Converter valve submodule maintenance tool and maintenance method thereof

Abstract

A converter valve submodule maintenance tool is characterized by comprising a guide rail sliding table structure, a butt joint device, a transfer platform and a hoisting system. The guide rail sliding table structure is arranged at the bottom of the converter valve; the converter valve sub-module is fixed on the guide rail sliding table structure; the transfer platform is detachably connected with the hoisting system; and in the working condition of hoisting the converter valve sub-module, the guide rail sliding table structure is connected with the transfer platform through a docking device rail. According to the invention, the docking device and the transfer platform are used to pull the sub-module to the transfer platform, the hoisting system is used to hoist the sub-module and the transfer platform to the ground for maintenance, the whole operation and maintenance process is completed outside the converter valve, and the operation and maintenance personnel do not enter the valve tower. The submodules are installed on the guide rail sliding table structure, the sliding table bears the submodules to slide on the first guide rail, and the whole structure does not use lubricating agents with grease.

Description

Technical Field

[0001] The present invention relates to the field of flexible direct current power transmission systems, and in particular to a converter valve submodule maintenance tool and a maintenance method thereof. Background Art

[0002] The physical structure of the modular multilevel converter valve (MMC) is characterized by the fact that the converter valve is composed of several converter valve submodules connected in series. When a limited number of converter valve submodules within the redundancy range of the converter valve fail, they can be bypassed without affecting the operation of the entire power system. The faulty converter valve submodule can be replaced when the system reaches the specified operation and maintenance time; if the number of converter valve submodule failures exceeds the system redundancy, emergency shutdown is required to replace the faulty submodule. Whether in the normal operation and maintenance time period or the emergency shutdown time period, the time to replace the submodule directly affects the system shutdown time, and thus affects the power grid operation efficiency, so it is of great significance to replace the converter valve submodule as quickly as possible.

[0003] The current strategy for replacing the converter valve submodule is for the operation and maintenance personnel to enter the valve tower to remove and replace the components of the faulty submodule. This method cannot guarantee the safety of the operation and maintenance personnel, and the replacement time is long. The parts of the removed converter valve submodule are easy to fall into the valve tower, affecting the insulation performance of the converter valve.

[0004] Therefore, how to solve the current low efficiency of maintaining the converter valve submodule is a technical problem that needs to be solved urgently in the field of flexible DC transmission systems. Summary of the invention

[0005] In order to solve the problems of low efficiency in maintaining converter valve submodules in the prior art, the present invention provides a converter valve submodule maintenance tool, including: a guide rail slide structure, a docking device, a transfer platform and a hoisting system; the guide rail slide structure is arranged at the bottom of the converter valve, and the converter valve submodule is fixed on the guide rail slide structure;

[0006] The transfer platform is detachably connected to the hoisting system;

[0007] When the converter valve submodule is in the working condition of being hoisted, the guide rail slide structure is connected to the transfer platform via a docking device track.

[0008] Preferably, the guide rail and slide structure comprises a first guide rail and a slide that are slidably matched, the first guide rail is fixedly arranged on the converter valve, and there are one or more slides; the converter valve submodules are respectively fixedly arranged on each slide.

[0009] Preferably, the docking device includes: a second guide rail, a traction system disposed at a side end of the second guide rail for pulling the converter valve sub-module from the first guide rail (11) to the second guide rail (21), an alignment structure disposed at a front end of the second guide rail for calibrating the alignment between the first guide rail (11) and the second guide rail (21), and a locking structure disposed at a front end of the second guide rail (21) for locking the connection between the first guide rail (11) and the second guide rail (21);

[0010] When in the working condition of hoisting the converter valve sub-module, the docking device moves to the vicinity of the guide rail sliding table structure under the converter valve sub-module to be replaced, and one end of the second guide rail is docked with one end of the first guide rail.

[0011] Preferably, the transfer platform includes: a rectangular bottom plate, a third guide rail provided on the upper surface of the rectangular bottom plate, a transmission system provided at a side end of the third guide rail for driving the converter valve sub-module from the second guide rail (21) to the third guide rail (31), a tapered pin provided at a front end of the rectangular bottom plate for connecting the second guide rail (21) and the transfer platform (3), and a connecting rod (32) for fixing the connection between the second guide rail (21) and the third guide rail (31);

[0012] One end of the third guide rail is docked with the other end of the second guide rail, and the sliding table slides on the third guide rail.

[0013] Preferably, the alignment structure includes an upper clamping plate fixedly provided above the second guide rail and a lower clamping plate fixedly provided below the second guide rail;

[0014] The upper clamping plate and the lower clamping plate fix the first guide rail (11) between the upper and lower parts, and at this time, the first guide rail (11) and the second guide rail (21) are in the same plane.

[0015] Preferably, the transfer platform further includes: a locking structure disposed at a front end of the third guide rail for locking the connection between the second guide rail (21) and the third guide rail (31).

[0016] Preferably, the locking structure is a threaded locking structure, and the locking structure is threadedly connected to the converter valve sub-module.

