GCB arc extinguish chamber disassembly maintenance tool system and maintenance method thereof

Abstract

The invention provides a GCB arc extinguish chamber disassembly maintenance tool system and a maintenance method thereof. The GCB arc extinguish chamber disassembly maintenance tool system comprises an arc extinguish chamber transfer tool, a static contact transfer tool, a service life measurement tool, a moving arc contact fixing tool, a moving arc contact supporting cover disassembly tool and a guide piston disassembly tool. The arc extinguish chamber transferring tool is used for integrally transferring a GCB arc extinguish chamber and transferring a moving contact module, the static contact transferring tool is used for transferring a static contact module, the service life measuring tool is used for measuring the height of a moving arc contact in the moving contact module, the moving arc contact fixing tool is used for installing and fixing a moving arc contact unit, and the moving contact fixing tool is used for installing and fixing the moving arc contact unit. The moving arc contact supporting cover dismounting tool is used for dismounting a supporting cover on a moving arc contact unit, and the guide piston dismounting tool is used for dismounting a guide piston after a moving arc contact is fixed. A set of maintenance tool is provided through the tool system, and a specific and practical maintenance method is combined, so that efficient, simple, convenient and reliable disassembly maintenance of the GCB arc extinguish chamber is realized.

Description

Technical Field

[0001] The invention relates to the technical field of disassembly, overhaul and maintenance of a GCB arc extinguishing chamber, and in particular to a disassembly and overhaul tooling system for a GCB arc extinguishing chamber and an overhaul method thereof. Background Art

[0002] GCB, or generator output circuit breaker, is an important device used to cut off or connect high-voltage circuits in power systems. As its core component, the GCB arc extinguishing chamber is mainly responsible for extinguishing the arc during the circuit breaker operation to ensure safe circuit disconnection. With the expansion of the scale of power systems and the improvement of operating requirements, higher requirements are placed on the performance and reliability of GCB arc extinguishing chambers. Therefore, regular inspection and maintenance of GCB arc extinguishing chambers to ensure their normal operation has become an important task in the field of power equipment maintenance.

[0003] The GCB arc extinguishing chamber has a complex structure and many parts. It is difficult to disassemble and assemble the GCB arc extinguishing chamber at the maintenance site, and the maintenance operator's skill level is high. At the same time, considering the complex on-site environment, limited on-site communication, lack of professional tooling and standard operating procedures to guide the operation, it will seriously affect the maintenance efficiency and quality, all of which may affect the performance and service life of the arc extinguishing chamber after maintenance. Therefore, the present invention proposes an efficient, simple and reliable GCB arc extinguishing chamber disassembly and maintenance tooling system and maintenance method, which is of great significance to improving the operation safety and economy of the power system.

[0004] Although, Chinese patent document CN101393805A, published (announcement) date: 2009.03.25, discloses a field maintenance method for SF6 switches for electric power, through testing, inspection, SF6 gas recovery and treatment, removal of the connecting pipelines between the body and the mechanism, disassembly of the switch body and various components in the mechanism, the body is disassembled and repaired in the on-site dust-free purification workshop and the equipment on-site maintenance workshop for arc extinguishing chamber phase by phase disassembly and maintenance, disassembly and maintenance of the operating mechanism, mechanical property test and insulation and withstand voltage test, on-site restoration, installation and overhaul post-test, protection wiring, transmission test to complete the on-site maintenance, its characteristics are to solve the problems of long power outage time, high transportation risk and high cost caused by returning sulfur hexafluoride switches to the factory for maintenance; its shortcomings are: the document does not explain the specific method of maintenance, the whole method is very simple, and cannot achieve the effect of on-site implementation. Summary of the invention

[0005] In order to solve the current technical problems, the main purpose of the present invention is to provide a GCB arc chamber dismantling and maintenance tooling system and a maintenance method thereof. A set of maintenance tooling is provided through the tooling system, and combined with a specific and practical maintenance method, efficient, simple and reliable dismantling and maintenance of the GCB arc chamber can be achieved, which is of great significance to improving the operating safety and economy of the power system.

[0006] The technical solution adopted by the present invention is: a GCB arc extinguishing chamber disassembly and maintenance tooling system, including an arc extinguishing chamber transfer tooling, a static contact transfer tooling, a life measurement tooling, a moving arc contact fixing tooling, a moving arc contact support cover removal tooling and a guide piston removal tooling; the arc extinguishing chamber transfer tooling is used to transport the GCB arc extinguishing chamber as a whole and to transport the moving contact module, the static contact transfer tooling is used to transport the static contact module, the life measurement tooling is used to measure the height of the moving arc contact in the moving contact module, the moving arc contact fixing tooling is used to install and fix the moving arc contact unit, the moving arc contact support cover removal tooling is used to remove the support cover on the moving arc contact unit, and the guide piston removal tooling is used to remove the guide piston after fixing the moving arc contact.

[0007] A GCB arc extinguishing chamber disassembly and maintenance method adopts the GCB arc extinguishing chamber disassembly and maintenance tooling system, and the maintenance method comprises the following steps: S1, GCB arc chamber gas recovery operation; S2. Lift the GCB arc extinguishing chamber by the arc extinguishing chamber transfer tooling, remove the static contact module, and transfer the removed static contact module by the static contact transfer tooling; S3, removal of the broken insulator; S4. Measuring the height of the moving arc contact in the moving contact module under different conditions by using a life measuring tool to determine the service life of the moving arc contact and calculate the stroke of the moving arc contact; S5. Inspection of explosion-proof membrane removal; S6, dismantling the transmission mechanism module; S7, dismantling, inspecting and replacing the seal of the static contact module; wherein the electrical life of the static arc contact of the static contact module is measured and determined; S8, dismantling, inspecting and replacing the seal of the moving contact module; wherein, the moving arc contact unit is supported and fixed by the moving arc contact fixing tool, the support cover on the moving arc contact unit is removed by the moving arc contact support cover removal tool, the moving arc contact is limited and fixed by the guide piston removal tool, and then the guide piston is removed and separated; S9, dismantling, inspection and seal replacement of transmission mechanism module; S10, GCB arc extinguishing chamber reinstallation; S11, GCB arc extinguishing chamber gas recovery operation.

