second driving gear (413) is coaxially fixedly connected with the second input shaft (44), and the driven gear (414) is coaxially fixedly connected with the output shaft (46).

8. The high-voltage disconnecting switch redundancy mechanism box of an extra-high voltage direct current converter station according to claim 7, characterized in that: the first driving gear (412) and the second driving gear (413) are equal in diameter, and the diameter of the first driving gear (412) is smaller than the diameter of the driven gear (414).

9. The high-voltage disconnecting switch redundancy mechanism box of an extra-high voltage direct current converter station according to any one of claims 1-6, characterized in that: an end of the output shaft (46) away from the transmission device (41) is provided with a clamp (8), and the clamp (8) is detachably connected to the output shaft (46).

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