[0017] Preferably, the hoisting system includes: a hoisting rod assembly detachably connected to the transfer platform, and a lifting device provided on the upper part of the hoisting rod assembly.

[0018] Preferably, the sliding table includes a sliding table body and a bearing system. The sliding table body is fixedly installed with the converter valve sub-module, and the bearing system is slidably connected to the first guide rail.

[0019] Preferably, the drive system includes: at least one power input system disposed at a side end of the transfer platform, at least one converter connected to the power input system, at least one optical axis disposed perpendicular to the converter, and a ball screw nut connected to the optical axis.

[0020] Preferably, the lifting rod assembly includes: a plurality of lifting rods and at least one upper guide groove;

[0021] One end of the lifting rod is connected to the transfer platform, and the other end is connected to the lifting device; the upper guide groove is fixed at the connection between the lifting rod and the lifting device.

[0022] The maintenance method of the converter valve sub-module maintenance tooling as described in any one of the above, includes the following steps:

[0023] Sequentially connect the guide rail sliding table structure, the docking device and the transfer platform at the lower part of the converter valve sub-module to be replaced;

[0024] Move the converter valve sub-module to be replaced from the guide rail sliding table structure through the docking device to the transfer platform;

[0025] Lift the converter valve sub-module to be replaced to the ground through the lifting system;

[0026] Lift the converter valve sub-module to be installed to the guide rail sliding table structure through the lifting system;

[0027] Sequentially connect the transfer platform, the docking device and the guide rail sliding table structure at the lower part of the converter valve sub-module to be installed;

[0028] Move the converter valve sub-module to be installed from the transfer platform through the docking device to the guide rail sliding table structure.

[0029] Preferably, the step of sequentially connecting the guide rail sliding table structure, the docking device and the transfer platform at the lower part of the converter valve sub-module to be replaced includes:

[0030] Connect the guide rail sliding table structure and the docking device in an orbital connection;

[0031] Drive the transfer platform to move to the guide rail sliding table structure at the lower part of the converter valve sub-module to be replaced by using the lifting system;

[0032] Connect the docking device and the transfer platform in an orbital connection.

[0033] Preferably, the step of sequentially connecting the transfer platform, the docking device and the guide rail sliding table structure at the lower part of the converter valve sub-module to be installed includes:

[0034] Use the hoisting system to drive the transfer platform to move to the guide rail sliding table structure below the converter valve sub-module to be installed;

[0035] Connect the transfer platform to the docking device track;

[0036] Connect the docking device to the guide rail sliding table structure track.

[0037] Preferably, moving the converter valve sub-module to be replaced from the guide rail sliding table structure to the transfer platform through the docking device includes:

[0038] Based on the traction force of the traction system, move the converter valve sub-module to be replaced from the guide rail sliding table structure to the docking device;

[0039] Based on the driving force of the transmission system, move the converter valve sub-module to be replaced from the docking device to the transfer platform.

[0040] Preferably, moving the converter valve sub-module to be installed from the transfer platform to the guide rail sliding table structure through the docking device includes:

[0041] Based on the driving force of the transmission system, move the converter valve sub-module to be installed from the transfer platform to the docking device;

[0042] Based on the traction force of the traction system, move the converter valve sub-module to be installed from the docking device to the guide rail sliding table structure.

[0043] Preferably, the transfer platform is connected to the docking device through a tapered pin, and the converter valve sub-module to be replaced is connected to the transfer platform through a connecting rod.

[0044] Preferably, when in the working condition of hoisting the converter valve sub-module to be replaced, when the guide block of the converter valve sub-module to be replaced completely slides into the upper guide groove, the converter valve sub-module to be replaced is locked with the hoisting rod assembly.

[0045] Compared with the prior art, the beneficial effects of the present invention are:

[0046] The present invention provides a maintenance tool for a converter valve sub-module and its maintenance method, including:

[0047] Guide rail slider structure, docking device, transfer platform and hoisting system; the guide rail slider structure is arranged at the bottom of the converter valve, and the converter valve sub-module is fixed on the guide rail slider structure; the transfer platform is detachably connected to the hoisting system; when in the working condition of hoisting the converter valve sub-module, the guide rail slider structure is connected to the transfer platform through the docking device track. By arranging the guide rail slider structure at the bottom of the converter valve, the stable fixation and flexible movement of the converter valve sub-module are realized. The guide rail slider structure can accurately carry the sub-module and move smoothly along the track when needed, providing convenient conditions for subsequent hoisting and transfer. The detachable connection design of the transfer platform and the hoisting system not only ensures the close cooperation of the two during hoisting operations, but also facilitates quick separation under non-hoisting working conditions, improving the versatility of the equipment and the utilization rate of the site. In addition, the guide rail slider structure is connected to the transfer platform through the docking device track. This connection method not only ensures the stable transmission of the converter valve sub-module during hoisting, but also realizes modular docking, reducing the complexity and error of manual operation, improving hoisting efficiency and safety, reducing the risk of equipment damage caused by improper operation, and overall optimizing the hoisting and transfer process of the converter valve sub-module, improving work efficiency and reliability.