[0008] In S1, the GCB arc chamber gas recovery operation includes the following steps: Gas recovery: Before gas recovery, measure and record the gas pressure in the GCB arc extinguishing chamber, and then use the gas recovery device to recover the SF6 gas in the GCB arc extinguishing chamber; Breaking vacuum in the arc extinguishing chamber: Install a joint at the gas pipe interface of the GCB arc extinguishing chamber, push open the check valve on the GCB arc extinguishing chamber, and allow dry air to enter the GCB arc extinguishing chamber through the joint until the air pressure in the GCB arc extinguishing chamber is the same as the atmospheric pressure.

[0009] In S4, during measurement, the moving contact module is placed steadily on the workbench with the moving arc contact facing upwards, the moving contact module is opened and closed with an opening and closing wrench, the life measurement tooling is placed on the moving contact module, the heights L1 and L2 of the moving arc contacts of the moving contact module at the opening and closing positions are measured, and the stroke L3 of the moving arc contacts is obtained by subtracting L1-L2; wherein, when L1 and L2 are less than the threshold value, it is determined that the moving arc contacts have reached the end of their service life and need to be replaced.

[0010] In S6, use the opening and closing wrench to rotate the moving contact module to the opening position, use the hexagonal wrench to remove the fixing bolts on the end cover of the transmission mechanism module, install the lifting ears on the end cover plate of the transmission mechanism module to lift it, remove the transmission mechanism module, and then remove the supporting insulator.

[0011] In S7, the disassembly, inspection and seal replacement of the stationary contact module includes the following steps: Measurement of the electrical life of the static arc contact of the static contact module: Use a micrometer to measure the diameter of the static arc contact nozzle. If the diameter is greater than the threshold, it is judged that the static arc contact has reached the end of its service life and needs to be replaced; Removal of static arc contact: Remove the fixing bolts between the static arc contact and the static contact module, and lift the static arc contact as a whole and place it in the maintenance area; Inspection of static arc contacts: Inspect the surface of the static arc contacts and use a scouring pad to clean any traces of ablation, and replace the seal of the bottom cover of the static arc contacts; Whether to replace the static arc contact with a new one is determined based on the measurement results of the ablation of the static arc contact nozzle. If not, the static arc contact will be disassembled into various parts, the internal arc extinguishing guide tube of the static arc contact will be replaced, and the nozzle and plum blossom contact fingers on the static arc contact with signs of ablation will be polished and cleaned with a scouring pad, and then reinstalled into an integrated static contact module.

[0012] In S8, the disassembly, inspection and seal replacement of the moving contact module includes the following steps: Removal of the moving arc contact unit: switch the moving contact module to the closing position, remove the fixing bolts between the moving arc contact unit and the moving contact module, and lift the moving arc contact unit out and install it on the moving arc contact fixing fixture; Dismantle the moving arc contact unit: install the moving arc contact support cover disassembly tooling on the moving arc contact fixing tooling; first use a hot air gun to heat along the thread connecting the support cover and the moving arc contact housing to melt the internal thread glue at the thread, and after the thread glue melts, install the fixing seat and screwing piece of the moving arc contact support cover disassembly tooling on the end of the moving arc contact housing, one end of the screwing piece is clamped and fixed with the support cover, and the other end passes through the center hole on the fixing seat, clamp the wrench on the end of the screwing piece extending out of the fixing seat, rotate the support cover to disassemble, and finally remove the moving arc contact support cover disassembly tooling, and then disassemble and remove the internal parts; Moving arc contact removal: After one end of the guide piston removal tool is inserted into the moving arc contact, the other end of the moving arc contact housing is bolted and fixed. At this time, the inner polygonal groove of the guide piston removal tool is inserted into the polygonal step on the moving arc contact. The positioning pin of the guide piston is heated with a hot air gun, and the positioning pin is removed with a tool. Then, a fork-shaped wrench is inserted into the ear seat at the tail of the guide piston, and the fork-shaped wrench is turned to loosen the guide piston, and the guide piston is taken out. Finally, the moving arc contact is taken out while removing the guide piston removal tool; Dismantle and inspect the moving arc contact unit and replace the seal: Check the main contact fingers and arcing contact fingers of the moving arc contact unit contact finger circuit part, and replace them one by one if they are worn; measure the ablation of the moving main contact nozzle, and decide whether to replace the arc extinguishing part of the moving main contact with a new one based on the measurement results and the circuit breaker breaking situation; if not replaced, use a scouring pad to clean the nozzle and plum blossom contact fingers on the moving arc contact with ablation marks, replace the sealing ring, and reinstall the moving arc contact unit; Finally, reassemble it into an integrated moving contact module.

[0013] In S9, the transmission module disassembly, inspection and seal replacement include the following steps: Use the opening and closing wrench to turn the moving contact module to the opening position, use the hexagonal wrench to remove the fixing bolts on the end cover of the transmission mechanism module, install the lifting lugs on the end cover of the transmission mechanism module to lift it, use the bridge crane to slightly force the end cover, and remove the bottom transmission mechanism; Disassemble the bottom transmission mechanism, replace the axle pin of the transmission mechanism main shaft, replace the sealing ring and seal between the bottom transmission mechanism main shaft and the cover plate, replace the seal on the bottom transmission mechanism cover plate, replace the connecting arm seal and axle pin outside the bottom transmission mechanism cover plate, and then reinstall the bottom transmission mechanism as a whole.

[0014] In S10, the GCB interrupter reinstallation includes the following steps: Reinstall the moving contact module: After reinstalling the moving contact module transmission system, turn the moving contact module 180 degrees, connect the moving contact module transmission system with the main shaft of the bottom transmission mechanism in the transmission mechanism module, and reinstall the explosion-proof membrane; Reinstall the transmission mechanism module: replace the seals on both sides of the base insulator, first reinstall the base insulator onto the moving contact module, then replace the rotating insulation plate inside the base insulator, and finally reinstall the transmission mechanism module as a whole; Break insulator: Replace the seal of the heating chamber inside the break insulator, replace the seals on both sides of the break insulator, and install the break insulator on the moving contact module; Reinstall the static contact module: rotate the static contact module as a whole back onto the broken insulator.

[0015] In S11, the GCB arc chamber gas recovery operation includes the following steps: Vacuuming and pressure holding test: connect the gas pipe of the gas operation vehicle to the GCB arc chamber charging interface and the vacuum pump respectively, turn on the vacuum pump, start vacuuming, and when the vacuum degree in the arc chamber is 133Pa, continue vacuuming for 30 minutes, then turn off the vacuum pump, close the gas pipe valve on the vacuum pump, read the vacuum degree A after 30 minutes of rest, and read the vacuum degree B after an interval of 5 hours. If BA≤67Pa, it is considered that the sealing performance is good; Fill the arc extinguishing chamber with SF6 gas: Use an SF6 gas analyzer to test the new SF6 gas in the SF6 gas cylinder. It can be used only after the test result is qualified. Connect the pressure reducing valve and the gas pipe to the SF6 gas cylinder, and adjust the pressure value of the pressure reducing valve outlet to 0.1MPa; Open the valve of the SF6 gas cylinder, and after the SF6 gas has exhausted all the air in the air pipe, connect the other side of the air pipe to the gas nozzle of the GCB arc extinguishing chamber, and fill the GCB arc extinguishing chamber with new SF6 gas to 0.1MPa; after the filling is completed, close the valves of the SF6 gas cylinder and the pressure reducing valve, and remove the air pipe connection with the SF6 gas cylinder; wrap each sealing part with plastic film for 5 hours, measure the SF6 gas content, and the volume fraction is not more than 15mol / L to pass.

[0016] The present invention has the following beneficial effects: According to the complex environment of the GCB site and the actual needs of on-site maintenance, the present invention proposes a GCB arc extinguishing chamber disassembly and maintenance tooling system and its maintenance method. The arc extinguishing chamber transfer tooling is used to safely and efficiently transfer the three-phase GCB arc extinguishing chamber to be repaired from the installation and operation position to the area to be repaired; the transfer tooling is used to realize the overall disassembly, overturning, hoisting and transportation of the GCB arc extinguishing chamber, the moving contact module and the static contact module; the life measurement tooling measures and quantifies the arc extinguishing ablation degree of the moving arc contact in the moving contact module, which is convenient for maintenance technicians to more accurately judge the electrical life of the entire circuit breaker; the moving arc contact fixing tooling can firmly fix the moving arc contact unit, which is convenient for disassembling and assembling various components inside the arc contact unit; the guide piston removal tooling is used to remove the guide piston after fixing the moving arc contact, etc. The present invention proposes to adopt a series of specific tooling to implement the dismantling and maintenance of the GCB arc extinguishing chamber, and also describes in detail the operating steps of the dismantling and maintenance of the GCB arc extinguishing chamber, from the gas recovery operation of the GCB arc extinguishing chamber, the dismantling, lifting and transportation of the GCB arc extinguishing chamber, the decomposition of the large modules of the GCB arc extinguishing chamber, the further detailed dismantling of each module of the GCB arc extinguishing chamber, the inspection and treatment of each component, the sealing and spare parts replacement, the overall reinstallation and gas recovery operation, etc., the tooling required for the maintenance of each component, as well as the matters needing attention and the maintenance technical details during the maintenance are described in detail. The entire maintenance method, operation steps and process standards are relatively clear, feasible and operable, and the description is relatively detailed and complete. The system-level maintenance method of the tooling provided can be used to efficiently, simply and reliably dismantle and repair the GCB arc extinguishing chamber, which is of great significance for improving the operating safety and economy of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the GCB arc extinguishing chamber installed on the transfer base.

[0019] Figure 2 This is a schematic diagram of the structure of the arc extinguishing chamber transfer tooling.

[0020] Figure 3 This is a schematic diagram of the structure of the static contact transfer tooling.

[0021] Figure 4 This is a schematic diagram of the structure of the life measurement tooling.

[0022] Figure 5This is a schematic diagram of the structure of the moving arc contact fixing tooling.

[0023] Figure 6 Schematic diagram of the state of removing the support cover using the moving arc contact support cover removal tool after the moving arc contact unit is installed and fixed on the moving arc contact fixing tool.

[0024] Figure 7 Schematic diagram of the state of removing the guide piston using the guide piston removal tool after the moving arc contact unit is installed and fixed to the moving arc contact fixing tool.

[0025] Figure 8 This is a schematic diagram of the state after the moving arc contact and the guide piston are disassembled by the guide piston removal tool.

[0026] Fig. 9 This is a schematic diagram of the GCB arc extinguishing chamber being lifted by the static contact transfer tooling.

[0027] Fig.10 This is a schematic diagram of the state of lifting the static contact module by the static contact transfer tooling.

[0028] Fig.11 This is a schematic diagram of the state of measuring the service life of the moving arc contact using the life measurement tool.