[0048] Compared with the traditional manual handling and aerial work methods, the method of the present invention can quickly complete the disassembly, transfer and replacement of the sub-module, significantly improving the maintenance work efficiency, reducing the equipment downtime, and ensuring the stable operation of the power system. Brief Description of the Drawings

[0049] Figure 1 It is a schematic diagram of the overall structure of a maintenance tool for a converter valve sub-module of the present invention;

[0050] Figure 2 It is a schematic diagram of the structure of the first guide rail and the slider of the present invention;

[0051] Figure 3 It is a schematic diagram of the structure of the docking device of the present invention;

[0052] Figure 4 It is a schematic diagram of the structure of the transfer platform of the present invention;

[0053] Figure 5 It is a schematic diagram of the alignment structure of the present invention;

[0054] Figure 6 It is a schematic diagram of the locking structure of the present invention;

[0055] Figure 7 It is a schematic diagram of the transmission system of the present invention;

[0056] Figure 8 It is a schematic diagram of the structure of the hoisting system of the present invention;

[0057] Figure 9 Schematic diagram of the hoisting process of the docking device and transfer platform of the present invention;

[0058] Figure 10 Schematic diagram of the maintenance method of a converter valve sub-module maintenance tool of the present invention;

[0059] 1 - Guide rail and slide structure; 2 - Docking device; 3 - Transfer platform; 4 - Hoisting system; 11 - First guide rail; 12 - Slide; 21 - Second guide rail; 22 - Alignment structure; 23 - Locking structure; 31 - Third guide rail; 32 - Connecting rod; 33 - Transmission system; 41 - Hoisting rod assembly; 42 - Lifting equipment; 121 - Slide body; 122 - Bearing system; 331 - Power input system; 332 - Converter; 333 - Optical axis; 334 - Ball screw nut; 411 - Hoisting rod; 412 - Upper guide groove. Detailed implementation manners

[0060] To better understand the present invention, the content of the present invention will be further described below in conjunction with the specification drawings and examples.

[0061] As Figure 1-9 shown, the present invention provides a converter valve sub-module maintenance tool, including:

[0062] A guide rail and slide structure 1, a docking device 2, a transfer platform 3, and a hoisting system 4; the guide rail and slide structure 1 is arranged at the bottom of the converter valve, and the converter valve sub-module is fixed on the guide rail and slide structure 1;

[0063] The transfer platform 3 is detachably connected to the hoisting system 4;

[0064] When in the working condition of hoisting the converter valve sub-module, the guide rail and slide structure 1 and the transfer platform 3 are connected by track through the docking device 2.

[0065] The guide rail and slide structure 1 includes a first guide rail 11 and a slide 12 that are slidably matched. The first guide rail 11 is fixedly arranged on the converter valve, and the slide 12 is one or more; the converter valve sub-modules are respectively fixedly arranged on the respective slides 12.

[0066] Through a series of orderly and efficient steps such as rail alignment, hoisting by the docking device 2, the transfer platform 3, and the hoisting system 4, the present invention greatly shortens the maintenance time of the converter valve sub-module. Compared with the traditional manual handling and aerial work methods, this device can quickly complete the disassembly, transfer, and replacement of the sub-module, significantly improving the maintenance work efficiency, reducing the equipment downtime, and ensuring the stable operation of the power system. At the same time, using electric tools when disassembling and installing the sub-module can improve the efficiency and ensure the safety of personnel.

[0067] As Figure 2As shown, the converter valve sub-module is slidably connected to the first guide rail 11 through a sliding table 12. The sliding table 12 includes a sliding table body 121 and a bearing system 122. The sliding table body 121 is fixedly installed with the converter valve sub-module, and the bearing system 122 is slidably connected to the first guide rail 11.

[0068] The sliding table 12 can carry the converter valve sub-module to slide on the first guide rail 11, and no lubricant is used between the first guide rail 11 and the sliding table 12.

[0069] As Figure 3 shown, the docking device 2 includes: a second guide rail 21, a traction system provided at the side end of the second guide rail 21 for pulling the converter valve sub-module from the first guide rail 11 to the second guide rail 21, an alignment structure 22 provided at the front end of the second guide rail 21 for calibrating the alignment of the first guide rail 11 and the second guide rail 21, and a locking structure provided at the front end of the second guide rail 21 for locking the connection between the first guide rail 11 and the second guide rail 21;

[0070] When in the working condition of hoisting the converter valve sub-module, the docking device 2 moves to the vicinity of the guide rail sliding table structure 1 under the converter valve sub-module to be replaced, and one end of the second guide rail 21 is docked with one end of the first guide rail 11.

[0071] The second guide rail 21 is located at the rear end of the docking device 2 and is flush with the installation position of the first guide rail 11, ensuring that the converter valve sub-module can smoothly and accurately slide into the docking device 2 along the first guide rail 11, providing precise guidance for subsequent maintenance operations; the flush setting of the second guide rail 21 reduces the possible jamming or offset phenomenon when the converter valve sub-module enters the docking device 2, improving the fluency and reliability of the entire maintenance process.