[0029] Reference numerals: Transfer base 10; Arc extinguishing chamber transfer tooling 20, first lifting lug beam 21, first steel wire rope 22, hanging plate 23, connecting hole 231, adjusting hole 232, adjusting seat 233; Static contact transfer tooling 30, second lifting lug beam 31, second steel wire rope 32, first connecting block 33, second connecting block 34; Life measurement tool 40, support plate 41, support column 42, measuring hole 43, depth caliper 44; Moving arc contact fixing fixture 50, bottom frame 51, V-shaped groove seat 52, fixing plate 53, fixing hole 54, operating space 55; Moving arc contact support cover disassembly tool 60, fixing seat 61, twisting piece 62; Guide piston removal tool 70, inner polygonal groove 71, GCB arc extinguishing chamber 100, static contact module 110, break insulator 120, moving contact module 130, explosion-proof membrane 140, transmission mechanism module 150, moving arc contact unit 160, moving arc contact housing 161, moving arc contact 162, support cover 163, polygonal step 164, guide piston 165. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1 The GCB arc extinguishing chamber includes a static contact module 110, a break insulator 120, a moving contact module 130, an explosion-proof membrane 140 and a transmission mechanism module 150. A moving arc contact unit 160 is also installed in the moving contact module 130. The arc contact unit 160 includes a moving arc contact housing 161 and a moving arc contact 162 installed in the arc contact housing 161. A support cover 163 is installed at one end of the moving arc contact 162, and a guide piston 165 is threadedly connected to the other end.

[0032] like Figure 2-8 As shown, the present invention provides a GCB arc extinguishing chamber disassembly and maintenance tooling system, including an arc extinguishing chamber transfer tooling 20, a static contact transfer tooling 30, a life measurement tooling 40, a moving arc contact fixing tooling 50, a moving arc contact support cover removal tooling 60 and a guide piston removal tooling 70; the arc extinguishing chamber transfer tooling 20 is used to transport the GCB arc extinguishing chamber 100 as a whole and to transport the moving contact module 130, the static contact transfer tooling 30 is used to transport the static contact module 110, the life measurement tooling 40 is used to measure the height of the moving arc contact 162 in the moving contact module 130, the moving arc contact fixing tooling 50 is used to install and fix the moving arc contact unit 160, the moving arc contact support cover removal tooling 60 is used to remove the support cover 163 on the moving arc contact unit 160, and the guide piston removal tooling 70 is used to remove the guide piston 165 after fixing the moving arc contact 162.

[0033] exist Figure 2 In the figure, an arc extinguishing chamber transfer tool 20 is shown, which includes a first lifting ear beam 21, a first steel wire rope 22, a hanging plate 23, a connecting hole 231, an adjusting hole 232 and an adjusting seat 233. The first lifting ear beam 21 is used to be hooked and connected with the hook of the bridge crane. Two first steel wire ropes 22 are respectively connected to the two ends of the first lifting ear beam 21, and the lower ends of the two first steel wire ropes 22 are respectively connected to the adjusting seats 233. Two connecting holes 231 for bolting the moving contact module 130 are provided on the hanging plate 23. A plurality of adjusting holes 232 are provided on the hanging plate 23 between the two connecting holes 231. The adjusting seat 233 is connected with the adjusting holes 232 at different positions, thereby realizing the horizontal and vertical lifting of the GCB arc extinguishing chamber 100 and the moving contact module 130.

[0034] exist Figure 3In the figure, a static contact transfer tool 30 is shown, which includes a second lifting ear beam 31, a second steel wire rope 32, a first connecting block 33 and a second connecting block 34. The second lifting ear beam 31 is used to be hooked and connected to the hook of the bridge crane. The two second steel wire ropes 32 are respectively connected to the two ends of the second lifting ear beam 31. The lower ends of the two second lifting ear beams 31 are respectively connected to the first connecting block 33 and the second connecting block 34. The first connecting block 33 and the second connecting block 34 are respectively bolted to the connecting holes on both sides of the static contact module 110.

[0035] exist Figure 4 In the figure, a life measurement tool 40 is shown, which includes a support plate 41, a support column 42, a measuring hole 43 and a depth caliper 44; three support columns 42 are evenly distributed in a ring at the lower end of the support plate 41, and a measuring hole 43 is provided in the center of the support plate 41. The measuring end of the depth caliper 44 passes through the measuring hole 43 and abuts against the top of the moving arc contact 162, thereby measuring the height of the moving arc contact 162 when it is extended or retracted.

[0036] exist Figure 5 , a moving arc contact fixing tool 50 is shown, the moving arc contact fixing tool 50 comprises a bottom frame 51, a V-shaped groove seat 52, a fixing plate 53 and a fixing hole 54. Two fixing plates 53 are installed at one end of the upper side of the bottom frame 51, and a V-shaped groove seat 52 is installed at the other end. The two fixing plates 53 are respectively provided with fixing holes 54, and an operating space 55 is left between the two fixing plates 53. Figure 6 The V-shaped groove seat 52 is used to support the moving arc contact 162, and the two fixing plates 53 are respectively connected with the end bolts supporting the moving arc contact 162.

[0037] exist Figure 6 In the figure, a moving arc contact support cover disassembly tool 60 is also shown, and the moving arc contact support cover disassembly tool 60 includes a fixing seat 61 and a twisting member 62. The two ends of the fixing seat 61 are used to be bolted to the two fixing plates 53 of the moving arc contact fixing tool 50. A limiting hole is provided in the middle of the fixing seat 61. A positioning column is provided at one end of the twisting member 62. The positioning column is used to be inserted into the reserved hole of the support cover 163. The other end of the twisting member 62 passes through the limiting hole. When in use, the twisting member 6 is twisted by a wrench to extend one end of the limiting hole, thereby disassembling the support cover 163. The twisting member 62 is supported by the fixing seat 61. When twisting, it can prevent the twisting member 62 from tilting and causing the support cover 163 to deform.

[0038] exist Figure 6 , 7In the figure, a guide piston removal tool 70 is shown. The guide piston removal tool 70 has a T-shaped structure. Specifically, a baffle is fixedly connected to one end of the sleeve. The baffle is used to be connected with the end bolt of the moving arc contact 162. The sleeve is inserted into the outside of the moving arc contact 162, and the inner polygonal groove 71 at the other end of the sleeve cooperates with the polygonal step 164 on the moving arc contact 162 to limit the position, so that the moving arc contact 162 does not rotate when the guide piston 165 is removed.

[0039] Embodiment 2: See also Figure 1 , 6 -11, a GCB arc extinguishing chamber disassembly and maintenance method, using the GCB arc extinguishing chamber disassembly and maintenance tooling system, the maintenance method comprises the following steps: S1, GCB arc extinguishing chamber 100 gas recovery operation; S2, lifting the GCB arc extinguishing chamber 100 by the arc extinguishing chamber transfer tool 20, removing the static contact module 110, and transferring the removed static contact module 110 by the static contact transfer tool 30; S3, the broken insulator 120 is removed; S4, measuring the height of the moving arc contact 162 in the moving contact module 130 in different states by the life measuring tool 40, so as to determine the service life of the moving arc contact 162 and calculate the stroke of the moving arc contact 162; S5. Remove and inspect explosion-proof membrane 140; S6, dismantling the transmission mechanism module 150; S7, dismantling, inspecting and sealing the static contact module 110; wherein the electrical life of the static arc contact of the static contact module 110 is measured and determined; S8, dismantling, inspecting and replacing the seal of the moving contact module 130; wherein, the moving arc contact unit 160 is supported and fixed by the moving arc contact fixing tool 50, the support cover 163 on the moving arc contact unit 160 is removed by the moving arc contact support cover removal tool 60, the moving arc contact 162 is limited and fixed by the guide piston removal tool 70, and then the guide piston 165 is disassembled and separated; S9, dismantling, inspecting and replacing the seal of the transmission mechanism module 150; S10, GCB arc extinguishing chamber 100 reinstalled; S11, GCB arc extinguishing chamber 100 gas recovery operation.

[0040] The above method can realize efficient, simple and reliable dismantling and maintenance of the GCB arc extinguishing chamber, which is of great significance to improving the operational safety and economy of the power system.

[0041] In this embodiment, the gas recovery operation of the GCB arc extinguishing chamber 100 includes the following steps: Gas recovery: Before gas recovery, the gas pressure in the GCB arc extinguishing chamber 100 is measured and recorded, and then the SF6 gas in the GCB arc extinguishing chamber 100 is recovered cleanly through the gas recovery device; Breaking vacuum in the arc extinguishing chamber: Install a joint at the air pipe interface of the GCB arc extinguishing chamber 100, push open the check valve on the GCB arc extinguishing chamber 100, and allow dry air to enter the GCB arc extinguishing chamber 100 through the joint until the air pressure in the GCB arc extinguishing chamber 100 is the same as the atmospheric pressure.

[0042] Before S1, the steps of setting up the cleanroom maintenance room of GCB arc extinguishing chamber are also included. Specifically, the cleanroom maintenance room has sufficient lighting, good ventilation, temperature not less than 5℃, and humidity not more than 80%. The power capacity of the cleanroom is sufficient, and a conspicuous signboard "Maintenance area, no entry for unauthorized personnel" is set at the boundary of the cleanroom maintenance area.

[0043] Remove the CGB arc extinguishing chamber 100 to be repaired from the generator circuit breaker body, see Figure 1 , transported to the maintenance clean room through the dedicated transfer base 10, and the CGB arc extinguishing chamber 100 is turned over and placed at the maintenance site using the arc extinguishing chamber transfer tooling 20, see Fig. 9 After that, the gas recovery operation of the GCB arc extinguishing chamber 100 needs to be carried out.

[0044] In this embodiment, see Figure 4 , 11 In S4, during measurement, the moving contact module 130 is placed steadily on the workbench with the moving arc contact 162 facing upward, and the moving contact module 130 is opened and closed with an opening and closing wrench. The life measurement tooling 40 is placed on the moving contact module 130, and the heights L1 and L2 of the moving arc contact 162 of the moving contact module 130 at the opening and closing positions are measured, and the stroke L3 of the moving arc contact 162 is obtained by subtracting L1-L2; wherein, when L1 and L2 are less than the threshold value, it is determined that the moving arc contact 162 has reached the end of its service life and needs to be replaced.

[0045] During measurement, the three support columns 42 are stably placed on the moving contact module 130 , and the measuring end of the depth gauge 44 passes through the hole on the support plate 41 and abuts against the top of the moving arc contact 162 .

[0046] In this embodiment, in S6, the moving contact module 130 is rotated to the open position using a closing and opening wrench, the fixing bolts on the end cover of the transmission mechanism module 150 are removed using an Allen wrench, a lifting lug is installed on the end cover plate of the transmission mechanism module 150 to lift it, the transmission mechanism module 150 is removed, and then the supporting insulator is removed.

[0047] In this embodiment, disassembly, inspection and seal replacement of the stationary contact module 110 include the following steps: Measurement of the electrical life of the static arc contact of the static contact module 110: Use a micrometer to measure the diameter of the static arc contact nozzle. If the diameter is greater than a threshold value, it is determined that the static arc contact has reached the end of its service life and needs to be replaced. Removal of the static arc contact: remove the fixing bolts between the static arc contact and the static contact module 110, and hoist the static arc contact as a whole and place it in the maintenance area; Inspection of static arc contacts: Inspect the surface of the static arc contacts and use a scouring pad to clean any traces of ablation, and replace the seal of the bottom cover of the static arc contacts; Whether to replace the static arc contact with a new one is determined based on the measurement results of the ablation of the static arc contact nozzle. If not, the static arc contact is disassembled into various parts, the internal arc extinguishing guide tube of the static arc contact is replaced, and the nozzle and plum blossom contact fingers on the static arc contact with signs of ablation are polished and cleaned with a scouring pad, and then reassembled into an integrated static contact module 110.