[0072] As Figure 5 shown, the alignment structure 22 includes an upper clamping plate fixedly provided above the second guide rail 21 and a lower clamping plate fixedly provided below the second guide rail 21;

[0073] The upper clamping plate and the lower clamping plate fix the first guide rail 11 between the upper and lower parts. At this time, the first guide rail 11 and the second guide rail 21 are in the same plane.

[0074] The docking device 2 aligns the guide rail on the docking device with the sub-module guide rail completely through the alignment structure 22. The alignment structure 22 is divided into upper and lower parts, which are respectively fixed above and below the guide rail of the docking device. The alignment structure 22 can clamp the converter valve sub-module guide rail between the upper and lower parts. At this time, the two guide rails are in the same plane.

[0075] The alignment structure 22 is provided at the connection end of the second guide rail 21 and the first guide rail 11. Its main function is to ensure the precise alignment between the second guide rail 21 and the first guide rail 11. In actual operation, the converter valve sub-module needs to accurately enter the docking device 2 along the first guide rail 11. Any slight deviation may lead to docking failure or equipment damage. Through precise mechanical design and adjustment, the alignment structure 22 can automatically or manually correct the position deviation between the second guide rail 21 and the first guide rail 11, ensuring seamless docking at the connection end, greatly improving the fault tolerance of maintenance operations, reducing the alignment error caused by human factors or equipment wear, ensuring that the converter valve sub-module can smoothly enter the docking device 2, and laying a foundation for subsequent traction, connection and other operations.

[0076] As Figure 6 shown, the locking structure is provided on either side of the second guide rail 21. Its function is to firmly lock the sub-module on the docking device 2 after the converter valve sub-module enters the docking device 2 and reaches the specified position. The locking structure adopts a mechanical locking method, such as a buckle, a bolt or a hydraulic locking device, etc., which can generate sufficient locking force between the converter valve sub-module and the docking device 2 to prevent the sub-module from shifting or falling off during maintenance. The above locking mechanism not only ensures the safety of maintenance operations, but also provides stable support for subsequent transfer and lifting operations, ensuring that the converter valve sub-module remains fixed during the entire maintenance process, and avoiding equipment damage or maintenance accidents caused by vibration or external forces.

[0077] The second guide rail 21 is provided with a locking mechanism. The head of the locking mechanism has an external thread and can be screwed into the internal thread of the sub-module. At this time, the guide rail of the docking device is completely aligned and locked with the guide rail of the sub-module.

[0078] Through the alignment structure 22, the guide rail on the docking device 2 can be accurately docked with the guide rail of the first part, and the locking structure can ensure that the guide rails do not get misaligned during the entire operation and maintenance process.

[0079] As Figure 4 shown, the transfer platform 3 includes: a rectangular bottom plate. The upper surface of the rectangular bottom plate is provided with a third guide rail 31. A transmission system 33 for transmitting the converter valve sub-module from the second guide rail 21 to the third guide rail 31 is provided at the side end of the third guide rail 31. A tapered pin connecting the second guide rail 21 and the transfer platform 3 and a connecting rod 32 for fixing the connection between the second guide rail 21 and the third guide rail 31 are provided at the front end of the rectangular bottom plate;

[0080] One end of the third guide rail 31 is docked with the other end of the second guide rail 21, and the sliding table 12 slides on the third guide rail 31.

[0081] The transfer platform 3 further includes: a locking structure disposed at the front end of the third guide rail 31 for locking the connection between the second guide rail 21 and the third guide rail 31. The locking structure is a threaded locking structure, and the locking structure is threadedly connected to the converter valve sub-module.

[0082] When the converter valve sub-module is towed to the docking device 2, the tapered pin of the transfer platform 3 aligns with the corresponding structure of the docking device 2 and inserts, realizing the mechanical connection between the two, ensuring the stable combination between the transfer platform 3 and the docking device 2, and providing a reliable physical basis for subsequent connection and transfer operations.

[0083] The front end of the third guide rail 31 is docked with the second guide rail 21. The design of the guide rail ensures the smooth movement of the converter valve sub-module on the transfer platform 3, reduces friction and vibration during the movement, and improves the stability and reliability of the transfer.

[0084] The connecting rod 32 is disposed at the front end of the third guide rail 31 and is used to connect the converter valve sub-module to the transfer platform 3. After the tapered pin is docked with the docking device 2, the connecting rod 32 fixes the converter valve sub-module on the transfer platform 3 by means of mechanical locking (such as bolts, buckles, etc.).

[0085] The drive system 33 is disposed at the side end of the transfer platform 3 and is responsible for driving the converter valve sub-module on the third guide rail 31 to move. The drive system 33 is driven by a motor and realizes the precise movement of the converter valve sub-module through transmission mechanisms such as gears, belts or ball screws. The precise control of the drive system 33 can ensure the position accuracy of the converter valve sub-module on the transfer platform 3 and reduce equipment damage caused by movement errors.

[0086] The locking structure is disposed on either side of the third guide rail 31 and is used to lock the converter valve sub-module on the transfer platform 3 after it moves into place. The locking structure adopts a hydraulic locking method and can quickly lock when the converter valve sub-module reaches the specified position, preventing it from displacing or falling off during transfer and hoisting. The above locking mechanism not only ensures the safety of the transfer process but also improves the reliability of the entire maintenance operation.

[0087] The transfer platform 3 includes a connecting rod 32, a transmission structure, a guide rail, and a locking mechanism. Before the transfer platform 3 is lifted by the third part of the hoisting system 4 to the front of the sub-module to be replaced, the transfer platform 3 is connected to the docking device 2 through a tapered pin, which can ensure the precise docking of the guide rail on the transfer platform 3 and the guide rail on the docking device 2. The connecting rod 32 is connected to the converter valve sub-module, and the sub-module can be towed onto the guide rail of the transfer platform 3 through the transmission system 33. The transmission system 33 consists of a ball screw, a lead screw nut, a smooth shaft 333, and several commutators. The ball screw pair can convert rotational motion into linear motion, and the smooth shaft 333 and the commutators can change the position of the power input to any direction, and the suitable power input direction can be selected according to the actual working conditions for increase or decrease. The locking mechanism can lock the entire transmission system 33 after the sub-module is towed in place, so that the sub-module will not displace on the guide rail.

[0088] As Figure 5 shown, the hoisting system 4 includes: a hoisting rod assembly 41 detachably connected to the transfer platform 3, and a hoisting device 42 provided on the upper part of the hoisting rod assembly 41.

[0089] The hoisting system 4 consists of a track, and the hoisting device 42 includes but is not limited to a manual hoist, an electric hoist, an overhead crane), a sling limiting device. The hoisting device 42 can hoist in front of any sub-module of the converter valve. The sling limiting device is installed on the converter valve, which can limit the flexible sling of the hoisting device 42 to ensure that the sling of the hoisting device 42 does not collide with the converter valve.

[0090] The hoisting rod assembly 41 is one of the core components of the hoisting system 4. It is connected to the transfer platform 3 in a detachable manner, so that the hoisting rod assembly 41 can be quickly installed and disassembled according to different maintenance scenarios and requirements, improving the flexibility and applicability of the hoisting system 4. The hoisting rod assembly 41 is made of high-strength metal materials, with sufficient load-bearing capacity and stability, and can safely support the weight of the converter valve sub-module. Its design also considers the precise docking with the transfer platform 3 to ensure that it can be quickly and accurately completed during the connection process, reducing the operation time and labor intensity.

[0091] The hoisting device 42 is the power source of the hoisting system 4. One end is connected to the hoisting rod assembly 41, and the other end is connected to the top of the valve tower. The hoisting device 42 uses equipment such as an electric hoist and a sling, which can provide sufficient lifting force and precise control ability to ensure the smoothness and safety of the converter valve sub-module during hoisting. The operating system of the hoisting device 42 is designed with a variety of safety protection functions, such as overload protection, limit protection, etc., which can monitor the equipment status in real time during hoisting to prevent safety accidents caused by operating errors or equipment failures.

[0092] As Figure 8As shown in the figure, the hoisting rod assembly 41 includes a hoisting rod 411 and an upper guide groove 412. After the sub-module is towed to the transfer platform 3, the center of gravity of the sub-module and the hoisting point are on the same vertical line, and the guide block on the sub-module slides into the upper guide groove 412 to ensure that the transfer platform 3 does not deflect in any direction during the transfer process.

[0093] As Figure 7 shown in the figure, the transmission system 33 includes: at least one power input system 331 arranged at the side end of the transfer platform 3, at least one converter 332 connected to the power input system 331, at least one optical axis 333 arranged perpendicular to the converter 332, and a ball screw nut 334 connected to the optical axis 333.

[0094] The power input system 331 is arranged at the side end of the transfer platform 3 and is the power source of the transmission system 33. It is driven by a motor, and the rotational motion of the motor provides power for the entire transmission system 33. The selection of the motor should be determined according to the weight and moving speed requirements of the converter valve sub-module to ensure that sufficient torque and speed can be provided.

[0095] The hoisting rod assembly 41 includes: multiple hoisting rods 411 and at least one upper guide groove 412;

[0096] One end of the hoisting rod 411 is connected to the transfer platform 3, and the other end is connected to the lifting equipment 42; the upper guide groove 412 is fixed at the connection between the hoisting rod 411 and the lifting equipment 42.