[0048] In this embodiment, disassembly, inspection and seal replacement of the moving contact module 130 include the following steps: Removing the moving arc contact unit 160: switching the moving contact module 130 to the closing position, removing the fixing bolts between the moving arc contact unit 160 and the moving contact module 130, and lifting the moving arc contact unit 160 out and installing it on the moving arc contact fixing fixture 50; Dismantle the moving arc contact unit 160: install the moving arc contact support cover disassembly tool 60 onto the moving arc contact fixing tool 50; first use a hot air gun to heat along the thread connecting the support cover 163 and the moving arc contact housing 161 to melt the internal thread glue at the thread, and after the thread glue melts, install the fixing seat 61 and the screwing piece 62 of the moving arc contact support cover disassembly tool 60 at the end of the moving arc contact housing 161, one end of the screwing piece 62 is clamped and fixed with the support cover 163, and the other end passes through the center hole on the fixing seat 61, clamp the wrench on the end of the screwing piece 62 extending out of the fixing seat 61, rotate and disassemble the support cover 163, and finally remove the moving arc contact support cover disassembly tool 60, and then disassemble and remove the internal parts; Removal of the moving arc contact 162: After one end of the guide piston removal tool 70 is inserted into the moving arc contact 162, the other end of the moving arc contact housing 161 is bolted and fixed. At this time, the inner polygonal groove 71 of the guide piston removal tool 70 inserted into one end of the moving arc contact 162 is inserted into the polygonal step 164 on the moving arc contact 162, and the positioning pin of the guide piston 165 is heated with a hot air gun, and the positioning pin is removed with a tool, and then a fork-shaped wrench is inserted into the ear seat at the tail of the guide piston 165, and the fork-shaped wrench is rotated, so that when the guide piston 165 is rotated, the moving arc contact 162 will not rotate, thereby loosening the guide piston 165, and then taking out the guide piston 165, and finally taking out the moving arc contact 162 while removing the guide piston removal tool 70; Dismantle the moving arc contact unit 160 for inspection and seal replacement: Inspect the main contact fingers and arcing contact fingers of the contact finger circuit part of the moving arc contact unit 160. Replace them one by one if they are worn; measure the ablation of the moving main contact nozzle, and decide whether to replace the arc extinguishing part of the moving main contact with a new one based on the measurement result and the circuit breaker breaking situation; if not replaced, use a scouring pad to polish and clean the nozzle and plum blossom contact fingers on the moving arc contact 162 with ablation marks, replace the sealing ring, and reinstall the moving arc contact unit 160; finally, reinstall the integrated moving contact module 130.

[0049] In this embodiment, the disassembly, inspection and seal replacement of the transmission mechanism module 150 includes the following steps: Use the opening and closing wrench to rotate the moving contact module 130 to the opening position, use the hexagonal wrench to remove the fixing bolts on the end cover of the transmission mechanism module 150, install the lifting lugs on the end cover of the transmission mechanism module 150 to lift it, use the bridge crane to slightly force the end cover, and remove the bottom transmission mechanism; Disassemble the bottom transmission mechanism, replace the axle pin of the transmission mechanism main shaft, replace the sealing ring and seal between the bottom transmission mechanism main shaft and the cover plate, replace the seal on the bottom transmission mechanism cover plate, replace the connecting arm seal and axle pin outside the bottom transmission mechanism cover plate, and then reinstall the bottom transmission mechanism as a whole.

[0050] In this embodiment, the reinstallation of the GCB arc extinguishing chamber 100 includes the following steps: Reinstall the moving contact module 130: After the moving contact module transmission system is reinstalled, the moving contact module is turned 180 degrees, the moving contact module transmission system is connected to the main shaft of the bottom transmission mechanism in the transmission mechanism module 150, and the explosion-proof membrane 140 is reinstalled; Reinstall the transmission mechanism module 150: replace the seals on both sides of the base insulator, first reinstall the base insulator onto the moving contact module 130, then replace the rotating insulating plate inside the base insulator, and finally reinstall the transmission mechanism module 150 as a whole; Break insulator 120: replace the seal of the heating chamber inside the break insulator 120, replace the seals on both sides of the break insulator 120, and put the break insulator 120 onto the moving contact module 130; Reinstallation of the static contact module 110: Rotate the static contact module 110 as a whole back onto the break insulator 120 .

[0051] In this embodiment, the gas recovery operation of the GCB arc extinguishing chamber 100 includes the following steps: Vacuuming and pressure holding test: connect the gas pipe of the gas operation vehicle to the gas charging interface of GCB arc extinguishing chamber 100 and the vacuum pump respectively, turn on the vacuum pump, start vacuuming, and when the vacuum degree in the arc extinguishing chamber is 133Pa, continue vacuuming for 30 minutes and then turn off the vacuum pump, close the gas pipe valve on the vacuum pump, read the vacuum degree A after 30 minutes of rest, and read the vacuum degree B after an interval of 5 hours. If BA≤67Pa, it is considered that the sealing performance is good; Fill the arc extinguishing chamber with SF6 gas: Use an SF6 gas analyzer to test the new SF6 gas in the SF6 gas cylinder. It can be used only after the test result is qualified. Connect the pressure reducing valve and the gas pipe to the SF6 gas cylinder, and adjust the pressure value of the pressure reducing valve outlet to 0.1MPa; Open the valve of the SF6 gas cylinder, and after the SF6 gas has exhausted all the air in the air pipe, connect the other side of the air pipe to the gas nozzle of the GCB arc extinguishing chamber 100, and fill the GCB arc extinguishing chamber 100 with new SF6 gas to 0.1MPa; after the filling is completed, close the valves of the SF6 gas cylinder and the pressure reducing valve, and remove the air pipe connection with the SF6 gas cylinder; wrap each sealing part with plastic film for 5 hours, measure the SF6 gas content, and the volume fraction is not more than 15mol / L to be qualified.