[0097] Embodiment 2

[0098] As Figure 10 shown in the figure, the present invention also provides a maintenance method for a maintenance tool for a converter valve sub-module, including:

[0099] Sequentially connect the guide rail sliding table structure 1, the docking device 2, and the transfer platform 3 at the lower part of the converter valve sub-module to be replaced;

[0100] Move the converter valve sub-module to be replaced from the guide rail sliding table structure 1 to the transfer platform 3 through the docking device 2;

[0101] Lift the converter valve sub-module to be replaced to the ground through the hoisting system 4;

[0102] Lift the converter valve sub-module to be installed to the guide rail sliding table structure 1 through the hoisting system 4;

[0103] Sequentially connect the transfer platform 3, the docking device 2, and the guide rail sliding table structure 1 at the lower part of the converter valve sub-module to be installed;

[0104] Move the converter valve sub-module to be installed from the transfer platform 3 to the guide rail sliding table structure 1 through the docking device 2.

[0105] Connect the guide rail sliding table structure 1 at the lower part of the converter valve sub-module to be replaced, the docking device 2, and the transfer platform 3 in sequence, including:

[0106] Orbitally connect the guide rail sliding table structure 1 and the docking device 2;

[0107] Drive the transfer platform 3 to move to the guide rail sliding table structure 1 at the lower part of the converter valve sub-module to be replaced by using the hoisting system 4;

[0108] Orbitally connect the docking device 2 and the transfer platform 3.

[0109] Connect the transfer platform 3, the docking device 2, and the guide rail sliding table structure 1 at the lower part of the converter valve sub-module to be installed in sequence, including:

[0110] Drive the transfer platform 3 to move to the guide rail sliding table structure 1 at the lower part of the converter valve sub-module to be installed by using the hoisting system 4;

[0111] Orbitally connect the transfer platform 3 and the docking device 2;

[0112] Orbitally connect the docking device 2 and the guide rail sliding table structure 1.

[0113] Move the converter valve sub-module to be replaced from the guide rail sliding table structure 1 to the transfer platform 3 through the docking device 2, including:

[0114] Based on the traction force of the traction system, move the converter valve sub-module to be replaced from the guide rail sliding table structure 1 to the docking device 2;

[0115] Based on the driving force of the transmission system 33, move the converter valve sub-module to be replaced from the docking device 2 to the transfer platform 3.

[0116] Move the converter valve sub-module to be installed from the transfer platform 3 to the guide rail sliding table structure 1 through the docking device 2, including:

[0117] Based on the driving force of the transmission system 33, move the converter valve sub-module to be installed from the transfer platform 3 to the docking device 2;

[0118] Based on the traction force of the traction system, move the converter valve sub-module to be installed from the docking device 2 to the guide rail sliding table structure 1.

[0119] The transfer platform 3 is connected to the docking device 2 through a tapered pin, and the converter valve sub-module to be replaced is connected to the transfer platform 3 through a connecting rod 32.

[0120] The maintenance personnel manually align the second guide rail 21 with the first guide rail 11 on the converter valve sub-module to be replaced, and fix the docking device 2 on the converter valve. The hoisting system 4 is debugged, and the sling limiting device of the hoisting system 4 is installed on the converter valve. The lifting equipment 42 moves above the converter valve sub-module to be replaced to limit the flexible sling. The transfer platform 3 is hoisted in front of the docking device 2 through the hoisting system 4, and the transfer platform 3 and the docking device 2 are connected and fixed. As Figure 1 shown, at this time, the guide rail on the docking device 2 should be aligned with the guide rail on the transfer platform 3, and the drive system 33 is connected to the converter valve sub-module to be replaced through the guide rod. The converter valve sub-module to be replaced is towed to the fixed position of the transfer platform 3. At this time, the guide block on the sub-module to be replaced should exactly slide into the upper guide groove 412 completely, and the drive system 33 is locked using the locking device. The connection between the docking device 2 and the transfer platform 3 is released, and the converter valve sub-module to be replaced is hoisted to the ground along with the transfer platform 3 through the hoisting system 4 for replacement.

[0121] Throughout the maintenance process, through a series of orderly and efficient steps such as precise guide rail alignment, traction by the traction system, docking connection, movement of the drive system 33, and hoisting by the hoisting system 4, the maintenance time of the converter valve sub-module is greatly shortened. Compared with the traditional manual handling and aerial work methods, this method can quickly complete the disassembly, transfer, and replacement of the sub-module, significantly improving the maintenance work efficiency, reducing the equipment downtime, and ensuring the stable operation of the power system.

[0122] From the precise alignment of the second guide rail 21 and the first guide rail 11, to the precise control of the traction force and speed by the traction system, to the conical pin docking, connection of the connecting rod 32, and locking of the locking system, safety in operation is fully considered in every link. Especially in the aerial work scenario, with the assistance of the drive system 33 and the hoisting system 4, it is avoided that the maintenance personnel directly contact the converter valve sub-module for complex operations, reducing the risk of safety accidents caused by human errors, and ensuring the personal safety of the maintenance personnel and the safe operation of the equipment.

[0123] The precise guide rail alignment, the close cooperation between the docking device 2 and the transfer platform 3, and the smooth movement of the drive system 33 ensure the position accuracy of the converter valve sub-module throughout the maintenance process, effectively avoiding equipment failures and performance degradation problems caused by position deviations, improving the maintenance quality of the converter valve equipment, extending the service life of the equipment, and reducing the maintenance cost of the equipment.