[0052] Finally, it should be noted that the above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A GCB arc extinguishing chamber disassembly and maintenance tooling system, characterized in that: The invention comprises an arc extinguishing chamber transfer tool (20), a static contact transfer tool (30), a life measurement tool (40), a moving arc contact fixing tool (50), a moving arc contact support cover removal tool (60) and a guide piston removal tool (70); the arc extinguishing chamber transfer tool (20) is used to transfer the GCB arc extinguishing chamber (100) as a whole and to transfer the moving contact module (130), and the static contact transfer tool (30) is used to transfer the static contact module (110). The life measuring tool (40) is used to measure the height of the moving arc contact (162) in the moving contact module (130); the moving arc contact fixing tool (50) is used to install and fix the moving arc contact unit (160); the moving arc contact support cover removal tool (60) is used to remove the support cover (163) on the moving arc contact unit (160); and the guide piston removal tool (70) is used to remove the guide piston (165) after fixing the moving arc contact (162).

2. A method for disassembling and repairing a GCB arc extinguishing chamber, characterized in that: A GCB arc extinguishing chamber disassembly and maintenance tooling system as described in claim 1 is adopted, and the maintenance method includes the following steps: S1, GCB arc extinguishing chamber (100) gas recovery operation; S2, lifting the GCB arc extinguishing chamber (100) by using the arc extinguishing chamber transfer tool (20), removing the static contact module (110), and transferring the removed static contact module (110) by using the static contact transfer tool (30); S3, the break insulator (120) is removed; S4, measuring the height of the moving arc contact (162) in the moving contact module (130) in different states by using a life measurement tool (40) to determine the service life of the moving arc contact (162) and calculate the stroke of the moving arc contact (162); S5. Remove and inspect the explosion-proof membrane (140); S6, dismantling the transmission mechanism module (150); S7, dismantling, inspecting and replacing the seal of the stationary contact module (110); wherein the electrical life of the stationary arc contact of the stationary contact module (110) is measured and determined; S8, dismantling, inspecting and replacing the seal of the moving contact module (130); wherein the moving arc contact unit (160) is supported and fixed by a moving arc contact fixing tool (50), the support cover (163) on the moving arc contact unit (160) is removed by a moving arc contact support cover removal tool (60), the moving arc contact (162) is fixed in a limited position by a guide piston removal tool (70), and then the guide piston (165) is removed and separated; S9, dismantling, inspecting and replacing the seal of the transmission mechanism module (150); S10, GCB arc extinguishing chamber (100) reinstall; S11, GCB arc extinguishing chamber (100) gas recovery operation.

3. A GCB arc extinguishing chamber disassembly and maintenance method according to claim 2, characterized in that: In S1, the gas recovery operation of the GCB arc extinguishing chamber (100) includes the following steps: Gas recovery: Before gas recovery, the gas pressure in the GCB arc extinguishing chamber (100) is measured and recorded, and then the SF6 gas in the GCB arc extinguishing chamber (100) is recovered cleanly through the gas recovery device; Breaking the vacuum in the arc extinguishing chamber: Install a joint at the air pipe interface of the GCB arc extinguishing chamber (100), push open the check valve on the GCB arc extinguishing chamber (100), and allow dry air to enter the GCB arc extinguishing chamber (100) through the joint until the air pressure in the GCB arc extinguishing chamber (100) is the same as the atmospheric pressure.

4. A GCB arc extinguishing chamber disassembly and maintenance method according to claim 2, characterized in that: In S4, during measurement, the moving contact module (130) is placed stably on a workbench with the moving arc contact (162) facing upwards, the moving contact module (130) is opened and closed using an opening and closing wrench, a life measurement tool (40) is placed on the moving contact module (130), heights L1 and L2 of the moving arc contact (162) of the moving contact module (130) at the opening and closing positions are measured, and a stroke L3 of the moving arc contact (162) is obtained by subtracting L1 from L2; wherein, when L1 and L2 are less than a threshold value, it is determined that the moving arc contact (162) has reached the end of its service life and needs to be replaced.

5. A GCB arc extinguishing chamber disassembly and maintenance method according to claim 2, characterized in that: In S6, the moving contact module (130) is rotated to the open position using an opening and closing wrench, the fixing bolts on the end cover of the transmission mechanism module (150) are removed using an inner hexagonal wrench, a lifting lug is installed on the end cover plate of the transmission mechanism module (150) to lift it, the transmission mechanism module (150) is removed, and then the supporting insulator is removed.

6. A GCB arc extinguishing chamber disassembly and maintenance method according to claim 2, characterized in that: In S7, disassembling, inspecting and replacing the seal of the stationary contact module (110) includes the following steps: Measurement of the electrical life of the static arc contact of the static contact module (110): using a micrometer to measure the diameter of the static arc contact nozzle; if the diameter is greater than a threshold value, it is determined that the static arc contact has reached the end of its service life and needs to be replaced; Removal of the static arc contact: remove the fixing bolts between the static arc contact and the static contact module (110), and hoist the static arc contact as a whole and place it in the maintenance area; Inspection of static arc contacts: Inspect the surface of the static arc contacts and use a scouring pad to clean any traces of ablation, and replace the seal of the bottom cover of the static arc contacts; Whether to replace the static arc contact with a new one is determined based on the measurement result of the ablation of the static arc contact nozzle. If not, the static arc contact is disassembled into its components, the internal arc extinguishing guide tube of the static arc contact is replaced, and the nozzle and plum blossom contact fingers on the static arc contact with ablation marks are polished and cleaned with a scouring pad, and then reassembled into an integrated static contact module (110).