[0124] The connecting rod 32 is connected to the converter valve sub-module by a threaded connection. The connecting rod 32 has internal threads, and the sub-module has external threads, and they are connected by threads.

[0125] In the present invention, the sub-module is towed onto the transfer platform 3 by using the docking device 2 and the transfer platform 3, and the sub-module and the transfer platform 3 are hoisted to the ground for maintenance by the hoisting system 4. The entire operation and maintenance process is completed outside the converter valve, and the operation and maintenance personnel do not enter the valve tower. The converter valve sub-module is installed on the guide rail sliding table 12 structure, and the sliding table 12 can carry the sub-module to slide on the guide rail. Grease lubricant is not used in the whole structure. The docking device 2 can be reliably installed on the converter valve without using fasteners. The alignment structure 22 can ensure the accurate docking of the guide rail on the docking device 2 and the guide rail at the bottom of the converter valve sub-module, and has a locking function. The transmission mechanism in the transfer platform 3 can convert the rotational motion into a linear motion and can change the direction of the power input through a commutator. After the converter valve sub-module is towed onto the transfer platform 3, the guide block on the sub-module will slide into the guide groove in the hoisting assembly, and the center of gravity and the hoisting point of the sub-module are on the same vertical line, ensuring that the sub-module will not tilt.

[0126] In another embodiment, when it is necessary to maintain and replace the converter valve sub-module, first, the operation and maintenance personnel manually align the second guide rail 21 with the first guide rail 11 on the converter valve sub-module. The docking part of the first guide rail 11 is a hollow steel pipe, and the docking part of the docking device 2 is provided with an insertion structure matching the hollow steel pipe, and the two are fixedly connected. The converter valve sub-module is migrated onto the second guide rail 21 through the traction system on the docking device 2, calibrated through the alignment structure, and the converter valve sub-module is fixed to the docking device 2 through the locking structure.

[0127] When using the hoisting system 4 to move the transfer platform above the converter valve sub-module to be maintained and lower it to the horizontal line of the docking device 3, the operation and maintenance personnel manually align the third guide rail 31 with the second guide rail 21, dock the transfer platform 3 with the docking device 2 through the tapered pin on the transfer platform 3, connect it to the converter valve sub-module through the connecting rod, and then migrate the converter valve sub-module onto the third guide rail 31 through the transmission system 33. When the center of gravity and the hoisting point of the converter valve sub-module are on the same vertical line, the guide block on the converter valve sub-module slides into the upper guide groove, and the locking device is used to lock the transmission system.

[0128] The above are only embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention pending approval.

Claims

1. A converter valve submodule maintenance tool, characterized in that: include: A guide rail slide structure (1), a docking device (2), a transfer platform (3) and a lifting system (4); the guide rail slide structure (1) is arranged at the bottom of the converter valve, and the converter valve submodule is fixed on the guide rail slide structure (1); The transfer platform (3) is detachably connected to the lifting system (4); When in the working condition of hoisting the converter valve submodule, the guide rail slide structure (1) and the transfer platform (3) are connected by rail via a docking device (2).

2. A converter valve submodule maintenance tool as claimed in claim 1, characterized in that: The guide rail and slide structure (1) comprises a first guide rail (11) and a slide (12) that are slidably matched, the first guide rail (11) being fixedly arranged on the converter valve, and the slide (12) being one or more; the converter valve submodules are respectively fixedly arranged on each slide (12).

3. A converter valve submodule maintenance tool as claimed in claim 2, characterized in that: The docking device (2) comprises: a second guide rail (21), a traction system arranged at a side end of the second guide rail (21) and traction-driving the converter valve submodule from the first guide rail (11) to the second guide rail (21), an alignment structure (22) arranged at a front end of the second guide rail (21) and used for calibrating the first guide rail (11) and the second guide rail (21), and a locking structure arranged at a front end of the second guide rail (21) and locking the connection between the first guide rail (11) and the second guide rail (21); When in the working condition of hoisting the converter valve submodule, the docking device (2) moves to the vicinity of the guide rail slide structure (1) under the converter valve submodule to be replaced, and one end of the second guide rail (21) docks with one end of the first guide rail (11).

4. A converter valve submodule maintenance tool as claimed in claim 3, characterized in that: The transfer platform (3) comprises: a rectangular bottom plate, the upper surface of the rectangular bottom plate is provided with a third guide rail (31), the side end of the third guide rail (31) is provided with a transmission system (33) for transmitting the converter valve submodule from the second guide rail (21) to the third guide rail (31), and the front end of the rectangular bottom plate is provided with a tapered pin connecting the second guide rail (21) and the transfer platform (3) and a connecting rod (32) for fixing the connection between the second guide rail (21) and the third guide rail (31); One end of the third guide rail (31) is butted against the other end of the second guide rail (21), and the slide table (12) slides on the third guide rail (31).