7. A GCB arc extinguishing chamber disassembly and maintenance method according to claim 2, characterized in that: In S8, disassembly, inspection and seal replacement of the moving contact module (130) include the following steps: Removing the moving arc contact unit (160): switching the moving contact module (130) to the closing position, removing the fixing bolts between the moving arc contact unit (160) and the moving contact module (130), and lifting the moving arc contact unit (160) out and installing it on the moving arc contact fixing fixture (50); Disassembly of the moving arc contact unit (160): installing the moving arc contact support cover disassembly tool (60) onto the moving arc contact fixing tool (50); firstly, using a hot air gun to heat the threaded portion where the support cover (163) and the moving arc contact housing (161) are connected to each other to melt the internal thread glue at the threaded portion; after the thread glue is melted, the end of the moving arc contact housing (161) is installed with a fixing seat (61) and a twisting piece (62) of the moving arc contact support cover disassembly tool (60); one end of the twisting piece (62) is clamped and fixed to the support cover (163), and the other end passes through the center hole of the fixing seat (61); a wrench is clamped on the end of the twisting piece (62) extending out of the fixing seat (61), and the support cover (163) is rotated and disassembled; finally, the moving arc contact support cover disassembly tool (60) is removed, and the internal components are disassembled and taken out; Removal of the moving arc contact (162): After one end of the guide piston removal tool (70) is inserted into the moving arc contact (162), the other end of the moving arc contact housing (161) is bolted and fixed. At this time, the inner polygonal groove (71) of the guide piston removal tool (70) is inserted into one end of the moving arc contact (162) and inserted into the polygonal step (164) on the moving arc contact (162). The positioning pin of the guide piston (165) is heated with a hot air gun, and the positioning pin is removed with a tool. Then, a fork wrench is inserted into the ear seat at the tail of the guide piston (165), and the fork wrench is rotated to loosen the guide piston (165), and the guide piston (165) is removed. Finally, while removing the guide piston removal tool (70), the moving arc contact (162) is removed. Disassembly inspection and seal replacement of the moving arc contact unit (160): inspect the main contact fingers and arcing contact fingers of the contact finger circuit part of the moving arc contact unit (160), and replace them one by one if they are worn; measure the ablation condition of the moving main contact nozzle, and decide whether to replace the arc extinguishing part of the moving main contact with a new one based on the measurement result and the circuit breaker breaking condition; if not replaced, use a scouring pad to clean the nozzle and plum blossom contact fingers on the moving arc contact (162) with ablation marks, replace the sealing ring, and reinstall the moving arc contact unit (160); Finally, the integrated moving contact module (130) is reassembled.

8. A GCB arc extinguishing chamber disassembly and maintenance method according to claim 2, characterized in that: In S9, the disassembly, inspection and seal replacement of the transmission mechanism module (150) includes the following steps: Use an opening and closing wrench to rotate the moving contact module (130) to the opening position, use an inner hexagonal wrench to remove the fixing bolts on the end cover of the transmission mechanism module (150), install a lifting lug on the end cover of the transmission mechanism module (150) to lift it, use a bridge crane to slightly apply force to the end cover, and remove the bottom transmission mechanism; Disassemble the bottom transmission mechanism, replace the axle pin of the transmission mechanism main shaft, replace the sealing ring and seal between the bottom transmission mechanism main shaft and the cover plate, replace the seal on the bottom transmission mechanism cover plate, replace the connecting arm seal and axle pin outside the bottom transmission mechanism cover plate, and then reinstall the bottom transmission mechanism as a whole.

9. A GCB arc extinguishing chamber disassembly and maintenance method according to claim 2, characterized in that: In S10, the GCB arc extinguishing chamber (100) is reinstalled, including the following steps: Reinstalling the moving contact module (130): after the moving contact module transmission system is reinstalled, the moving contact module is turned over 180 degrees, the moving contact module transmission system is connected to the main shaft of the bottom transmission mechanism in the transmission mechanism module (150), and the explosion-proof membrane (140) is reinstalled; Reinstalling the transmission mechanism module (150): replacing the seals on both sides of the base insulator, first reinstalling the base insulator onto the moving contact module (130), then replacing the rotating insulating plate inside the base insulator, and finally reinstalling the transmission mechanism module (150) as a whole; Break insulator (120): replace the seal of the heating chamber inside the break insulator (120), replace the seals on both sides of the break insulator (120), and attach the break insulator (120) to the moving contact module (130); Reinstalling the static contact module (110): reinstall the static contact module (110) as a whole onto the break insulator (120).

10. A GCB arc extinguishing chamber disassembly and maintenance method according to claim 2, characterized in that: In S11, the gas recovery operation of the GCB arc extinguishing chamber (100) includes the following steps: Vacuuming and pressure holding test: connect the gas pipe of the gas operation vehicle to the gas charging interface of the GCB arc extinguishing chamber (100) and the vacuum pump respectively, turn on the vacuum pump and start vacuuming. When the vacuum degree in the arc extinguishing chamber reaches 133Pa, continue vacuuming for 30 minutes and then turn off the vacuum pump. Close the gas pipe valve on the vacuum pump and read the vacuum degree A after 30 minutes of rest. Read the vacuum degree B after another 5 hours. If BA≤67Pa, the sealing performance is considered to be good. Fill the arc extinguishing chamber with SF6 gas: Use an SF6 gas analyzer to test the new SF6 gas in the SF6 gas cylinder. It can be used only after the test result is qualified. Connect the pressure reducing valve and the gas pipe to the SF6 gas cylinder, and adjust the pressure value of the pressure reducing valve outlet to 0.1MPa; Open the valve of the SF6 gas cylinder. After the SF6 gas has completely expelled the air in the gas pipe, connect the other side of the gas pipe to the gas nozzle of the GCB arc extinguishing chamber (100), and fill the GCB arc extinguishing chamber (100) with new SF6 gas to 0.1MPa. After the filling is completed, close the valves of the SF6 gas cylinder and the pressure reducing valve, and remove the gas pipe connection with the SF6 gas cylinder. Wrap each sealing part with plastic film for 5 hours, and measure the SF6 gas content. The volume fraction is not more than 15mol / L, which is qualified.

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