5. A converter valve submodule maintenance tool as claimed in claim 3, characterized in that: The alignment structure (22) comprises an upper clamping plate fixedly arranged above the second guide rail (21), and a lower clamping plate fixedly arranged below the second guide rail (21); The upper clamping plate and the lower clamping plate fix the first guide rail (11) between the upper and lower parts, and at this time, the first guide rail (11) and the second guide rail (21) are in the same plane.

6. A converter valve submodule maintenance tool as claimed in claim 4, characterized in that: The transfer platform (3) further comprises: a locking structure arranged at the front end of the third guide rail (31) and locking the connection between the second guide rail (21) and the third guide rail (31).

7. A converter valve submodule maintenance tool as claimed in claims 3 and 6, characterized in that: The locking structure is a threaded locking structure, and the locking structure is threadedly connected to the converter valve submodule.

8. A converter valve submodule maintenance tool as claimed in claim 1, characterized in that: The hoisting system (4) comprises: a hoisting rod assembly (41) detachably connected to the transfer platform (3), and a lifting device (42) arranged on the upper part of the hoisting rod assembly (41).

9. A converter valve submodule maintenance tool as claimed in claim 2, characterized in that: The slide (12) comprises a slide body (121) and a bearing system (122); the slide body (121) is fixedly mounted on the converter valve submodule, and the bearing system (122) is slidably connected to the first guide rail (11).

10. A converter valve submodule maintenance tool as claimed in claim 4, characterized in that: The transmission system (33) comprises: at least one power input system (331) arranged at the side end of the transfer platform (3), at least one converter (332) connected to the power input system (331), at least one optical axis (333) arranged perpendicular to the converter (332), and a ball screw nut (334) connected to the optical axis (333).

11. A converter valve submodule maintenance tool as claimed in claim 8, characterized in that: The hanging rod assembly (41) comprises: a plurality of hanging rods (411) and at least one upper guide groove (412); One end of the hoisting rod (411) is connected to the transfer platform (3), and the other end is connected to the lifting device (42); the upper guide groove (412) is fixed at the connection between the hoisting rod (411) and the lifting device (42).

12. A maintenance method for a converter valve submodule maintenance tool as claimed in any one of claims 1 to 11, characterized in that: The following steps are involved: The guide rail slide structure (1), the docking device (2) and the transfer platform (3) at the bottom of the converter valve submodule to be replaced are sequentially connected; The converter valve submodule that needs to be replaced is moved from the guide rail slide structure (1) to the transfer platform (3) through the docking device (2); The converter valve submodule to be replaced is hoisted to the ground by the hoisting system (4); The converter valve submodule to be installed is hoisted onto the guide rail slide structure (1) by means of the hoisting system (4); The transfer platform (3), the docking device (2) and the guide rail slide structure (1) at the bottom of the converter valve submodule to be installed are sequentially connected; The converter valve submodule to be installed is moved from the transfer platform (3) to the guide rail slide structure (1) through the docking device (2).

13. The method according to claim 12, characterized in that The guide rail slide structure (1), the docking device (2) and the transfer platform (3) which are sequentially connected to the lower part of the converter valve submodule to be replaced include: Connecting the guide rail slide structure (1) to the docking device (2) by rail; Using the lifting system (4) to drive the transfer platform (3) to move to the guide rail slide structure (1) below the converter valve submodule that needs to be replaced; The docking device (2) is connected to the transfer platform (3) track.

14. The method according to claim 12, characterized in that The guide rail slide structure (1) sequentially connected to the transfer platform (3), the docking device (2) and the lower part of the converter valve submodule to be installed comprises: Using the hoisting system (4) to drive the transfer platform (3) to move to the guide rail slide structure (1) below the converter valve submodule to be installed; Connecting the transfer platform (3) to the track of the docking device (2); The docking device (2) is connected to the guide rail slide structure (1) by rail.

15. The method according to claim 12, characterized in that The method of moving the converter valve submodule to be replaced from the guide rail slide structure (1) to the transfer platform (3) through the docking device (2) comprises: Based on the traction force of the traction system, the converter valve submodule that needs to be replaced is moved from the guide rail slide structure (1) to the docking device (2); Based on the transmission force of the transmission system (33), the converter valve submodule that needs to be replaced is moved from the docking device (2) to the transfer platform (3).

16. The method according to claim 12, characterized in that The method of moving the converter valve submodule to be installed from the transfer platform (3) to the guide rail slide structure (1) through the docking device (2) comprises: Based on the transmission force of the transmission system (33), the converter valve submodule to be installed is moved from the transfer platform (3) to the docking device (2); Based on the traction force of the traction system, the converter valve submodule to be installed is moved from the docking device (2) to the guide rail slide structure (1).

17. The method according to claim 12, characterized in that The transfer platform (3) is connected to the docking device (2) via a conical pin, and the converter valve submodule to be replaced is connected to the transfer platform (3) via a connecting rod (32).

18. The method according to claim 12, characterized in that When the converter valve submodule to be replaced is in the working condition of hoisting, when the guide block of the converter valve submodule to be replaced completely slides into the upper guide groove (412), the converter valve submodule to be replaced is locked with the hoisting rod assembly (41).

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